My job is to make sure that the workers stay safe.
My work involves protecting the safety of our workers.
My responsibility is to oversee the workers' physical and mental health.
ご質問ありがとうございます。
① "My job is to make sure that the workers stay safe."＝「私の仕事は社員たちが安全であることを確認することです。」
② "My work involves protecting the safety of our workers."＝「私の仕事は社員の安全を守ることです。」
③ "My responsibility is to oversee the workers' physical and mental health."＝「私の担当は社員の身体的・精神的な健康を監督することです。」
ご参考に。
アメリカ合衆国 
