Steven's own career included 13 full-time Supercars seasons with his father's eponymous team, which operates today under majority ownership from US giant Team Penske.
“Jett understands motorsport. He knows what needs to be done for him to succeed in motorsport,” said Steven.
“He knows what we do is on a budget. It's about having fun and doing it together, but it's also about learning along the way.
“If you get a trophy along the way that's a bonus, but it's all about making sure that we can go out and learn a lot and have a great time; work more towards what he wants to do as a race driver in the future.”
Jett completed his first test in a racesuit donated by ex-Dick Johnson Racing driver John Bowe, who remains a close friend of the family.