John Gretton "Jocko" Willink (born September 8, 1971) is an American author, podcaster, and retired United States Navy officer who served in the Navy SEALs.
His military service included combat actions in the Iraq War, where he commanded SEAL Team 3's Task Unit Bruiser, the unit that fought in the battle against the Iraqi insurgents in Ramadi. Willink was honored with the Silver Star and Bronze Star Medal for his service. He achieved the rank of lieutenant commander.
Willink co-authored the books Extreme Ownership and The Dichotomy of Leadership (with fellow retired SEAL Leif Babin) and co-founded the management consulting firm Echelon Front, LLC. Willink hosts a weekly podcast with Brazilian jiu jitsu practitioner Echo Charles, called the Jocko Podcast.