Bathurst winner and former Supercars veteran Bright will be the Californian's race engineer and driver coach.
"The Super3 Series is really exciting. There’s some really strong competition, and it is going to be a really tough season," Powers said.
"I’m pumped to be able to be involved in an up-and-coming series with a lot of great talent and future Supercars prospects.
"There’s a lot of very strong teams in the field. MW Motorsport, Brad Jones Racing – there are some really great teams, including some good privateers too, so there’s no question that the competition has stepped up.
"I’m really excited because I want to be racing against the best guys at the best level. It will allow me to benchmark myself and our team.
"Racing Super3 wasn’t the original plan, but this gives me a guarantee of a couple of years in Supercars, which is a positive.
"I feel that I’m going to be much better prepared for Super2 in 2020.
"For me, the goal is to hit the ground running in Super2 next year. I feel that this new deal with ADS has turned out to be a good outcome. It means I won’t be a complete rookie in Adelaide."