Mark A. Walther serves as the Senior Procurement Executive, Chief Acquisition Officer, and Director for the Management Bureau’s Office of Acquisition and Assistance (M/OAA). He leads several hundred contracting and agreement professionals around the world to advance acquisition and assistance (A&A) reforms and initiatives critical to the implementation of the Agency's foreign assistance development goals and impacts.

Mr. Walther first joined the Agency in 1989 as a contract specialist, and has supported a wide range of bureaus throughout his career including Global Health, Eastern Europe, Economic Growth, and Democracy Conflict and Humanitarian Assistance. He became M/OAA's Deputy of Washington Operations in 2011. Throughout his career, he advanced a wide-range of improvements and capabilities such as worldwide A&A planning, public-private alliances, streamlined acquisitions, federal grants management, workforce professionalism, and stakeholder engagements.

Mr. Walther holds a B.A. in Political Science, a M.A. in International Relations and a J.D. all from The Catholic University of America.