About GCM Group

Clarity and credibility in construction disputes.

At GCM Group, we deliver expert witness and litigation support for complex construction disputes—helping legal teams, insurers, owners, and contractors resolve claims with defensible, data-driven analysis.

With over 20 years of construction experience—from field operations to executive leadership—we bring both practical judgment and forensic precision to every matter. Our work is grounded in industry standards and recognized methodologies, ensuring insights that stand up in mediation, arbitration, and court.

Expert Witness & Litigation Support

We specialize in:

• Schedule Delay Analysis (AACE 29R-03, MIP 3.3)

• Change Order & Entitlement Evaluation

• Cost & Damages Quantification

• Expert Reports, Rebuttals & Testimony

Our forensic process integrates contemporaneous document review, critical path and delay analysis, and modern tools—including structured data modeling and AI-assisted diagnostics—to uncover the truth in complex disputes.

Strategic Cost Management

In addition to litigation support, we assist owners and developers with proactive cost and schedule management. From early budgeting and risk reviews to vendor cost control and change management, we provide the insights needed to keep projects on track and avoid disputes before they escalate.

Our Commitment

At GCM Group, we combine expert-level judgment, advanced analysis tools, and real-world construction experience to bring clarity to both active litigation and project execution.