Costa Mesa's finance and information technology director announced Tuesday that he is leaving the city for a private-sector job.
Bobby Young, a city employee for 13 years, has served as its finance director since August 2011.
"Thank you for the opportunity and experiences you have allowed me to gain, and I greatly appreciate the level of trust and confidence that you have always shown in me," Young wrote in his resignation letter. "I am very proud to have served our community in many ways over the last 13 years and wish you and the rest of the organization the very best in the future."
In a prepared statement, city CEO Tom Hatch said Young "has simply been an outstanding employee for the city for many years. I will miss his expertise and his positive presence on our management team. We all wish him the best of luck in his new job."
City officials are expected to name an interim finance director soon, as well as search for Young's permanent replacement.