ESA was founded in California in 1969, shortly before enactment of the National Environmental Policy Act (NEPA) and the California Environmental Quality Act (CEQA) landmark laws that have greatly influenced environmental planning and analysis.

Over the years ESA has grown into a broad-based environmental consulting company with a nationwide presence and wide range of planning, management, documentation and analytical services. The firm's seasoned staff helps clients define environmental and planning parameters, identify opportunities and constraints, and save resources, time and money.