Chemical plant and system operators perform work familiar to some military personnel.

Jobs in this career are similar to the following job classifications in the

740B
Electrolytic Oxygen Generator (Model 6L16) Operator/Mechanical Maintainer (Enlisted)
Q53A
Low Pressure Electrolyzer (LPE) Operator (Enlisted)

The following military occupations are no longer in active use:

4252
Electrolytic Oxygen Generator (Model 6L16) Operator/Mechanical Maintainer (Enlisted)
4253
Low Pressure Electrolyzer (LPE) Operator (Enlisted)
4254
Oxygen Plant Operator/Maintenance Technician (Enlisted)