noun
stagehand; backstage crew
Refers to a person who works behind the scenes in a theater, handling sets, props, lighting, or other stage operations.
彼は劇団で舞台係りをしている。
He works as a stagehand in the theater company.
舞台係りが素早く大道具を片付けた。
The stagehands quickly cleared away the large props.
裏方 is a broader term for any behind-the-scenes worker, including stagehands, but can also refer to support staff in non-theater contexts. 舞台係り specifically denotes a stagehand in a theatrical setting.
Compound of 舞台 (butai, 'stage') and 係り (kakari, 'person in charge'). The reading ぶたいがかり reflects rendaku voicing of かかり to がかり.