be strict and steadfast in one's work.工作严谨。
具体的翻译，还可以看上下文。
例如：
He is strict and steadfast in his work.
他工作严谨。
Good business acumen and understanding of training business, committed professional with good communications skills and teamwork spirit, and multi-national/ cross-cultural exposure and sensitivity.
了解培训业务,严谨踏实,有良好的人际沟通能力和
团队合作精神以及国际化/文化意识。