Exhibit 31.2  CERTIFICATION OF THE CHIEF FINANCIAL OFFICER PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002  I,
Brian J. Clark, certify that:  1.I have reviewed
this Annual Report on Form 10-K of Stanley, Inc.;  2.Based on my
knowledge, this report does not contain any untrue statement of a material fact
or omit to state a material fact necessary to make the statements made, in
light of the circumstances under which such statements were made, not
misleading withrespectto the period
covered by this report;  3.Based on my
knowledge, the financial statements, and other financial information included
in this report, fairly present in all materialrespectsthe financial condition,
results of operations and cash flows of the registrant as of, and for, the
periods presented in this report;  4.The registrants
other certifying officer and I are responsible for establishing and maintaining
disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and
15d-15(e)) and internal control over financial reporting (as defined in
Exchange Act Rules 13a-15(f) and 15d-15(f) for the registrant
and have:  a)Designed such
disclosure controls and procedures, or caused such disclosure controls and
procedures to be designed under our supervision, to ensure that material
information relating to the registrant, including its consolidated
subsidiaries, is made known to us by others within those entities, particularly
during the period in which this report is being prepared;  b)Designed such
internal control over financial reporting, or caused such internal control over
financial reporting to be designed under our supervision, to provide reasonable
assurance regarding the reliability of financial reporting and the preparation
of financial statements for external purposes in accordance with generally
accepted accounting principles;  c)Evaluated the effectiveness
of the registrants disclosure controls and procedures and presented in this
report our conclusions about the effectiveness of the disclosure controls and
procedures, as of the end of the period covered by this report based on such
evaluation; and  d)Disclosed in this report any
change in the registrants internal control over financial reporting that
occurred during the registrants most recent fiscal quarter (the registrants
fourth fiscal quarter in the case of an annual report)  that has materially affected, or is
reasonably likely to materially affect, the registrants internal control over
financial reporting; and  5.The registrants
other certifying officer and I have disclosed, based on our most recent
evaluation of internal control over financial reporting, to the registrants
auditors and the audit committee of registrants board of directors (or persons
performing the equivalent functions):  a)All significant
deficiencies and material weaknesses in the design or operation of internal
control over financial reporting, which are reasonably likely to adversely
affect the registrants ability to record, process, summarize and report
financial information; and  b)Any fraud,
whether or not material, that involves management or other employees who have a
significant role in the registrants internal control over financial reporting.  /s/
  BRIAN J. CLARKDate:
  May 21, 2009
  
  Brian
  J. ClarkExecutive
  Vice President, Chief Financial 
  Officer and Treasurer