Sean Leary

Associate Principal/VP – Transaction Risk Management
Edina, MN
About Sean

Sean Leary is an Associate Principal and Vice President of Transaction Risk Management at GZA,, as well as the head of our Minnesota office. An Environmental Professional with 18 years of environmental due diligence and remediation consulting experience, Mr. Leary joined GZA as part of Vieau Associates Inc., which GZA acquired in January 2020. Since the acquisition this office has completed over 2,500 projects, including 40 geotechnical projects – a service line it did not handle prior to joining GZA. Last summer, the Vieau Associates name was formally retired, and the office is now operating under the GZA brand while taking on new clients.

Sean serves as a national instructor and content developer for ASTM International, teaching Phase I and Phase II Environmental Site Assessment courses to a diverse profile of industry professionals and is part of a small cohort that is developing ASTM’s Certified Environmental Professional (CEP) Program.

Sean's environmental due diligence experience is extensive, including completion, management, and review of thousands of Phase I ESAs and hundreds of Phase II Investigations spanning over 35 states. His due diligence consulting expertise also includes review and management of hundreds of Property Condition Assessments (PCAs) across the nation. He also served on the Environmental Bankers Association (EBA) Board of Governors from 2018 through 2023.

Sean also manages a team completing complex site investigations and remedial projects, including installation of vapor mitigation systems, underground storage tank removals, petroleum release investigation and cleanup, brownfield site investigation, cleanup, and redevelopment. Mr. Leary also has experience in the management of assessments for asbestos, mold, lead risk assessments, radon, geotechnical, stormwater, environmental compliance, and wetlands. He is well versed in risk-based site evaluation and has a demonstrated track record of securing liability assurances and regulatory approvals through State Voluntary Investigation and Cleanup and Brownfields Redevelopment programs as well securing grant awards for site investigation and redevelopment.