A formal collocation meaning 'to devote oneself fully to X, to stick strictly to X.' [noun]に徹する = 'adhere completely to [role/mode]. 裏方に徹する ('stick strictly to behind-the-scenes').'
1 sentence
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I'd imagined — without anyone saying so — that fresh graduates would stick to behind-the-scenes work like preparing documents and making photocopies. I was gloriously wrong.