Klein recently completed a 35-year Navy career in March 2017. As Rear Admiral Klein, she served as the SecDef’s Advisor for Military Professionalism. Klein served as Chief of Staff for the newly-created United States Cyber Command. In 2008 she served as director of operations for the Navy’s Network Warfare Command. In 2011, she commanded an American military force of five ships, 30 aircraft, and over 3,300 Sailors and Marines in combat operations in the Mediterranean Sea. She served as the 82nd Commandant of Midshipmen at the US Naval Academy, where she was responsible for 4,400 Navy and Marine Corps officer candidates. Klein flew in and commanded an aviation squadron and wing.