Andrew's expertise includes groundwater remediation, stormwater treatment and best management practice (BMP) design, source control investigations, microbiology, bioremediation and chemical oxidation treatment technologies, remedial investigation and feasibility study development, and preparation of work plans and technical reports. Andrew has broad knowledge of cost-effective treatment technologies and BMPs for groundwater and stormwater management, and is currently working with the University of Texas at Austin to research novel technologies for managing and treating bio-fouling in water supply wells.

Andrew is an active member of GSI's Safety Committee and leads employee safety training modules.