Building Codes Consultants: 23

As an arbitrator, structural/civil engineer, and expert forensic consultant with nearly four decades of experience, Casey Hemmatyar has provided extensive expert services for defendants’ and plaintiffs’ attorneys on numerous construction litigation matters throughout the United States and Canada.

He has been retained as an expert engineer in over one hundred litigation matters on single and class-action legal cases by the U.S. government, law firms, and insurance carriers at the State and Federal levels, working with both plaintiff and defendant sides.

A partial list of litigation cases is available upon request. His understanding of core engineering and legal concepts has enabled him to assist a wide range of clientele effectively. He brings diversified experience in structural and civil engineering design and forensic engineering, investigation, and evaluation.

He also conducts research, has assisted in the development of building codes and standards, and has supervised the construction of domestic and international projects. His experience includes special structures and new buildings as well as modifications, alterations, seismic/hurricane retrofits, and upgrades to existing structures. He has provided failure analysis, expert consultation, structural forensic investigation, and damage assessment services for numerous litigation and insurance-related matters.

He actively presents continuing education lectures to audiences of licensed engineers, architects, and general contractors on topics of structural and forensic engineering throughout North America. Mr. Hemmatyar has been the principal structural engineer on high-profile projects for prestigious clients, including NASA and other notable organizations.  Currently, he directs PSFEG and has served as Director for SEAOSC from 2011 to 2013.

His work encompasses a diverse range of structures, including hospitals,  educational institutions (including schools and universities), telecommunication centers, aviation facilities, government buildings, laboratories, as well as commercial, industrial, and residential structures.

William R. Acorn is founder of Acorn Consulting Services, LLC, an engineering firm. As a consulting mechanical engineer, Bill provides project analysis, forensic reconstructions and litigation support services relating to the design, delivery, and functioning of high-tech manufacturing facilities, semiconductor fabrication facilities, institutional laboratories, data centers, health care facilities and a variety of commercial buildings. He is a recognized expert in the evaluation of deficiencies in HVAC systems, cleanrooms, piping systems, refrigeration systems, construction defects, building and fire code compliance, and patent and trade secret disputes. He represents both plaintiffs and defendants.

Bill has more than 40 years of experience as a professional engineer and is a recognized expert in assessing, evaluating, remediating and providing testimony on complex project design, construction and operational matters. His consulting expertise has been influential in shaping approaches to code compliance and life safety in semiconductor and similar advanced technology facilities.

Certifications and Designations:

• Registered as a Professional Mechanical Engineer in the States of Arizona, California, Colorado, Illinois, Iowa, Nevada, New Hampshire, New Mexico, Oregon, Texas, Utah and Washington.
• Registered with the National Council of Examiners for Engineering and Surveying NCEES (Certificate No. 6999)
• Fellow in the HVAC industry leading organization ASHRAE
• Visiting lecturer at the Arizona State University Del E. Webb School of Construction in Tempe, AZ
• Advisor to CREATE, ACE – Alliance for Construction Excellence and the IAB – Industry Advisory Board, all affiliated with ASU

Building Systems Analysis:

HVAC and Refrigeration Process and Power Piping Plumbing Systems Standard of Care in Design and Construction

Chemical Exposures in the Workplace Cleanroom Design and Performance Codes and Standards Patent and Trade Secret Disputes

Litigation Support: Bill’s pragmatic approach to both forensic and litigation consulting as well as project consulting is based on more than 40 years of real-world experience as a design professional, mentor and forensic analyst, as well as many years as an instructor in professional and academic settings. Represented both plaintiffs and defendants in a variety of jurisdictions throughout the US and Asia. Bill’s ability to explain complex issues to non-technical audiences, including juries, mediators and judges, is a key to successfully solving your litigation challenges.

• Forensic Analysis
• Strategic Litigation Consulting
• Trial Demonstratives
• Expert Testimony

Acorn Consulting Services

Consulting Services: Services range from peer review to conceptual design to development of strategies and programs for expedited project delivery.

Bill frequently acts as an owner’s agent and mentor, functioning as an extension of the owner’s project team. On other projects, Bill serves as a subject matter expert assisting project delivery firms in their development of viable solutions and review of construction documents.

As a project consultant, Bill assures the project gets off to the right start and provides his expertise through completion and operation to maximize return on investment.

