1. Careful, thorough, and persistent behavior or performance in fulfilling duties or responsibilities
The employee's diligent conduct earned her a promotion.
A conduta diligente da funcionária lhe rendeu uma promoção.
2. Conscientious and attentive manner of conducting oneself in professional or personal matters
His diligent conduct throughout the project ensured its success.
Sua conduta diligente ao longo do projeto garantiu seu sucesso.