Brigadier General Nixon was most recently the Chief Executive Officer of ACADEMI and Constellis, where he led the growth of one of the world's largest security firms.

Over a 29 year Army career, Brigadier General Nixon served in a wide range of assignments including seven tours in special operations units.  Since 9/11 he has spent over four years in combat including tours in Afghanistan and Iraq as the Director of Operations for Joint Special Operations Command and the Commander of the 75th Ranger Regiment. Following an assignment as the Director of Operations for United States Special Operations Command, he returned to Iraq as the Deputy Commanding General of 25th Infantry Division / Multi-National Division North, Iraq. Brigadier General Nixon participated in a number of contingency and combat operations including the invasion of Panama, Task Force Ranger Operations in Somalia, Operation JOINT GUARDIAN in Bosnia, and seven deployments to Afghanistan and Iraq. 

He is a combat decorated soldier whose awards include the Silver Star, three Bronze Stars, and the Purple Heart. After retiring from the Army in 2011, he was a Partner at McChrystal Group and subsequently the CEO for ACADEMI and Constellis Group. He is currently the CEO of Nixon Six Solutions and supports a number of veteran focused non-profit organizations including Team Red White and Blue.  He also sits on the advisory board of a number of leading companies, including BlackHorse Solutions.