Consulting Expertise Includes:

• Project Design and Management Consulting
• Forensic Analysis and Litigation Consulting
• Mentoring & Advanced Education

Architectural Forensic Consultants is a team of highly skilled professionals committed to delivering exceptional services in Architectural Forensics. With over 50 years of combined professional experience throughout the US, they offer a range of expert witness, building-related claim defense, building enclosure commissioning, architectural review consulting, and due diligence actions for property acquisition. Let us provide the expertise you need to ensure your projects

With years of experience and a team of experts who are actively practicing Architects with current AIA, NCARB, BECxP, and CSI accreditations, they provide top-notch analysis and reporting to help clients make informed decisions about your particular project.

Consulting Services:

• Building Enclosure Commissioning - Provides a framework for working with the architectural design and construction teams to help provide an optimized building enclosure that successfully performs and meets the Owner's Project Requirements. Includes providing construction document review, preconstruction meetings coordination, construction monitoring and performance testing of building enclosure components and systems to evaluate its resistance to water and air infiltration.
• Architectural Review- Provides expert outside review and consultation to Town or City Architectural Review Board members. Offer architectural standard reviews to help convey client needs and requests to architects and developers, streamlining your architectural review processes.
• Property Conditions Assessments- Commercial property and building assessments (also known as Property Condition Assessments or PCA's) are important for clients seeking to know the condition of a property or real estate they may be purchasing, leasing, financing or simply maintaining. PCAs identify deficiencies and can provide building users with a Capital Needs Plan.

Dan Weekes, AIA, NCARB, BECxP, CxA+BE, has over 25 years of Architectural and Engineering Building Envelope and consulting project management as well as litigation and deposition proceedings. As a licensed Architect, Mr. Weekes has experience with the design of new facilities and the implementation of repair programs to existing residential, commercial, and institutional facilities. He takes a common sense approach to design and focuses on optimizing building performance.

Mr. Weekes' goal is to Identify why buildings and structures in today's industry begin to fail well before they should, and provide consultation in the way of review, evaluation and testing during the construction process to greatly improve the overall performance of a particular project.

Jim Stutzman, AIA, NCARB, CSI, has over 45 years of exceptional Building Construction and Investigative Design work with an emphasis on expert litigation cases and design coordination.

Mr. Stutzman is an architectural forensic consulting and expert witness relating to the performance, failures, safety and hazards, code compliance, professional practice and construction contractual procedures for commercial, industrial and residential architectural projects and the contractual building process.

Forensic consulting services are focused on defense attorneys, insurance companies, financial institutions, developers, municipalities, and private clients. Mr. Stutzman has 32 years of experience as a Forensic Architect providing forensic analysis of building related claims and standard of care issues

View Architectural Forensics Consultants' Expert Witness Profile.

Dr. Randall Atlas AIA , CPP is a Registered Architect, NCARB certified, and he practices Criminal Justice Architecture and Environmental Security Design. Atlas is a certified protection professional (CPP) with the American Society of Industrial Security (ASIS), and is an appointed member of the ASIS Security Architecture and Engineering Committee. Atlas has his doctorate in criminology and a masters of architecture. Dr Atlas is a member of the American Institute of Architects (AIA) Architecture for Justice Committee.

Dr. Atlas has taught CPTED (Crime Prevention through Environmental Design) and criminal justice courses at Florida International University, Florida Atlantic University, and the University of Miami, Keiser University, and he is a trainer with the National Crime Prevention Institute at the University of Louisville. Dr. Atlas has been a technical Assistance consultant with the National Institute of Justice, National Institute of Corrections, and the Florida Department of Corrections and U.S. HUD Drug Elimination CPTED Program.

He has conducted ADA accessibility compliance audits for private and public sector clients, and served as an expert witness on over 200 premises liability lawsuits.

Dr. Atlas has been a speaker and trainer at security conferences from New Delhi, India to Seattle, Washington and has written over 200 articles in various publications on security, safety, and counter terrorism issues.

Gregory J. Cahanin Fire & Code Consulting works with clients to evaluate designs and buildings against code requirements, and resolve compliance issues identified by building or fire code officials. Services are available to architects, designers, property owners, and manufacturers.

