Leap Wireless International Inc.'s (LEAP) Chief Operating Officer Raymond Roman stepped down, effective immediately, after joining the company in February 2011.

The pay-as-you-go wireless carrier disclosed the departure in a filing with the Securities and Exchange Commission Monday. Leap spokesman Greg Lund said Mr. Roman is leaving to "pursue other interests"--but wouldn't elaborate--and said the exit was a "mutual decision" between the company and Mr. Roman.

The company isn't planning to name a new chief operating officer, Mr. Lund said, and Mr. Roman's responsibilities have been divided up among other executives. He is stepping down as an officer immediately, and his employment will end on July 31.

When he joined, Leap said Mr. Roman would oversee the company's marketing, network operations, customer care and retention and supply-chain management.

Mr. Roman, who was 44 years old when he joined the company, will provide consulting services beginning August 1, for the remainder of the year.