Rex Tibbens is stepping down as chief operating officer of Lyft by year-end, Axios has learned from multiple sources. Tibbens, who joined the ride-hail company in 2015 after four years at Amazon and over a decade at Dell, has not yet decided on his future plans.

Why it matters: Lyft reportedly wants to go public next year, but first will need to fill this new hole in its senior executive team.

Below is an email sent on Monday evening by Lyft to company employees, following Axios' inquiries:

Team,

We wanted to share a note of thanks to Rex and provide a leadership team update. After 2+ years with Lyft, helping grow the business over 10x, Rex has decided that at the end of the year he will move on from his role as COO. In the new year, he'll spend time advising companies, reacquainting himself with his family, and figuring out what's next for TRex. He's been an incredible partner helping bring Lyft to every state, and launching strategic initiatives like Express Drive and our Nashville support center.

To lead the charge for Lyft's next phase of growth, we're underway with the search for our next COO. We're extremely thankful for the impact Rex has had on all of us, and excited by the opportunity to bring in new leadership to drive forward our next chapter.

Thanks,Logan & John