Complex sentence: By June 1947, he switched jobs and started working at Hugh Breeding Inc., a firm he would serve at for almost the next twenty years as a Leased Operator, owning his own 46-foot, 5,700 gallon tank truck and leasing it on jobs.
Split into simpler sentences: By June 1947, he switched jobs and started working at Hugh Breeding Inc., a firm he would serve at for almost the next twenty years. Crim would work for Breeding as a Leased Operator, owning his own 46-foot, 5,700 gallon tank truck and leasing it on jobs.