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Gidon R Vardi PhD

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Over 45 years of combined construction and insurance industry experience. Apprenticeship with a master carpenter at Long Beach City College.  Obtained a California (B) General Building Contractors’ License (1976) and subsequent General Electrical (C-10), Fencing (C-13), Flooring (C-15), Lathing & Plastering (C-35) Roofing (C-39), Tile (Mosaic) (C-54). Past licenses as well as general contractor in Arizona, Nevada and Washington.  Hands on experience in all phases and trades of construction both residential and commercial, including: site-work, concrete, masonry, framing, waterproofing, insulation, roofing, flashing and sheet metal, doors & windows, flooring (all types), lath & plaster, gypsum board (drywall), acoustic treatment, painting, ceramic tile, mechanical, electrical, plumbing, steel, fencing, furniture fixtures and equipment, food service and equipment.  Construction management experience: supervision, project management, and estimating. Remodel and restoration of medical facilities, restaurants, military facilities, high rise interior and exterior, major department store remodeling, industrial retrofitting, retail and commercial tenant improvement and residential projects. Presently specializing in construction consulting, expert witness, and forensics.

Construction Consultant & Investigator

Perform residential and commercial inspections.  President of  XL Services  a division of AT Vardi, Inc., a private consulting firm specializing in evaluation of construction related product and property damage causation and determination of scope including: construction defect, water intrusion, mold, negligence, subrogation and liability, reconstruction and replacement cost, construction documentation, code and safety requirements, performance and completion responsibility, real estate disclosure requirements, general contractor and subcontractor responsibility, normal and customary industry standards and practices.  Project management including scheduling, budgeting and on-site inspections.  Coordinate architects, engineers, subcontractors, government officials and owners.

Building Inspector

ICC Certified Building Inspector and ICC Certified Accessibility Inspector/Plan Examiner: Research and give expert opinions regarding code compliance, safety,  ADA (American with Disability Act) compliance, and habitability claims (commercial and residential).  California Building Code certified.

Personal Injury Consultant & Investigator 

Investigate, consult and report on a variety of personal injury claims including; Construction site accidents, OSHA violations/compliance. Cases include the use of power tools, scaffolding, ladders, skylights, open trenches, glass or other material installation, heavy equipment including cranes, lifts, forklifts, material handling equipment, construction vehicles, and general construction operations.  Slip, trip and falls and ADA (American with Disability Act) violations/compliance, floor safety, lighting issues, industry standard violations, premises liability, care and maintenance, habitability, and injury prevention.  Claim experience includes; Shopping centers, parking lots, single and multi-unit residential buildings, schools, hotels, office & medical buildings, roofs, public throughways, restaurants, food and pharmaceutical, industrial buildings, open-air theatre, winery,  garage doors, and airport.  We provide on-site testing including; coefficient of friction, light level, and door pressure.


  •  ICC (International Code Council) Certified Accessibility Inspector/Plan Examiner#1064803-21
  • ICC (International Code Council) Certified Building Inspector #1064803-B5
  • ICC (International Code Council) Certified California Commercial Building Inspector – I1 #1064803
  • ICC (International Code Council) Certified California Residential Building Inspector – J1 #1064803
  • Licensed California General Building Contractor  – #324138, since 1976 (B, HIC)(Inactive)
  • Licensed California Electrical Contractor – #324138, C-10 Classification (Inactive)
  • Licensed California Fencing Contractor – #324138, C-13 Classification (Inactive)
  • Licensed California Roofing Contractor – #324138, C-39 Classification (Inactive)
  • Corporate California General Building Contractor’s License #806851 (B & HIC) (Active)
  • Licensed California Electrical Contractor – #806851, C-10 Classification (Active)
  • Licensed California Fencing Contractor – #806851, C-13 Classification (Active)
  • Licensed California Flooring Contractor – #806851, C-15 Classification (Active)
  • Licensed California Lathing & Plastering Contractor – #806851, C-35 Classification (Active)
  • Licensed California Tile (Mosaic and Stone) Contractor – #806851, C-54 Classification (Active)
  • Licensed California Independent Insurance Adjuster #2C21206 (Active)
  • Licensed Arizona Building Contractor – #133192, B Classification (Inactive)
  • Licensed Nevada General Building Contractor – #0046477 B Classification (Inactive/not renewed)
  • Licensed Nevada Roofing and Siding Contractor -# 0046476 C15 Classification (Inactive/not renewed)
  • Licensed Washington State Construction Contractor – #VARDICS169OD (Inactive/Archived)
  • U.S. Department of Labor – OSHA certified GPO 865-164 (1974)
  • U.S. Department of Labor Federal OSHA Authorized Construction Trainer #C 0068225 (2015)
  • Regan Scientific Instruments, Inc.-Certificate of Training-BOT-3000E tribometer Operator Proficiency(2017)
  • Former CSLB Arbitrator under California Business and Professions Code §7085.5
  • Former certified Emergency Medical Technician IIB
  • Former certified intra-insurance industry arbitrator of property, liability and casualty claims
  • Former,Fellow,  American Board of Forensic Examiners  – Board Certified Forensic Examiner – No. 2649


