The IMS Board of Trustees is comprised of current parents, alumni, and local community members. The board members are elected by the IMS community, serving staggered terms of 3 years. The Board of Trustees is responsible for the financial management of the school and all large scale fiscal and policy decisions.

All decisions related to the educational programs, faculty and school management are made by the Executive director in concert with the Board. The Board meets monthly and meetings are open to the IMS community.