**Exhibit 31.1**

 

**CERTIFICATE OF THE CHIEF EXECUTIVEOFFICER**

 

I, the Chief Executive Officer, of Witness Systems, Inc.(the “registrant”), certify that:

 

1.                             Ihave reviewed this report on Form 10-Q of the registrant for the quarterended June 30, 2005;

 

2.                             Basedon my knowledge, this report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary to make the statementsmade, in light of the circumstances under which such statements were made, notmisleading with respect to the period covered by this report;

 

3.                             Basedon my knowledge, the financial statements, and other financial informationincluded in this report, fairly present in all material respects the financialcondition, results of operations and cash flows of the registrant as of, andfor, the periods presented in this report;

 

4.                             Theregistrant’s other certifying officer and I are responsible for establishingand maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) and internal control over financial reporting (as defined inExchange Act Rules 13a-15(f) and 15d-15(f))  for the registrantand have:

 

(a)           designedsuch disclosure controls and procedures, or caused such disclosure controls andprocedures to be designed under our supervision, to ensure that materialinformation relating to the registrant, including its consolidatedsubsidiaries, is made known to us by others within those entities, particularlyduring the period in which this report is being prepared;

 

(b)           Designedsuch internal control over financial reporting, or caused such internal controlover financial reporting to be designed under our supervision, to providereasonable assurance regarding the reliability of financial reporting and thepreparation of financial statements for external purposes in accordance withgenerally accepted accounting principles;

 

(c)           evaluatedthe effectiveness of the registrant’s disclosures controls and procedures andpresented in this report our conclusions about the effectiveness of thedisclosure controls and procedures, as of the end of the period covered by thisreport based on such evaluation; and

 

(d)           disclosed in this report any change in the registrant’sinternal control over financial reporting that occurred during the registrant’smost recent fiscal quarter that has materially affected, or is reasonablylikely to materially affect, the registrant’s internal control over financialreporting.

 

5.                             Theregistrant’s other certifying officer and I have disclosed, based on our mostrecent evaluation of internal control over financial reporting, to theregistrant’s auditors and the audit committee of the registrant’s board ofdirectors:

 

(a)           allsignificant deficiencies and material weaknesses in the design or operation ofinternal control over financial reporting which are reasonably likely toadversely affect the registrant’s ability to record, process, summarize andreport financial information; and

 

(b)           any fraud, whether or not material, that involves managementor other employees who have a significant role in the registrant’s internalcontrols over financial reporting.

 

 
| Dated: August 8, 2005 |   |   |                                                               |
|----------------------------|--------|--------|--------------------------------------------------------------------|
|                       |   |   |                                                               |
|                       |   | BY:    | /S/  DAVID  B. GOULD                                     | * * |
|                       |   |   | David B. Gould*Chairman of the Board and  Chief Executive Officer* |

 

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