“Paul Bessire, a key figure in the [Boston-based] Institute of Contemporary Art’s new waterfront building project, will leave the museum in early August to take a senior position at the National Gallery of Art in Washington, D.C. Bessire, 43, has been the ICA’s director of external relations since 2000, overseeing the $62 million fund-raising campaign now underway to pay for a new museum under construction on Fan Pier… Bessire becomes the National Gallery’s chief development officer in September.”