Mark serves as Director for Harvard Global Research and Support Services, Inc. as well as Vice Provost for International Affairs at Harvard University.

As Director, Mark helps guide the activities of Harvard Global US and its affiliate organizations. The Harvard Global Board of Directors convenes biannually to review critical activity and approve financial data, including budget-setting. Some directors also sit on the local Boards of Harvard Global’s affiliate entities.

As Vice Provost, Mark oversees and works to advance Harvard University's international academic initiatives, extending the global reach of Harvard's research and teaching activities. In this capacity, Mark serves as the University’s representative in negotiating agreements with foreign governments, receiving senior-level international delegations, and representing Harvard to peer institutions and alumni worldwide. In addition, he shares responsibility for supporting the community of international students, scholars, and faculty in Cambridge and Boston, as well as for guiding Harvard's overall global strategy and sustaining its ongoing development as a global university.

Mark also serves as the Mark Schwartz Professor of Chinese and Inner Asian History in the Department of East Asian Languages and Civilizations and in the Department of History in the Faculty of Arts and Sciences.