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Who's Who Legal
Who's Who Legal

Global Leader

WWL Ranking: Recommended

WWL says

William McConnell is hailed as "thorough and thoughtful" and a "producer of excellent work". He is further lauded for his "on-time and amenable delivery".


William (Bill) McConnell is the co-founder and CEO of The Vertex Companies, Inc, a global, employee-owned, architectural, engineering and construction firm ( that has hundreds of employees who operate out of more than 25 offices. Vertex offers forensic, engineering, construction and environmental solutions to a wide array of clients. Bill has more than 30 years of experience in the fields of construction and engineering. He has extensive experience with large and complex international construction disputes and is a top expert witness in the US, most notably for his opinions that relate to damages, cost of repair, standard of care for a contractor, fault allocation, surety claims, termination and scheduling.

Bill has a Bachelor of Science degree in civil engineering from the University of Maine, a juris doctor degree from the University of Denver, a Master of Science degree in civil engineering from Columbia University and he is working towards his Doctor of Philosophy degree in civil engineering from the University of Colorado (anticipated graduation in 2021). Bill also completed a part-time three-year business programme at Massachusetts Institute of Technology.

Bill is a licensed professional engineer in approximately 25 states and a member of the National Council of Examiners for Engineering and Surveying. Bill holds a commercial builder’s license in many jurisdictions. Many construction, engineering, and law organisations have published Bill’s articles and reports over the past two decades, and he is a frequent presenter at organisations such as the American Bar Association; Associated General Contractors of America; American Society of Civil Engineers; American College of Construction Lawyers; and American Society of Professional Estimators, to name a few.

Bill co-founded The Vertex Companies, Inc in 1995. Vertex is consistently ranked as one of the fastest growing companies in the AEC industry. Vertex is unique because it stands behind forensic opinions based on their traditional AEC service offerings, offers superior services because of their forensic experience, and maintains an academic ethos.

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