GSE Systems, Inc. announced appointment of Mr. Thomas J. Dougherty to its Board of Directors, as an independent director, effective immediately. Mr. Dougherty has more than 40 years of experience in plant operations, management, and support of nuclear power plants, including his service in the United States Navy Nuclear Submarine program. Mr. Dougherty currently serves as the Nuclear Safety Review Board (NSRB) Chairperson at several Exelon Sites, and as a Subcommittee Chair for NSRBs at Southern Company and Energy Northwest.