It was that strong commitment to giving his time and skills to benefit his local community that earned him the NZDF Volunteer of the Year award for 2018.
Sergeant McKinney also raises awareness and funding for NZDF personnel and first responders who suffer from post-traumatic stress disorder and depression. In May last year he walked and cycled the length of New Zealand, with no support crew, living on the side of the road, to help raise awareness for mental health issues.
This year he walked from his home in Tutukaka to Auckland with his dog Blaze to compete in the Sky Tower Challenge, raising money for mental health charities along the way.
"I wanted to motivate others to not be scared or embarrassed about having any form of mental health issue, to put aside that stigma and to take that step towards healing," he said.
"And so I decided to take a journey, walking and cycling through New Zealand with the aim of encouraging first responders and NZDF personnel to seek professional help when they need it. I wanted to promote awareness and normalise the emotions that come with mental health issues — not to try and hide it, but to talk about it and share it."
Along the way he has spoken to a number of community groups, police teams, fire brigades and ambulance crews.
He also went to New York to support the New York City Memorial Stair Climb, climbing 80 floors in full bunker gear.
"While I was there I had an opportunity to talk to some of the men and women firefighters of the New York Fire Department about mental health, and listen to what a lot of them go through daily," he said.
"A lot of my close friends who I served with and who I volunteer with have in their own time come forward about their mental health issues. And together I have walked alongside them through their recovery. It's a slow process, but with professional help and peer support the pathway to recovery, healing and transformation needn't be a lonely one."
Sergeant McKinney is now setting up a foundation to help NZDF personnel, veterans and first responders with mental health disorders using service animals, such as dogs and horses, in stress management programmes.
"There are a lot of support groups and initiatives, but none that focus solely on the employees and volunteers of these organisations," he said.