For Watene Kuka and Joel Marshall, their training in road crash rescue, compartment fires, intensive First Aid, urban situations and bushfire fighting was coupled with the demands of a newborn child.

The pair - both living in Launceston - were among the 15 in their group to reach graduation on Friday, to join the ranks of the Tasmania Fire Service ahead of another summer fire season.

Mr Kuka, who welcomed Aria into the world, had spent seven years as an offshore oil and gas search and rescue team member off the Northern Territory coast before deciding to make the switch to the TFS.

He said it had been a challenging few months, but he was looking forward to his new career in Tasmania.

"I really enjoy this type of emergency-style of work, where I'm not in an office from 9 to 5," Mr Kuka said.

"The instructors have given us everything they can, they've prepared us as well as they can. The training doesn't stop here, it's a career job.

"We both had newborn babies while doing the course, so that was challenging, but rewarding as well."

Mr Marshall was the dux of the course, and was also able to celebrate the birth of his baby, Sonny.

He had previously worked as a plumber and gas fitter for 14 years before seeking out a career where he could give back to the community.

"I wanted to join the TFS to do something to make a positive impact in the community. It's a great organisation and a great group of people where I can make that impact in the lives of people around me," Mr Marshall said.

"My wife's father had been a firefighter in the Northern Territory for 30 years, and over the past few years he'd been planting the seed in my head, saying that it was a great job, so I looked into it and agreed.

"The TFS was really awesome in supporting us with our children coming in during the course."

Of the 15 new firefighters, six will be stationed at Launceston, five at Hobart, two at Devonport and two at Burnie.