Executive Council

Within the structure of the MMS Board of Directors is a core team called the Executive Council. The Executive Council is composed of 3‐5 members, including the Head of School. The Council is directly responsible for oversight and steering the direction of the school. They meet weekly to prioritize areas of development and innovation, direct economic policy and provide board leadership

Executive Council



Jivanti Rutansky, M.S.

Trustee, Board of Directors, Former Director of High School


Sadanand Ward Mailliard, B.A.

Trustee, Board of Directors, High School Faculty


Sarada Judith Diffenbaugh, Ph.D.

Trustee, President of the Board of Directors, Former Head of School


Shannon Kelly

Director of Upper School, High School Faculty, College Counselor


Supriya Mary McDonald, B.A.

Head of School, Secretary of the Board of Directors, Finance, Admissions and Development Committees, Elementary Health Education Teacher