Sra International S-4 Registration of securities issued in business combination transactions

Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges

	Predecessor															Successor
	Fiscal Year Ended June 30,										Six Months Ended December 31,		July 1, 2011 through			July 21, 2011 through December 31,
	2007		2008		2009		2010		2011		2010		July 20, 2011			2011
	(dollars in thousands)
Earnings:
Income (loss) from continuing operations before income taxes	$	102,775	$	123,120	$	113,062	$	140,996	$	145,663	$	69,809	$	(62,317	)	$	(16,093	)
Add:
Fixed charges		14,964		21,390		21,984		18,304		19,736		9,256		1,080			56,666
Earnings (losses) adjusted   for fixed charges	$	117,739	$	144,510	$	135,046	$	159,300	$	165,399	$	79,065	$	(61,237	)	$	40,573
Fixed Charges:
Interest expense, including amortization of expenses related to indebtedness	$	35	$	3,288	$	5,104	$	1,202	$	859	$	316	$	19		$	48,947
Estimate of the interest expense component of rent expense (1)		14,929		18,102		16,880		17,102		18,877		8,940		1,061			7,719
Total fixed charges	$	14,964	$	21,390	$	21,984	$	18,304	$	19,736	$	9,256	$	1,080		$	56,666
Ratio of earnings to fixed charges (2)		7.9		6.8		6.1		8.7		8.4		8.5		-			-
Deficiency of earnings available to cover fixed charges		-		-		-		-		-		-		62,317			16,093

Notes:

(1) Half of rent expense is deemed to be representative of interest.

(2)   For purposes of calculating the ratio of earnings to fixed charges, earnings represent income (loss) from continuing operations before income taxes plus fixed charges. Fixed charges include interest expense (including amortization of original issue discount and debt issuance costs) and the portion of operating rental expense that our management believes is representative of the interest component of rent expense. The ratio of earnings to fixed charges is not presented for the periods in which earnings were inadequate to cover fixed charges. See the Deficiency of earnings available to cover fixed charges line above for the amount of the deficiency.