 Services:

Fire Protection Analysis Fire Rated Construction Specifications Sprinkler specification and design Fire Alarm System specification

Atria Smoke Management Systems Hazardous Materials Handling and Storage Life Safety Code Compliance Pre-submittal Plan Review

Gregory J. Cahanin has worked in the Fire Protection and Life Safety field for over 40 years. He is nationally recognized as a Life Safety and Fire Protection expert, working with manufacturers on product and fire code development in addition to working with designers and building owners to achieve compliance. 

Background - Mr. Cahanin served as a Senior Life Safety Engineer with the National Fire Protection Association (NFPA), the organization that writes Fire Protection Codes and Standards. He was staff liaison for building construction standards and the Fire Prevention Code. Special project work included support of the International Division of NFPA in a survey of fire protection for all oil production facilities of LaGoven SA in Venezuela; an evaluation of the existing airport terminal in Rio De Janeiro, Brazil; and a code comparison study for the National Institute of Building Sciences. Mr. Cahanin investigated multiple fatality fires for NFPA and his reports are nationally published and peer reviewed. Mr. Cahanin holds Professional Grade Membership in the Society of Fire Protection Engineers. Mr. Cahanin has earned three undergraduate degrees in Fire Science and Fire Protection and a Master in Public Administration. Projects of Note:

• Hemingway Pilar Rum Distillery
• Hemingway Pilar Rum Bottling Plant
• Space Machine Brazing Dip Facility
• Sarasota Opera House Smoke Control System
• Hydrotech Rubberized Asphalt Melters
• Cornell Cookson UL Standard Development
• Smokeguard Corporation Elevator Lobby Standards
• Mahaffey Theater Renovation
• Thermotex Corporation Theater Fire Curtains

View Gregory Cahanin's Expert Witness Profile.

CivTek International is an Infrastructure Solutions, Program Management and Multi-Disciplined Life-Cycle Integrator. CivTek focuses on core industries and infrastructure fundamental to the economic and physical health and well-being of all societies: Energy, Water, Air, Agriculture, Transportation, Waste Management, Telecommunications, Internet, and Ancillary Technologies necessary to more efficiently deliver and operate these industries in an environmentally friendly, safe and profitable manner.

CivTek International now has roughly $50 billion in pre-feasibility studies in estimated capital costs projects as a result of national and international relationships and exclusive agreements CivTek International holds in various infrastructure and transportation technologies. They have signed 50-year Build-Operate-Transfer (BOT) Agreements with national governments of emerging economies.

CivTek International provides expert assessment, advice, guidance, opinion, contracting, construction support, program management and design services to leaders in government, industry and the legal community. They address major challenges in complex cultural settings, environmental, economic, legislative or forensic consequence in programs and projects relating to capital infrastructure in transportation, green sustainable environmental solutions, energy, oil & gas, and industrial facilities.

Clients have included Leadership of Domestic and International Industry, CEO's and Corporate Leadership, Banks, Financial Institutions and Investors, Risk Management and Insurance Industry Leaders, Attorneys, Legislators, Heads of State, and Heads of Departments and Ministries.

CivTek Capabilities:

General Infrastructure Real Estate and Land Development Executive Aviation Charter Airport Construction / Aviation Leadership International Oil Refinery - Design, Build, Operate, Transfer Project Financing Tank Farms

Ecofreighter and Deep Sea Marinas and Terminals Mining Water Supply Transportation Construction Management Healthcare and Resort Hospitals Information Technologies Program Management Office

Principal, Thomas J. Young, PE, has over 37 years of experience in national and international Transportation Construction, the Civil Engineering specialty regarding highways, bridges, rail, airports, harbors, and associated infrastructure.

Mr. Young is a skilled integrator of the parameters of program and project life cycles, leadership, management, business operations, engineering and construction. He has extensive knowledge of regulatory compliance, environmental processes, industry standards, best practices, and field operations in urban and remote areas.

Mr. Young has broad construction management and design background for many of the knowledge and skill areas required in mining operations, bridges, highways, land development, major soil/structure type facilities, land survey, and construction surveying, including work in Arctic facilities and in desert regions.

View Thomas J. Young's Expert Witness Profile.

CLM Engineering Associates has the ability to provide a vast array of services to real estate brokers, developers, home purchases/owners. President of the firm, Craig L. Moskowitz, PE, is a Civil Engineer with extensive Construction Management experience on both commercial and residential projects. His firm handles commercial and residential building inspections as it pertains to warranty and pre-purchase inspections as well as to handle specific Structural or Civil Engineering issues related to a property. 

