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GSE was established in 1991 with the goal of providing engineering and environmental compliance services. Today, our company has grown to provide full service environmental, engineering, compliance and field services. GSE is a leader in environmental compliance, GeoProbe® services, stormwater pollution prevention, wetlands delineation, site investigations, and remediation services. GSE's success in meeting the needs of our clients is demonstrated by our excellent performance history. We enjoy repeat business with over 90% of our clients.