After secondary school and a year studying geography at Massey University, he decided to join the Royal New Zealand Navy.
"It sounds a bit of a cliche, but I enjoyed travelling and seeing new places, and I wanted a career that provided variety and excitement," he said. "I decided the navy was a good way to achieve that."
He said it was fantastic to be back at sea after 15 years based in Wellington in various New Zealand Defence Force positions at Joint Headquarters and in Capability Branch.
While Commander Walker has previously commanded inshore patrol vessels such as HMNZS Kahu, now decommissioned, the HMNZS Canterbury is on a different scale. The RNZN support ship is a 9000-tonne, 131m multi-role vessel with the ability to transport personnel, vehicles, and supplies around New Zealand and overseas.
Highlights from Commander Walker's previous deployments include two postings as Ship's Executive Officer, on HMNZS Manawanui and HMNZS Endeavour. A five-month deployment to Asia on HMNZS Endeavour included port visits in Japan, Hong Kong, South Korea, and Australia, while he also visited Singapore with HMNZS Manawanui while taking part in exercises there.