X0101 EFFECT 33 LIVE 2012-05-14 12:00:00

S-4

0000906192 SRA INTERNATIONAL, INC. 333-180490 0001542706 Constella Group, LLC 333-180490-04 0001542707 Platinum Solutions, Inc. 333-180490-03 0001542774 Sentech, Inc. 333-180490-02 0001542708 Touchstone Consulting Group, Inc. 333-180490-01