William R. Dahlgren

American Battlefield Trust operates as a heritage land protection organization. It also engages in the preservation of the history of American Civil War battlefields. It provides the Hallowed Ground quarterly membership magazine, classroom resources, special events, battlefield interpretation, and landscape restoration and upkeep. The company was founded in 1999 and is headquartered in Washington, DC.

Part of Aalberts NV, AirTech, Inc. is a company that produces actuators and accessories. The company is based in St. Louis, MO. The CEO of the company is Jeffrey L. Dahlgren. AirTech was acquired by Aalberts integrated piping systems Americas, Inc. on December 03, 1998.

Airtech International, Inc. manufactures nylon film, vacuum bagging rubber, infusion mesh, peel ply, release film, breather, sealant tape, and all vacuum connections. Its services include custom products and kitting, training, and technical support. The firm's product line include vacuum bagging films, pressure sensitive tapes, release liquids, vacuum bag connectors and hoses, pressure pads, cutting tools, vacuum leak detectors, shrink tape, PTFE coated fiberglass, tooling prepregs and resins, and carbon and glass reinforcements. The company was founded by William G. Dahlgren in 1973 and is headquartered in Huntington Beach, CA.