**Exhibit      31.1**

**CERTIFICATIONS      **

**Certification      Pursuant to Rule 13a-14(a) of the Exchange Act **

|  1.  | I                  have reviewed this annual report on Form 10-K of inVentiv Health,                  Inc.; |
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|  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 with respect to the period covered                    by this                    report; |
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|  3.   | Based                    on my knowledge, the financial statements, and other financial                    information                    included in this report, fairly present in all material respects                    the                    financial condition, results of operations and cash flows of                    the                    registrant as of, and for, the periods presented in this report; |
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|  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: |
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|   |  (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;  |
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|   | (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; |
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|   |  (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 |
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|   |  (d)  | Disclosed                            in this report any change in the registrant's internal                            control over                            financial reporting that occurred during the registrant's                            most recent                            fourth fiscal quarter that has materially affected, or                            is reasonably                            likely to materially affect, the registrant's internal                            control over                            financial reporting; and |
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|  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 the registrant's                    board of directors (or persons performing the equivalent function): |
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|   |  (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 |
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|   |  (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. |
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| February              28, 2007 | By:                                       | /s/ ERAN              BROSHY                                         |
|                           | Eran              Broshy        |
|                           | Chairman              & Chief Executive Officer |