PWA Joins ESA - ESA acquires Philip Williams & Associates, a 40-person environmental hydrology firm based In San Francisco.  
ESA welcomes Bobbette Biddulph - Biddulph named Southern California Regional Director.  
SFPUC Water System Improvement Program EIR wins national award - ESA's work receives planning integration honor at 2010 NAEP conference.  
A Work of Art - ESA's EIR featured in national exhibition.  
 
Our Work

ESA specializes in all aspects of project planning, environmental analysis and assessment, natural resource management and regulatory compliance. With diverse practice groups and multiple offices nationwide, the firm is able to pull together nimble, multidisciplinary teams with project-specific expertise at the local level.
 
The firm's core services are: 


Federal and state environmental compliance

Regulatory permitting and compliance monitoring



 
Clients may use individual services, or work with one of our practice groups, which serve similar projects and clients. For more information on our what distinguishes us from other firms see our corporate brochure.

Federal clients may take advantage of our GSA contracting vehicle, to save time and procurement costs.
 
 
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