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Our Team

David F. Alden, M. Sc., P.E. (NC)

Chief Technical Officer & Vice President of Technical Sales

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

Gary M. Birk, P.E. (NC, VA, & FL)

Managing Partner

Gary is a founder and Managing Partner based in North Carolina with forty years of experince in soil and groundwater remediation.  

Sarah Moore, M.S.

Customer Service Representative

Sarah manages logistics and customer service to seamlessly guide soil and groundwater remediation projects from start to finish.

Sherri Scott

Director of Client Success & Operations

Sherri is Director of Client Success & Operations focused on customer care and business development.

Hands-on technical support—from project planning through field implementation and performance monitoring.

Experience Behind Every Project

Tersus Environmental brings together experienced professionals in remediation engineering, technology development, project support, logistics, and client service. Our focused team works directly with consultants, contractors, site owners, and regulatory stakeholders to help move remediation projects from initial evaluation through implementation and performance monitoring.

Clients benefit from direct access to knowledgeable decision-makers who understand the technical and practical challenges of field implementation. Our capabilities include enhanced bioremediation, in situ chemical reduction, surfactant-enhanced remediation, amendment delivery, CSIA, molecular biological tools, and contaminant mass-flux measurement.

We also collaborate with trusted technology partners and specialized professionals to provide the right expertise for each project—without adding unnecessary layers or complexity.

Have a challenging remediation project?
Let our team help evaluate the site conditions and identify practical next steps.