Founded in 1861, MMAC advocates for improving the business climate through better public policy, facilitates economic development through the expansion and attraction of capital investment and jobs, and provides the region’s best business network helping members grow their companies. MMAC’s dues paying membership in greater Milwaukee provides over 300,000 jobs, and supports a strong quality of life. Prior to being named President in 1993, he was responsible for governmental affairs, economic development and other MMAC operations.

He serves in leadership positions on two MMAC subsidiaries as a board member of the Milwaukee Development Corporation, and as president of the Regional Center, LLC. Sheehy chairs the American Chamber of Commerce Executives, the Milwaukee Economic Development Corporation, and TechStar Holding, Inc. He serves on the boards of Milwaukee College Preparatory, the Milwaukee Partnership Academy, PAVE, Wisconsin Policy Research Institute, Schools That Can Milwaukee, Milwaukee Charter School Advocates, Milwaukee Succeeds, School Choice Wisconsin, Teach for America, and as the treasurer of Summerfest. Prior to joining MMAC, Sheehy worked as a legislative assistant to F. James Sensenbrenner, Jr. in Washington D.C. He is a recipient of the Lyndon Baines Johnson Congressional internship, a Ford Foundation Fellow on Regional Sustainable Development, a graduate of the Institute of Organization Management, and a Certified Chamber of Commerce Executive. Sheehy graduated from the University of Wisconsin- Madison with a B.S. in political science and was a member of the UW’s baseball team.