Experience: Mr. Moskowitz has performed safety inspections on both civilian and military projects through the application of OSHA regulations. He has designed drainage systems for the government while an officer with the United States military and done cost estimating for various projects exceeding $500 million. 

Mr. Moskowitz has designed document creation and management of high-rise construction in Manhattan. He has managed telecommunications projects for Verizon in Manhattan including CPM schedule creation and updating and directed and managed all water distribution system and sewer system work while working as a contractor to the New York City Department of Design and Construction. CLM are specialists in the following areas:

• Traditional Commercial and Residential Building Inspections
• Storm Damage Assessment, Analysis and Reporting
• Comprehensive Construction Management
• Cost Estimating for Projects Ranging from $50,000 to in Excess of $1 billion
• Construction Scheduling and Delay Analysis
• Building Code and Drawing Review

View Craig Moskowitz's Expert Witness Profile.

Complete General Contractors, Inc., is a licensed General Contracting Construction Firm working throughout the Southeast for insurance companies, property owners, property managers, attorneys, and municipalities. They specialize in the cost estimation and causation of large loss complex property claims. Services Include:

• Appraisal and Mediation Services - Fire, wind, flood, storm, hail, and water losses to residential, commercial, or industrial properties
• General Contracting Services - Restoration or general construction, commercial construction, or industrial construction projects all over the United States. Manage vendors and trades, handle project documents, and serve as an authority for project information to all parties throughout the construction process

John G. Minor, President of Complete General Contractors, is a third-generation Contractor and licensed instructor certified by the North Carolina Department of Insurance. He is a recognized expert on the costs and applications necessary to repair buildings damaged by manufacturer, builder liability, water damage or intrusion, mold, or asbestos. Mr. Minor has provided for the successful restoration of millions of dollars in insurance restoration, building failures, and difficult repairs originating from defective construction practices and materials such as fire, wind, water, mold and mildew. His services were in demand for restoration on custom buildings on Bald Head Island. In addition to managing the business of Complete, Inc., John Minor teaches classes on mold and mildew remediation and prevention through proper building practices to a variety of clients thru Lorman Educational Services and other professional trainers. View John Minor's Expert Witness Profile.

Construction Strategies provides a complete range of Construction and Construction Consulting services. They offer pre-construction services for owners considering future projects who need assistance in evaluating the feasibility and conceptual costs. Construction Strategies also offers post construction services for owners who are facing close out problems including conflict resolution, mediation assistance, close out service completion, punch lists, and warranty assistance.

Pre-Construction Services Value Engineering Analysis Constructability Reviews Design Team Management Scope Package Development Estimate Evaluations Bid Evaluations & Recommendations Contract Negotiation Support Program Procedures Scheduling Development or Analysis

Post-Construction Services Change Order Negotiation Contract Administration Dispute Resolution Management Information System Document Control Systems Post Completion Analysis Quality Control Inspections Code Compliance Inspections Close Out Evaluation

Principal, Sanford C. Loy , CCM, B.Arch, MSCE, has over 40 years of experience in the Construction Industry. Mr. Loy has Degrees in Architecture and Engineering. A Certified Construction Manager (CCM), he is committed to the Code of Ethics and Standards of Professional Practice established by the Construction Management Association of America. CCM is the ANSI accredited professional designation for construction management and is the gold standard for CM service providers in over 145 countries.

Background Experience - Mr. Loy's experience spans virtually every type of building and design process. His strength centers on his understanding of the dynamics and interactions of the various trades and professions unique to every building project. He has experience with Construction Management at Risk, Construction Management Agency, Design-build, and Design-bid-build. Having successfully managed the completion of over one billion dollars of construction, Mr. Loy served as a Regional Engineer for the American Institute of Steel Construction and as Director of Construction and Development for Belz Enterprises, the largest development company in Tennessee, before founding Construction Strategies in 1988.

See more at our website: https://www.construction-strategies.com

View Sanford Loy's Expert Witness Profile.

DM Bekus Construction is a New Jersey Home Design, Construction, and Remodeling Contractor. For over 30 years they've been helping homeowners throughout the area improve properties and build homes. DM Bekus Construction delivers high quality, reliable construction services that help homeowners get more pleasure and enjoyment from their homes and buildings.

