Commander Greig is originally from Ravenna, Ohio. He enlisted in the Navy in 1991 as a Seabee Utilitiesman (UT) and served in Naval Mobile Construction Battalion TWENTY (NMCB-20) while attending The Ohio State University and participating in the Naval Reserve Officers Training Corps (NROTC). In 1996, he graduated with a B.A. in History and received his commission as a Surface Warfare Officer.
CDR Greig’s operational tours include Division Officer assignments onboard USS SIMPSON (FFG-56) in Norfolk, Virginia and USS MOBILE BAY (CG-53) in Yokosuka, Japan and San Diego, California. His Department Head assignments were as Weapons Officer and Combat Systems Officer onboard USS MONTEREY (CG-61) in Norfolk. He later served as the Officer-in-Charge of Maritime Expeditionary Security Squadron THREE (MSRON-3) Detachment Bahrain where he was responsible for the conduct of OPERATION VIGILANT MARINER embarked security team missions in the Arabian Gulf.
Ashore, CDR Greig studied at the Naval Postgraduate School in Monterey, California where he earned a M.A. in National Security Affairs specializing in Far East Asia. While there, he also completed his Joint Professional Military Education (JPME) Phase I requirements through the Naval War College. As an Antiterrorism and Force Protection (ATFP) Specialty Career Path Officer, CDR Greig served as the Deputy Force Antiterrorism Officer for Navy Expeditionary Combat Command (NECC).
Most recently, CDR Greig served as a Planner on the staff of the International Security Assistance Force (ISAF) Joint Command in Kabul, Afghanistan. In this assignment, he focused on civil-military affairs and the transition of Afghan provinces from ISAF to local control.