GSE Systems, Inc. provides simulation, engineering, and training solutions and services to the nuclear and fossil power generation, oil and gas, refining, chemicals, petrochemicals, industrial gas, manufacturing, and plant utilities markets worldwide. It operates in two segments, Performance Improvement Solutions and Nuclear Industry Training and Consulting. The company offers instructors, procedure writers, work management specialists, planners, and training material developers. It also offers a software platform for online learning and learning management for the energy market. 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 1994 and is headquartered in Sykesville, Maryland.