February 09, 2000 Securities and Exchange Commission Washington DC 20549 Gentlemen: Pursuant to the requirements of the Securities Exchange Act of 1934 we are transmitting herewith the attached Schedule 13G amendment. Sincerely, Calvin S. Koonce Schedule 13G/A (Amendment No. 4 ) VSE CORPORATION IRS NUMBER 540649263 COMMON STOCK CUSIP 918284100 ITEM #1 NAME OF REPORTING PERSON S.S. OR IRS NUMBER OF ABOVE PERSON Calvin Scott Koonce ###-##-#### ITEM #2 NOT APPLICABLE ITEM #3 SEC USE ONLY ITEM #4 CITIZENSHIP OF PLACE OF ORGANIZATION US/Maryland ITEM #5 SOLE VOTING POWER 433,611 ITEM #6 SHARED VOTING POWER 2500 ITEM #7 SOLE DISPOSITIVE POWER 433,611 ITEM #8 SHARED DISPOSITIVE POWER 2500 ITEM #9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 436,111 ITEM #10 NOT APPLICABLE ITEM #11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 19.94% ITEM #12 TYPE OF REPORTING PERSON IN/IA After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. /s/ Calvin S. Koonce February 09,2000