Constable Stu Cann from Timaru was graduating to become part of the dog section for the first time, with dog Saba.
He had already fostered three police puppies, including Oza who won the National Championships last year, and gained fame more recently for donating blood to fellow police dog Kosmo, after Kosmo was stabbed.
Cann said it was a long road to joining the dog section, and he was happy to now be able to get out there and do the work.
"Safe to say I'm pretty chuffed," he said.
"When you foster dogs you take them through to a certain point and then you watch them carry on with someone else.
"But when you get through to the next part, it's very challenging but exciting at the same time.
"Very cool to see the other side and get right through it."
Cann's family were at the graduation to support him. While he admitted "you have to like dogs, put it that way", joining the dog section wasn't a hard sell.
"My son George, he's had three foster pups so he's used to it now. My fiancee Katie she works at a vet anyway, so is a bit of a dog nut.
"So very easy buy-in there.
"But mostly [Saba] is mine, and that helps us strengthen the bond. So I feed her, I take her for walks, and eventually that works out so that we have a strong bond."