bob chandlerBob Chandler, the Chandler Chicco Companies founder and CEO who leads parent inVentiv Health's communications operations, said he will retire in June.

Chandler, a Burson-Marsteller alum, founded the healthcare agency in 1995 with Gianfranco Chicco, building it into a top independent healthcare PR shop with blue chip clients like Allergan and Novartis. They sold the firm to inVentiv Health in 2007 for $65M.

inVentiv, owned by private equity firm Thomas Lee Partners, said it will be "sourcing" a successor to Chandler, adding that longtime Chandler Chicco staffer Lisa Stockman, a managing director, will step into the role of president of the firm.

InVentiv tapped Chandler in early 2013 to head a revamped communications operation, including PR, policy, advertising and digital, in addition to his CCC leadership role.