Large firms aiming to innovate or achieve a degree of agility increasingly look for outside help. Catalant has placed itself at the crux of this dynamic by offering a project management software platform and staffing marketplace for harnessing the skills of internal and external personnel. Cofounders, co-CEOs, and HBS alums, Rob Biederman and Pat Petitti talk about the company’s evolution and how it’s providing clients regular insights into their most strategic work.