noun
sedentary work; desk job
Refers to work performed while seated, typically at a desk. Often contrasted with physical or standing labor.
彼は長年の座職で腰を痛めた。
He hurt his lower back from years of sedentary work.
座職に就いてから運動不足になった。
Since taking a desk job, I've been getting less exercise.
Compound of 座 (sitting) and 職 (work, occupation). The exact historical derivation is uncertain, but the meaning is transparent from its components.