InVentiv Health Inc. (NASD: VTIV) said third-quarter revenue in its clinical segment -- which includes clinical research staffing and outsourcing -- fell 4% on a year-over-basis to $53.8 million. Lower demand for permanent placement and contract staffing led to the decline, the company said.

Companywide third-quarter revenue at inVentiv fell to $270.5 million from $289.2 million in the same period last year. Net income fell 11.8% on a year-over-year basis to $11.9 million.

InVentiv also announced that President and Chief Operating Officer Terry Herring will resign effective Dec. 31.

InVentiv provides pharmaceutical and healthcare services.