Shake Shack operates restaurants in 16 states.

NEW YORK — Zach Koff has been named the first chief operating officer of Shake Shack Inc. Jeff Uttz will retire as chief financial officer in 2017, the company announced Jan. 5.

Zach Koff, new c.o.o. of Shake Shack

Founded in 2004, Shake Shack operates restaurants in 16 states and the District of Columbia, as well as in international markets, serving premium fast-food fare. Mr. Koff joined Shake Shack in 2010 and has held various roles, including director of operations, vice-president of operations and senior vice-president of operations. Previously, he held numerous operations roles at Bravo Brio Restaurant Group.

“I am beyond proud of Zach’s leadership over the last six years,” said Randy Garutti, chief executive officer of Shake Shack. “He has built the team and systems that run our restaurants today and has been at the foundation of Shake Shack’s unique and powerful people culture. I’m thrilled for Zach to move into the c.o.o. role and further his impact around the greater strategy and execution of our rapid growth ahead.”

Jeff Uttz, c.f.o. of Shake Shack

Mr. Uttz, who became c.f.o. of Shake Shack in 2013, will remain in his role through mid-March to oversee the company’s fiscal 2016 reporting period. The company will initiate an immediate search to fill the position. Prior to joining the company, Mr. Uttz was c.f.o. of Yard House, a subsidiary of Darden Restaurants, Inc.

“On behalf of myself, our board and all of our team members, I wish to thank Jeff for his many contributions during his time at Shake Shack,” Mr. Garutti said. “Jeff set a very high standard leading Shake Shack through its I.P.O. and beyond, and we will now search for a new c.f.o. to help guide us through what will be an unparalleled period of growth for our company.