GSE Systems is into the appearance of power and control. The company provides simulation software to train power plant operators, engineers, and managers. Its systems, used primarily for the nuclear power, fossil energy, and chemical industries, can also be used to test new plant systems before they are installed. GSE Systems also offers training services through a partnership with General Physics. Customers include Slovenske electrarne,American Electric Power, Emerson Process Management, Statoil ASA, and Westinghouse Electric. With international offices in China, India, Sweden, and the UK, GSE Systems generates about 70% of sales from customers located outside the US.