  • Long Beach City College, Associate Of Science – 1972 Architectural Design
  • California Polytechnic University – Pomona -Construction Engineering, Urban Planning OSHA Certificate – 1974
  • California Coast University,  Bachelor of Science – 1991 Business Administration
  • UCLA Extension,  Mediation – Certificate 1997
  • Pepperdine University School of Law – Straus Institute for Dispute Resolution Mediation – Certificate 1998
  • California Coast University, Doctor of Philosophy – 2001- Business Administration
  • Certificate of Completion – Environmental Microbiology Laboratory, Inc. – Fundamentals of Mold, Biological Sampling and Report Interpretation – 2002
  • Certified Completion of California Adjuster Earthquake Training DOI #272548 – 2012
  • California Fair Claims Law Certification – 2012
  • California State University Dominguez Hills – 2015 Certificate – OSHA 510 – Standards For The Construction Industry
  • California State University Dominguez Hills – 2015 Certificate – OSHA 500 – Train-The-Trainer

In addition to the above education, over the past 40 years and on-going, attendance at numerous seminars, training and lectures.


  • Los Angeles County Superior Court
  • Los Angeles County Small Claims Court
  • Riverside County Superior Court
  • San Bernardino Superior Court
  • San Luis Obispo County Superior Court
  • San Francisco Superior Court
  • Orange County Superior Court
  • San Diego Superior Court
  • Ventura County Superior Court
  • Sacramento County Superior Court
  • U.S. Federal District Court – San Francisco
  • U.S. Federal District Court – Los Angeles
  • Varies Arbitrations, Mediations and Appraisal Hearings

Expert Trial Testimony

Qualified in Superior and Federal Courts To Testify On A Variety Of Issues Including:

  • Contractor’s standard of care
  • Trade-specific contractor performance issues including; grading, concrete, framing, roofing, stucco, drywall, floor finishes, painting, electrical, plumbing, windows & doors, ventilation, sheet metal, fencing, masonry, steel, and all trades incidental to general building construction
  • Business practices including record keeping
  • Delay claims & Construction scheduling
  • Building codes
  • Americans with Disabilities Act (ADA) codes and regulations
  • Personal injury including accident reconstruction
  • Construction damages and costs
  • Construction defects
  • Water intrusion cause and origin & Mold recognition including cause and origin
  • Fire, smoke, water, termite, wood rot restoration & Earthquake damages
  • Anticipated and customary wear and tear
  • Shopping mall and retail center premises liability, maintenance and safety
  • Floor safety
  • Garage door & closer function, inspection, installation and safety
  • OSHA regulations & Safety standards
  • Power tool safety
  • Scaffolding safety
  • Real estate disclosure and hidden damage
  • Structure classifications including mobile (manufactured home) vs. modular homes
  • Variety of structure types including; Single & multi family residence, restaurant, courthouse, hotel, office building, medical building, museum, site development
  • Conveyor belt safety procedures including lockout/tagout protocols
  • Qualified in federal court to testify on issues dealing with insurance premiums as they relate to contractors and developers, cost of repair, and bad faith.


