Douglas C. McVarish has been employed as an architectural historian by John Milner Associates, Inc. since 1992. He currently is Principal Architectural Historian and Associate and works in JMA's Philadelphia office. He holds a BA degree in American studies from Hampshire College, a Masters of Planning degree from the University of Virginia and a M.S. degree in historic preservation from the University of Vermont. He has surveyed and documented many industrial structures and landscapes including two slackwater navigation corridors, aluminum industry facilities of western Pennsylvania, a Maryland mine fan complex, many bridges, several electrical generating stations, a shipyard, a sanitary pottery, a forge, and several airports.