GSE Systems, Inc. engages in the provision of professional and technical engineering services, staffing services, and simulation software to clients in the power and process industries in the United States, Asia, Europe, and internationally. It operates in two segments: Engineering and Workforce Solutions. The Engineering segment provides various technical engineering services for ASME programs; and simulation software and services, including operator training systems for the nuclear, fossil fuel power generation, and process industries. The segment also offers in-service testing for engineering programs focused on ASME OM code; in-service inspection for specialty engineering including ASME Section XI; software solutions; mechanical and civil/structural design; electrical, instrumentation, and controls design; digital controls/cyber security; and fire protection solutions for nuclear power plant design modifications. The Workforce Solutions segment supports project lifecycles and provides technical talent and specialty services comprising professional and training services, procedure writing services, and flexible staffing and talent acquisition services for energy, engineering, construction, government, infrastructure, environmental, and manufacturing industries, which include reactor operations instructors, procedure writers, project managers, engineers, work management specialists, planners, and training material developers. The company markets its products and services through a network of direct sales staff, agents and representatives, and strategic alliance partners. GSE Systems, Inc. was founded in 1971 and is headquartered in Columbia, Maryland.