Gse Systems (GVP) 8-K/A Financial Statements and Exhibits

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

GSE Systems, Inc.

Columbia, Maryland

We hereby consent to the incorporation by reference in the Registration Statements on Forms S-8 (No. 333-212241, 333-183427, 333-150249 and 333-138702) of GSE Systems, Inc. of our report dated April 23, 2018, relating to the consolidating financial statements of True North Consulting, LLC, which appears in this Form 8K/A.

/s/ BDO USA, LLP

July 24, 2018