(State House News Service) -- Before departing public office, Gov. Deval Patrick frequently mentioned how he hoped to return to the private sector and earn money. On Tuesday, Patrick announced he's joining Bain Capital, the company started by his predecessor, Republican Gov. Mitt Romney.

"Today, I am joining Bain Capital as a Managing Director to build a new business focused on investments with significant social Impact," Patrick wrote on LinkedIn. "We will focus on "double bottom line" investments that improve overall quality of life or that create economic opportunities in economically distressed communities. I am excited about building a business with a social mission and to be doing so with Bain Capital, a leader in both investment innovation and philanthropic and community engagement."

Bain reported that investments it expects to be made in connection with Patrick's business will be focused in the U.S., "but will not be limited by geography, and will leverage Bain Capital's network of offices and relationships around the world."

Patrick will be based in Boston.

"The business is expected to pursue investment opportunities with significant, measurable social impact in education, health, energy, environment and neighborhood development," according to Bain.