This question is your chance to let the employer know about some of your greatest achievements, and you don't even have to worry about whether you sound like you're bragging! What you choose will reveal a lot about your values, what you're passionate about and what gives you satisfaction, so give your answer some thought.
For some, their proudest accomplishments might be an award won for exceptional performance, or getting recognition from the team for a job well done. Or maybe it could be a particularly challenging project at work which you managed to complete, or having increased your company’s revenue or improved its systems, making you feel that you had made a valuable contribution.
Others may take pride in more interpersonal achievements, such as having mentored a new team member, or helping someone with a challenging task. It really doesn’t matter what you choose, as long as you can explain why it gives you a sense of satisfaction and pride in what you have done.
The accomplishments you’re most proud of will tell your interviewer about what’s important to you and therefore what kind of environment you will thrive in. Some people need public recognition for their achievements, while for others it’s more about setting and fulfilling personal goals and standards. Whatever it is, it's important that you demonstrate the high standards you set for yourself. Companies generally like high achievers who are driven by a personal drive to excel, rather than those that are motivated by outward glory.