Services for geologic evaluations, interim executive management, and raising joint venture capital. Tulsa, Oklahoma.

Forensic analyses and expert testimony related to water and soil aspects of criminal actions, groundwater and surface water contamination, environmental malpractice, consultant oversight, property transactions, and lake level problems. Based in Williamston, Michigan.

Massachusetts firm, providing geotechnical testing services on soils, rocks, solid waste and geosynthetic materials.

Comprehensive environmental, geotechnical, earthquake, and infrastructure consulting services. Based in California.