Gary M. Birk, P.E.

Managing Partner

Gary is a founder and Managing Partner based in North Carolina with more than three decades of experince in soil and groundwater remediation.  

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Aaron Archibald

Partner

Aaron is a founder and partner based in Ontario, Canada.  Aaron oversees strategic partnerships while coordinating between our regional account managers and technical experts to ensure the development and delivery of appropriate action plans and solutions to clients.

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John Archibald, P.Eng

Partner

As a professional engineer, John brings over 35 years of corporate management and international experience, having lived and worked both in North America and overseas.

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David F. Alden, P.E.

Technical Associate

David is a Technical Associate focused on the remediation of complex soil and groundwater sites impacted by non-aqueous phase liquids.

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Sangho Bang, Ph.D.

Technical Associate

Sangho Bang, Ph.D. is a Technical Associate with Tersus Environmental, focuosed on developing surfactant formulations for Enhanced Oil Recovery (EOR) and Surfactant Enhanced Aquifer Remediation (SEAR).

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