After his initial employment training he remained with the 5/7 RAR (Mech) where he was promoted to Lance Corporal and then Corporal before going on a further posting to Depot Company, The Royal Australian Regiment (1991). In 1994 he was promoted to Sergeant and was posted to the 6 RAR as a Platoon Sergeant. In 1996 he was posted to the 4/3 RNSWR as a Training Sergeant.

In 1998 he returned to Depot Company RAR as a Platoon Sergeant. During his posting to the School of Infantry he was selected to serve with the Multinational Forces and Observers in the Sinai (2001). On return from the Sinai he was posted on promotion to 1 CSSB in Darwin as a Training Warrant Officer. It was during his time in Darwin that he was selected to deploy in 2004 as part of the first Australian Army Training Team Iraq (AATTI).

In 2005 he was posted to the 1 RAR where he served as the Company Sergeant Major of Charlie Company and Support Company. In 2006 was selected for a two year accompanied posting to the Infantry Battle School as an instructor with the Small Arms School Corp at the Infantry Battle School, Brecon, Wales, UK.

Before returning to Australia he was promoted to Warrant Officer Class One. He assumed the position of OI Range Qualification Team, at the School of Infantry where he served for 2 years. It was during this posting that he learned of his appointment as the Regimental Sergeant Major, 5 RAR (Mech). In December 2010 WO1 de Kock deployed to Afghanistan as RSM of the 2nd Mentoring Task Force. In July 2011 he returned to Darwin and continues as RSM of 5 RAR. This appointment is a career highlight for Warrant Officer de Kock and he is extremely honoured to serve with such a fine unit.

Warrant Officer de Kock is married to Kelly and they have two children, Maddison (18) and Jayden (16). He enjoys watching rugby and V8 supercars. He is also a keen pistol shooter and enjoys fishing when the opportunity is available.