SOMERSET, N.J., Jan. 21, 2011 (GLOBE NEWSWIRE) -- inVentiv Health, Inc., a leading provider of outsourced clinical development, launch and commercialization services to the global healthcare industry, today announced that it has signed a definitive agreement to acquire Campbell Alliance, a leading management consulting firm specializing in serving the pharmaceutical and biotech industries. Yesterday, inVentiv announced that it has signed a definitive agreement to purchase i3 from Ingenix.