<ARTICLE> 5 <CIK> 0001090709 <NAME> ANTEON CORPORATION <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-START> JUL-01-1999 <PERIOD-END> SEP-30-1999 <CASH> 1,306 <SECURITIES> 0 <RECEIVABLES> 112,419 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 120,948 <PP&E> 25,741 <DEPRECIATION> 6,636 <TOTAL-ASSETS> 293,204 <CURRENT-LIABILITIES> 78,574 <BONDS> 166,940 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 178 <OTHER-SE> 47,199 <TOTAL-LIABILITY-AND-EQUITY> 293,204 <SALES> 271,317 <TOTAL-REVENUES> 271,317 <CGS> 238,717 <TOTAL-COSTS> 238,717 <OTHER-EXPENSES> 20,397 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 10,619 <INCOME-PRETAX> 4,024 <INCOME-TAX> 2,128 <INCOME-CONTINUING> 1,896 <DISCONTINUED> 0 <EXTRAORDINARY> 463 <CHANGES> 0 <NET-INCOME> 1,433 <EPS-BASIC> 0 <EPS-DILUTED> 0