Think of something relevant to the position you're applying for. Be sure to give a sincere answer. Discuss a recent experience that's fresh in your mind and relevant to you as a professional in the present day. Explain why the experience was rewarding. Mention work that went into the result and the impact on the company and explain how you influenced government agencies or the public. Use an example that highlights specific skills/talents, such as your ability to develop consensus within a community or crucial research findings that helped solve a water resource problem. Focus on experiences that resulted in benefits for others, such as clients, the community, or co-workers.

"One of my most recent rewarding accomplishments occurred at my last company when I was transferred to a department known for having internal conflict. This department had more turnover than the entire company. Having a reputation as friendly, approachable, and easy-going, I was successful in transforming the environment into a more pleasant place to work. During the year I worked there, retention was high. There were no transfers or resignations. I achieved this by incorporating fun into the work and increasing office morale by encouraging celebrations of individual and group successes. We even formed a walking club and got in shape during lunch breaks."