1935-38 Bill Gross (Bowdoin ’37; Harvard graduate student)
1939 Charles Ruckstuhl (MIT graduate student)
1940-41 James Blunt (Bowdoin ’40)
1942-45 none (no summer program because of WWII)
1946-49 Raymond Payntor (Bowdoin ’47; Yale graduate student)
1950-51 Al Barnes (’49)
1952 Edgar Folk (professor, Bowdoin Biology Dept.)
1953-88 Chuck Huntington (professor, Bowdoin Biology Dept.)(absent 1979-80)
1979-80 Peter Cannell (Bowdoin ’76; American Museum of Natural History graduate student)
1987-2003 Nat Wheelwright (professor, Bowdoin Biology Dept.; co-director 2000-01)
2000-01; 2004-08 Bob Mauck (professor, Kenyon College)
2008-present Damon Gannon (faculty, Bowdoin College)
Note: From 1935-53, Bowdoin Biology Professor Alfred O. Gross held the position of Director, although he spent relatively little time on Kent Island.