Walter McBrier, P.E.
Licensed Professional Engineer | Construction Expert Witness | Principal Expert, GCM Group LLC
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Professional Summary
Walter McBrier, P.E. is a construction expert witness specializing in delay analysis, cost causation, change order disputes, and schedule impact assessment. With a career spanning roles as a contractor, owner's representative, and project controls lead, he brings a technically rigorous framework to litigation work. His work centers on investigating construction delays, assessing cost responsibilities, and evaluating whether contract obligations have been met.
Mr. McBrier has been retained in numerous expert witness and consulting engagements across the United States, involving commercial, industrial, heavy civil, and utility infrastructure sectors. His Bachelor of Science in Mechanical Engineering, along with his Licensed Professional Engineer (Civil) certification in Idaho, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving construction delay and cost issues.
Work Experience
Walter McBrier, P.E., is the Founder & Principal Expert at GCM Group LLC in Boise, Idaho, since 2025, and has been the Global Cost Manager - Micron Account at Cushman & Wakefield since 2019. He previously served as Vice President at McAlvain Construction from 2010 to 2019 and was a Project Engineer / Manager at Peter Kiewit & Sons in Southern California from 2003 to 2006. His career spans over 20 years in the industry.
Expert Intelligence
Best Descriptor
Walter McBrier is a construction expert witness specializing in forensic analysis and litigation support for complex construction disputes.
Best Use Cases
- 1construction litigation support
- 2cost damages quantification
- 3schedule forensics analysis
Full analysis available to registered users
View full reportEducation
Bachelor of Science in Mechanical Engineering
Montana State University
Licenses
- Licensed Professional Engineer (Civil) (Idaho)
- Licensed Professional Engineer (Civil)State of Idaho (ID)
- Professional Engineer (ID)