VERTEX has Experts that Talk the Talk and Walk the Walk.

Unlike others, VERTEX provides forensic consulting alongside traditional AEC services which allows for a 360 degree view of your project.

VERTEX Services


VERTEX delivers innovative solutions on complex projects globally.

Since 1995, VERTEX has completed over 90,000 projects.

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VERTEX believes in a Lifetime of Learning philosophy.

Stay current with our industry experts as they share their insights and knowledge on the built environment.

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Grow Your Career

Join Our Team

VERTEX is looking for talented individuals to join a highly technical team of forensic consultants, design engineers, construction managers, and environmental scientists.

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Contact Us

Have a question or want to speak with a technical professional?

VERTEX is a multi-discipline firm with global coverage. Our international network of resources enables us to provide multi-national clients with the most qualified local professionals who understand the culture, language, and regulatory framework.

Call Us: 888.298.5162

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Call us at 888.298.5162.

Sherwin Lisker

Construction Expert

With over 40 years of experience in the field as a General Engineering Contractor and General Building Contractor. Sherwin Lisker’s brings an array of expertise in the fields of project management, construction claims evaluation and site inspections.

Mr. Lisker’s experience includes performing due diligence, code analysis, review of construction drawings, documents, and contracts, feasibility studies, construction compliance & completion nationwide. He has a strong history in commercial construction, with involvement of over 175 commercial franchise facilities nationwide.

Litigation Experience

Designated Expert in over 50 cases
Deposed 15 times
Testified in 5 trial cases
Involved in 75 mediations

This team member is a VERTEX Affiliate Expert.

Education & Certification

California State Contractor License #489409
A – General Engineering Contractor
B – General Contracting
HAZ- Hazardous Waste
C.S.L.B. Home Improvement Certificate

ICC, Certified Building Inspector, #872911-10
IFCI, Certified Fire Code Inspector, #353180-65
ACI, Certified Field Testing Technician, #112259
Registered Environmental Assessor, # 07284


ICC: International Code Council – Certified Professional, National Chapter
IFCI: International Fire Code Institute, Certified Member, National Chapter
ACI: American Concrete Institute, Chapter Member, San Diego, CA

Expert Witness Services

Damages, Construction Defect

Standard of Care, Contractor