Services Include:

New Home Construction Interior Remodeling Exterior Remodeling

Construction Project Management Homeowner Association Construction Expert Witness Services

Principal, David M. Bekus has over 35 years in the Construction Industry specializing in home design, construction, and remodeling. He offers services to homeowner associations, housing communities, townhome complexes, property managers, and individuals.

Mr. Bekus is licensed by the State of New Jersey as a building inspector (RCS, ICS, and HHS), a licensed home remodeler, and a licensed new home builder. He is also certified in Project Management, Cost Estimating, Construction Methods, Construction Site Safety, and is a EPA Lead Safe Certified Contractor.

Mr. Bekus has been a project manager, overseeing all aspects of construction from conception and approvals to final sales for single homes and developments. He has designed and built over 100 custom homes.

View David Bekus' Expert Witness Profile.

• Over 35 years of experience in Mechanical / Structural Engineering & Design, Failure Analysis, Product Liability, Industural Asbestos,Pressure Vessel & Boiler analysis and evaluation of mechanical and structural components.
• Extensive trial experience. Has been involved in multi-million dollar cases. Areas involved included:

  
  

  - Piping & pipe supports - Structural failure of products - Failure analysis - Industrial asbestos - Seismic analysis - Fire protection - Pressure vessels

  - Tanks - Construction - Heat transfer analysis - Environmental qualification of equipment - Welding - Product design - Patent information

• Expertise in developing litigation rate-case exhibits and detailed supporting testimony, and in organizing case documentation into easy-to-use computer databases for trial use.

Expanded Resources LLC is a construction management consulting firm serving the legal and construction industries.

Expert Witness Services

At Expanded Resources, we bridge the gap between construction complexity and clarity. With decades of boots-on-the-ground experience—and a teaching background —we know how to translate multifaceted issues into easily understandable narratives. You’re not just getting an expert. You’re gaining a guide who understands and explains complex construction matters with clarity and conviction.

Construction Management Consulting

We help organizations manage their construction portfolios, programs, and projects more efficiently.

We start by listening. Through targeted interviews, surveys, and meetings with stakeholders at every level—from senior leadership to field staff—we uncover how your teams really operate.

We dig into your systems, documents, and workflows to pinpoint gaps, bottlenecks, and inconsistencies. Whether it’s outdated software, mismatched forms, or policies no one follows, we find what’s not working—and why.

Next, we deliver a clear roadmap tailored to your organization. Think of it as an operating manual, grounded in contract compliance and practical experience. 

Implementation isn’t left to chance. We build your team's capability through guided training, toolkits, and change support. Whether onboarding new project managers or retooling seasoned teams, we help embed the right habits across your organization.

Kiwesa King, PE, CCM, DBIA, PMP, is a Licensed Professional Engineer and a Certified Construction Manager and Trainer.

Ms. King has managed restoration, renovation, and ground-up construction projects as a designer, subcontractor, general contractor, and construction manager. She teaches graduate and continuing education courses in Construction Management at Fordham University and New York University.

Degrees and Certifications:

• New York State Licensed Professional Engineer
• Bachelor of Science and Master of Science in Mechanical Engineering
• Certificate of Competence- Master Fire Suppression Contractor - New York City Department of Buildings (NYCDOB)
• Site Safety Manager: NYCDOB
• Certified Construction Manager: Construction Management Association of America
• Designated Design-Build Professional:  Design-Build Institute of America
• Project Management Professional: PMI

View Kiwesa King's Expert Witness Profile.

Roger W. Griffith, PE, has over 37 years of professional experience as a Mechanical Engineer in the design, maintenance, and operation of mechanical systems. He specializes in the areas of Plumbing, HVAC, and Fire Sprinkler Systems Design.

Background - As the principal of Griffith Engineering & Consulting for 23 years, his design experience with commercial and industrial projects include convention centers, schools, office buildings, condominiums, apartment buildings, hotels, churches, manufacturing facilities, medical buildings, restaurants, historic buildings, dormitories, fire halls, and maintenance facilities. Prior to that, Mr. Griffith worked at the Tennessee Valley Authority (TVA) as a mechanical engineer for 14 years. 

