[2] In August 2019, O'Shaughnessy stirred up the military space community when he said at a defense conference that "Elon Musk’s SpaceX may have just 'completely changed our ability' to sense threats against America using satellite clusters in space" by the new technology demonstrated by SpaceX May launch of the initial group of Starlink megaconstellation.

[7] O’Shaughnessy has reportedly had a high-level role at SpaceX's Starshield defense satellite constellation.

August 2002 – June 2003, student, Industrial College of the Armed Forces, National Defense University, Fort Lesley J. McNair, Washington, D.C.[2] 13.

June 2003 – August 2004, Chief, Joint Plans and Operations, Supreme Headquarters Allied Powers Europe, Mons, Belgium[2] 14.

September 2008 – August 2009, Commander, 613th Air and Space Operations Center, Hickam AFB, Hawaii[2] 18.

August 2009 – July 2010, Vice Commander, 13th Air Force, Hickam AFB, Hawaii[2] 19.

April 2012 – August 2013, Deputy Director for Politico-Military Affairs for Asia, Joint Staff, the Pentagon, Washington, D.C.[2] 21.

August 2013 – October 2014 – Director for Operations, Headquarters, United States Pacific Command, Camp H.M. Smith, Hawaii[2] 22.