Construction Projects

Residential Construction:

Rehabilitation, reconstruction and remodeling of over 500 single family residences.

Commercial Construction:    

Restoration, remodeling or construction of such projects as:  AMI Hospital North Hollywood, Central Plaza (4 office towers and ground floor retail), Neiman Marcus, Macy’s, Broadway, Exchange – Marine Corp Logistics Base- Barstow, Ann Taylor’s, Talbot’s, Women’s World, Elton’s, San Diego Wiping Materials, Country Fair Cinnamon Rolls, Victoria Secrets, El Portal Luggage, Broadway Place (restaurant), Gustavo’s, Mizrahi Bank, Numerous office interiors, Rehabilitation and reconstruction of several multi-unit multi-story dwelling complexes, schools, factories, various commercial buildings and the Mormon Church – Hawthorne

Consulting Projects

Residential Construction:

Inspection and damage assessment of; Over 300 residential units after the 1994 Northridge earthquake.  Over 3000 single family units involved in a variety of construction defect cases.  Over 200 single family units involved in non-litigation including custom home construction and special projects such as complex roof installation and major stucco and sheet metal repairs as well as first party property claims.

Commercial Construction:    

Post 1994 Northridge earthquake inspection and damage assessment of multi-unit, multi-story, dwelling complexes and commercial structures.   Post severe hail and wind damage inspection and assessment of large apartments complexes in Arizona and Colorado. Consult on scores of multi-unit, multi-story, dwelling complexes involved in construction defect cases and reconstruction.  Feasibility study for relocating and reconstruction of the Horton Grand Hotel. Damage assessment, determination of cost of repair and consulting for commercial structures such as: UCLA chemistry building, multi-story office building in downtown Los Angeles, 99¢ Super Store, El Encanto Hotel, mini-marts, warehouses, auto repair facilities, auto dealership, Red Line MTA subway tunnel, restaurants and a variety of other commercial buildings including the West Valley Jewish Community Center swimming pool Natatorium. Punch list consultant for Farrell’s Ice Cream Parlour. Special projects consultant on a multi-story condominium project. Construction management of retail projects such as Out Takes – Universal CityWalk and other commercial projects, waterproofing consultants on new and large repair and reconstruction projects including 122 unit apartment building, big box electronic equipment retail store, winery, art gallery, and hospital.

Mold, Fungi and VOC Investigation:

Conducted hundreds of cause and origin investigations involving water intrusion where mold, fungi or other VOC’s were suspected.  Trained extract bulk samples and to recognize the potential presence of mold and review laboratory analysis reports.

National and International Assignments

Work and consulting experience includes: California, Oregon, Washington, Arizona, Nevada, Colorado, Texas, New York, and Canada

Author, Lecturer, Teacher       

Articles published in industry publications such as “Claims” magazine; policy and procedure manuals on a variety of subjects including; Safety, construction management, insurance appraisals, and over 2,000 narratives, reports and/or opinions.  Seminars and lectures were given on a variety of subjects including; Construction management, estimating, construction methods, sick house and sick building syndrome, construction technology, replacement cost and actual cash value calculation, and conflict resolution. Ongoing article publication on company website

Federal Authorized OSHA Outreach Trainer authorized to teach the 10 hour and 30 hour OSHA training courses.

In addition, the following awareness topics are also included:

  • Inspections, citations, and proposed penalties
  • Recording and reporting occupational injuries and illnesses
  • General industry standards
  • Personal protective and life-saving equipment
  • Fire protection and prevention
  • Signs, signals, and barricades
  • Material handling, storage, use, and disposal
  • Tools hand and power
  • Welding and cutting
  • Electrical
  • Scaffolding
  • Fall protection
  • Helicopters, hoists, elevators, and conveyors
  • Motor vehicles, mechanized equipment (including forklifts), and marine operations
  • Excavations
  • Concrete and masonry construction
  • Steel erection
  • Underground construction, caissons, cofferdams and compressed air
  • Demolition
  • Blasting in the use of explosives
  • Power transmission and distribution
  • Rollover protective structures; overhead protection
  • Stairways and ladders
  • Diving
  • Toxic and hazardous substances
  • Cranes and Derricks in construction