Brigadier Rob Krushka enlisted into the New Zealand Army in January 1989 and underwent officer training at the Officer Cadet School (NZ), Waiouru.
He graduated in December 1989, into the Royal New Zealand Corps of Transport, and over the next twelve years undertook a number of regimental appointments; including a tour of duty in Antarctica as a Detachment Commander and a deployment to East Timor, with the 4th New Zealand Battalion Group, as the Officer Commanding Combat Services Support Company.
In January 2004, Brigadier Krushka was posted to Headquarters Joint Operations Command, Sydney Australia as the Staff Officer Grade Two Logistics Operations and Plans. On return to New Zealand he assumed the appointment of Assistant Military Secretary followed by a posting to Headquarters Joint Forces New Zealand.
In December 2007, Brigadier Krushka was appointed Commanding Officer, 2nd Logistics Battalion and then Chief of Staff, 2nd Land Force Group. In April 2011 Brigadier Krushka deployed to Iraq as a United Nations Military Advisor and on return to New Zealand he assumed the appointment of Military Secretary, Army General Staff.
In August 2014, he was appointed Logistic Commander (Land). He was promoted to Brigadier in March 2017 and appointed Commander Logistics, Defence Logistics Command.
He assumed his current appointment as Chief Joint Defence Services in November 2019.
Brigadier Krushka is a graduate of the New Zealand Defence Force Command and Staff College (Dux) and the Dwight D. Eisenhower School for National Security and Resource Strategy (Distinguished Graduate). Brigadier Krushka holds a Post Graduate Diploma in Arts (Distinction), Master of Business Administration and a Master of Science in National Resource Strategy (Distinguished Graduate).
In March 2006, Brigadier Krushka was awarded an Australian Defence Force Deputy Chief of Joint Operations Commendation for his role in ADF support to the 2004 Boxing Day Tsunami and in June 2006 he was appointed as a Member of the New Zealand Order of Merit.