Harold Clossey has resigned as CEO of the Maine Development Foundation after only 13 months on the job. Clossey’s resignation was unexpected. On a Facebook post, he cited health and personal reasons.

The foundation is a nonprofit membership organization that provides research and policy ideas with the goal of fostering long-term economic growth for Maine. It is a private nonprofit, though it was created by statute in 1978.

Clossey, the former director of Washington County’s Sunrise County Economic Development Council, assumed the top job at the foundation in January 2014.

The foundation’s board expects to begin a job search immediately.