LA Expert Witness

DTR Consulting Services is a specialized architectural firm providing building envelope, waterproofing consulting, and forensic investigation services from their Los Angeles office, with expertise in construction defect analysis.

Kleinfelder provides environmental engineering, geotechnical, and construction services from their downtown Los Angeles office, with environmental engineers and scientists delivering full lifecycle solutions from site assessment through remediation.

Gentosi Construction Consulting is a second-generation family-owned firm providing construction consulting, litigation support, and expert witness services for commercial, industrial, and residential construction law cases in Southern California.

FACS has provided certified industrial hygiene and environmental consulting services since 1986, including asbestos, lead, and mold surveys, indoor air quality evaluations, and litigation support from their Los Angeles office.

California Consultants, led by founder Barry Taheri, provides forensic construction investigation, building envelope analysis, and expert witness services with over 24 years of experience in building science and waterproofing systems.

Nelson Forensics provides forensic engineering, architectural, and scientific services from their Irvine, California office, identifying damage and developing remediation solutions for buildings and property caused by natural perils, misuse, and construction errors.