Exhibit 31.2


Certification of J. Stuart Moore Pursuant to Section 302 of the Sarbanes-Oxley
Act of 2002

The undersigned hereby certifies that:

      1. I have reviewed this Quarterly Report on Form 10-Q of Sapient
Corporation;

      2. Based on my knowledge, this Quarterly 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 with respect to the period covered by this
Quarterly Report;

      3. Based on my knowledge, the financial statements, and other financial
information included in this Quarterly Report, fairly present in all material
respects the financial condition, results of operations and cash flows of
Sapient Corporation as of, and for, the periods presented in this Quarterly
Report;

      4. Sapient Corporation's other certifying officers 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)) for Sapient Corporation and we
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 Sapient Corporation,
      including its consolidated subsidiaries, is made known to us by others
      within those entities, particularly during the period in which this
      Quarterly Report is being prepared;

            (b) evaluated the effectiveness of Sapient Corporation's disclosure
      controls and procedures and presented in this Quarterly Report our
      conclusions about the effectiveness of the disclosure controls and
      procedures, as of the end of the period covered by this Quarterly Report
      based on such evaluation;

            (c) disclosed in this Quarterly Report any change in Sapient
      Corporation's internal control over the financial reporting that occurred
      during Sapient Corporation's most recent fiscal quarter that has
      materially affected, or is reasonably likely to materially affect, Sapient
      Corporation's internal control over financial reporting; and

      5. Sapient Corporation's other certifying officers and I have disclosed,
based on our most recent evaluation of internal control over financial
reporting, to Sapient Corporation's auditors and the Audit Committee of Sapient
Corporation'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 Sapient Corporation'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 Sapient Corporation's
      internal control over financial reporting.


         SIGNATURE                        TITLE                      DATE
         ---------                        -----                      ----

   /s/ J. STUART MOORE          Co-Chief Executive Officer     November 13, 2003
-------------------------        Co-Chairman of the Board
     J. Stuart Moore