Tell Us: What’s Your Hobby or Passion Outside of Your Nonprofit Job?

During the day, Ettore Rossetti works as senior director of social business strategy and innovation at Save the Children.

But outside of work, he’s a former Guinness World Records holder.

Mr. Rossetti and his twin brother set the world record for the longest tennis volley in 2008, hitting 25,944 strokes over more than 14 hours. Since then, they’ve lost the record and in 2015 fell short of reclaiming the title.

We’re looking for more people like Mr. Rossetti: Those nonprofit professionals who have deep passions or interesting side gigs outside of their regular jobs. It may be an unusual hobby, a standout accomplishment, or work in a completely different field — anything you wouldn’t usually find on the resume of a major-gifts officer or a social worker or a youth-orchestra conductor.