WASHINGTON DC – Teri Takai will be leaving her post as the Defense Department’s chief information officer May 3. She submitted her resignation to Secretary of Defense Chuck Hagel on Monday. A replacement hasn’t yet been named.

Takai has served as the DoD’s CIO since November 2010. While in that position, she was the principal advisor to Secretary Hagel for information management, information technology, and information assurance. She also oversaw non-intelligence space systems, critical satellite communications, navigation, and timing programs, as well as spectrum and telecommunications.

Most recently, Takai was credited with replacing the DoD’s longstanding information assurance process with the National Institute of Standards and Technology’s holistic “built-in, not bolt-on,” risk-focused security approach.

Takai was the Michigan state CIO under former Gov. Jennifer Granholm, before taking the state CIO post in California. Takai was recognized as one of InformationWeek’s most influential government CIOs in 2013 for her efforts to launch several IT initiatives that cut across the military branches.

Takai’s resignation follows another executive’s departure from the Defense Department. On March 28, principal deputy chief information officer Rob Carey left for the private sector. He had served in government for more than 30 years.