Harold jumped at Missoula during the 1946-47 seasons.

From research it is possible that this is the Hackman that was a smokejumper:

Harold Eugene Hackman died, 45, September 27, 1969, in Missoula, Montana. Born September 28, 1923, in Petaluma, California, and moved to Missoula as an infant. He served in WWII as a CPL in the Army Air Corps and in the USAF during the Korean War. He married June Phelps in Missoula in 1951 and worked as a logger for the John J. Hogan Logging Co.