Exhibit 21.1

List of Subsidiaries

The following is a list of the Company’s subsidiaries and their jurisdiction of formation as of March 12, 2012:

Entity	Jurisdiction
C/S Solutions, Inc.	California
Deltek Asia Pacific (HK) Limited	Hong Kong
Deltek Australia PTY LTD.	Australia
Deltek België BVBA	Belgium
Deltek Business Solutions A/S	Denmark
Deltek Danmark A/S	Denmark
Deltek GB Limited	United Kingdom
Deltek Nederland B.V.	Netherlands
Deltek Netherlands B.V.	Netherlands
Deltek Norge AS	Norway
Deltek Sverige AB	Sweden
Deltek Systems (Canada), Inc.	Canada
Deltek Systems (Colorado), Inc.	Wyoming
Deltek Systems (Philippines), LTD.	Virginia
Deltek Systems U.K. Limited	United Kingdom
Deltek U.K. Limited	United Kingdom
Deltek US, Inc.	Delaware
FSI Holdings, Inc.	Virginia
INPUT, Inc.	Delaware
mySBX Corporation	Delaware
SIRA, LLC	Delaware
The Washington Management Group, Inc.	District of Columbia
WST Corporation (d/b/a Welcom)	Texas