noun
Refers to a person who operates, handles, or manages equipment, goods, or procedures. Often used in technical, industrial, or service contexts.
この機械の取扱者は特別な訓練を受けている。
The operator of this machine has received special training.
危険物の取扱者は免許が必要だ。
A license is required for handlers of hazardous materials.
Compound of 取り扱い (handling, operation) + 者 (person). The exact historical derivation is straightforward; the spelling 取扱者 is a common abbreviation of 取り扱い者.