Winnefeld's military lineage extended to his father and grandfather who both served in the Navy. His great-grandfather was a Prussian cavalryman. While at Georgia Tech, he was a member of the
Pi Kappa Alpha fraternity. After designation as a
naval aviator, he served with two fighter squadrons and as an instructor at the
Navy Fighter Weapons School (TOPGUN). While an instructor at TOPGUN, he worked with crew from
Paramount Pictures on the production of the movie
Top Gun. Winnefeld went on to graduate with the highest distinction from the
U.S. Naval War College off-campus program. He is a recipient of the Admiral
William J. Crowe Award as
Joint Staff Action Officer of the Year and the Vice Admiral
William W. Behrens Jr. award as the honor graduate of his class at
Nuclear Power School. His command tours include
Fighter Squadron 211 (VF-211), and as the 17th commanding officer of the . He led
Enterprise through her 18th deployment, which included combat operations in Afghanistan in support of
Operation Enduring Freedom immediately after the terrorist acts of
September 11, 2001. As commander,
Carrier Strike Group 2/
Theodore Roosevelt Carrier Strike Group, he led Task Forces 50, 152 and 58 in support of
Operation Iraqi Freedom and maritime interception operations in the Persian Gulf. He most recently served concurrently as Commander,
U.S. Sixth Fleet; Commander, Allied
Joint Command Lisbon; Commander, Striking and Support Forces
NATO; Deputy Commander,
U.S. Naval Forces Europe; and Joint Forces Maritime Component Commander, Europe. He is also a non-resident senior fellow at the
Belfer Center at the
Harvard Kennedy School. Winnefeld began speaking out on his son's opioid overdose death and advocating for awareness of the opioid epidemic. In an April 5, 2020 phone call to
White House Chief of Staff Mark Meadows, Senate Minority Leader
Chuck Schumer touted Winnefeld as a potential
COVID-19 czar to oversee the production and disbursement of medical equipment. In May 2022, Winnefeld was appointed to serve as chair of the
President's Intelligence Advisory Board. == September 11 attacks ==