CEO Scott Griffith is leaving Zipcar

Scott Griffith, chief executive of Zipcar Inc., told employees that he is leaving the Cambridge-based car-sharing company that was recently purchased by Avis Budget Group for $500 million.

File photo of Scott Griffith. Photographer Scott Eells/Bloomberg.

In a memo to employees, Griffith said he would be succeeded by Zipcar president Mark Norman.

In his memo, Griffith wrote: “After a thoughtful review of the company’s needs over the next several years, I’ve concluded it’s best if I step back and give someone else the opportunity to put the pedal down and take Zipcar to the next level. This is a bittersweet decision because I don’t feel like my work here is completely done. I recently heard someone say ‘artists rarely feel they have finished a piece of work, rather at some point they simply decide put their brush down and move on to their next piece.’ I get that. It’s time to put my brush down and move on to my next piece. So as of today, I’ll be handing off our unfinished canvas to a new leader. With great excitement, I’ll be proudly transitioning the leadership of the company to Mark Norman and the team that will take Zipcar to the next level.”

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Zipcar controls an estimated three-quarters of the North American hourly car rental market, but faces increased competition from traditional rental car companies.