His roles at TVA included nuclear piping analyst, valve and heat exchanger specialist, maintenance engineer, and later maintenance supervisor at a fossil plant, and quality manager. His engineering roles included failure analysis of plant equipment. He also taught many courses on the subject of problem-solving and failure analysis for company employees.

Consulting Services:

HVAC Design Plumbing Design Hot Water Systems Design

Legionella Outbreaks HVAC Design Carbon Monoxide Poisoning Sprinkler System Design

View Roger W. Griffith's Expert Witness Profile.

Dr. Fari Barzegar is a Licensed Engineer with 37 years of experience in Civil and Structural Engineering & Construction Forensics, Construction Project Management, university teaching/research. He has been an Expert Consultant / Witness in over 100-cases.

Litigation-Support Consulting Expert Witness with testimony and trial experience. Has been retained by insurance companies, law firms, construction, energy, mining, technology & manufacturing industries, governmental & educational institutions, engineering and architectural firms, property owners and individuals. Consultant in both plaintiff and defendant cases.

• Insurance & Surety Claims, Peer Reviews
• Buildings, Structures & Materials: Residential, Commercial, Institutional, Historic Structures; Bridges, Towers, Stacks/Chimneys, Containment Vessels, Tanks, Grain Silos, Conduits & Pipelines, Retaining Walls, Foundations, Slabs & Pavements; Concrete, Steel, FRP Composites, Wood, CMU, Brick Masonry & Adobe
• Design / Construction / Integrity issues, Seismic Resistant Design; Errors & Omissions;Standards of Care; Repair & Retrofit Design Documents
• Construction Defects & Accidents; Defective Concrete; OSHA Standards, Excavations / Trenching / Scaffolds
• Slip/Trip/Fall, Code Compliance
• Damage & Failure Investigation; Due Diligence; Non-Destructive Testing 
• Explosion, Impact, Earthquake, Wind, Fire, Hurricane & Flood Damage Inspections / Analysis/Report
• Pile Driving & Demolition Damage to Adjacent Facilities: Vibrations, Cracking / Settlement
• Dynamic, Fracture, Thermal & Finite Element Stress Analysis; Product Design; Failure Simulation / Reconstruction
• Intellectual Property & Patent Infringement

Indian River Construction Services, Inc., offers many services to Home Owners, Home Owner Associations, Property Managers, and Building Owners. The most licensed construction firm in the state of Florida, they consult on project and building plans to help determine suitability, feasibility and cost controls for:

New Construction - Construction Repairs - Construction Additions - Construction Remodeling - Real Estate Improvements

Indian River Construction also has extensive experience in performing Insurance Adjusting Services as Florida Licensed Public Insurance Adjusters. This means they work for you and not for the insurance company, allowing them to get the best possible insurance settlement from insurance claims, whether that be a fire, flood, or hurricane. 

Andrew Allocco, PE, Principal at Indian River Construction Services is a leading Construction Consultant, Florida Licensed Public Insurance Adjuster, and Real Estate Broker. With over 45 years of experience in his fields of expertise, Mr. Allocco's services are sought by individuals, corporations, developers, and law firms to oversee and advise on construction projects. He is the current owner of construction, real estate, and engineering consulting firms.

Background Experience - Mr. Allocco is the President of Indian River Construction Services, Inc. Prior to his current role, he served as the President of Better Homes Construction Services, Inc. of Miami, Florida, which performed in excess of 40,000 Building Inspections. A Forensic Consulting Engineer, he inspects Commercial, Residential, and Industrial Facilities before, during, and after construction. He assists property owners with complex insurance claims, some of which involve significant and lengthy litigation

Mr. Allocco is not only licensed in the State of Florida as a Professional Engineer and Licensed Public Insurance Adjuster, he holds more licenses both presently active and past than any other individual in the State, including:

BA, SUNY Maritime College, Marine Nuclear Engineering Florida Licensed Professional Engineer Florida Certified General Contractor Florida Certified Mechanical Contractor Florida Certified Air Conditioning Contractor Florida Certified Roofing Contractor

Florida Certified Plumbing Contractor Florida Certified Electrical Contractor Florida Certified Commercial Swimming Pool & Spa Contractor Florida Licensed Home Inspector Florida Licensed Solar Contractor Florida Licensed Real Estate Broker

View Andrew Allocco's Expert Witness Profile.