He was a founding member of the Society for Commercial Archeology, a preservationist group.
Krim has taught at the Boston Architectural Center, Clark University, and Salve Regina University, and has consulted for the Cambridge Historical Commission, Massachusetts Historical Commission and others.
[1] In 2016, he was an advocate for designating the Boston Citgo sign, which The Atlantic called "one of the hub's best known pieces of technology" but was threatened with dismantling, as a historic landmark.
[2] The Boston Globe referred to Krim as "the sign's unofficial historian".
B. Jackson prize of the American Association of Geographers for the best book in cultural geography in 2006.