X0306 4 2017-01-01 0 0000944480 GSE SYSTEMS INC GVP 0001477462 Sorrells Christopher D. C/O GSE SYSTEMS, INC 1332 LONDONTOWN BLVD SYKESVILLE MD 21784 1 1 0 0 Chief Operating Officer Common Stock 2017-01-01 4 A 0 44463 0 A 280644 D These shares of common stock represent restricted share units granted pursuant to a Restricted Share Unit Agreement between Mr. Sorrells and the Issuer and are subject to forfeiture. The restricted share units awarded vest in seven installments of 5,557 shares on each of the following dates: March 31, 2017, June 30, 2017, September 30, 2017, December 31, 2017, March 31, 2018, June 30, 2018, and September 30, 2018; and one installment of 5,564 shares on December 31, 2018. These restricted share units were granted to Mr. Sorrells for his services as the Chief Operating Officer of the Issuer. /s/ Chris Sorrells 2017-01-04