The British manufacturer's president and CEO Andy Palmer said he was “encouraged” by the direction of the 2021 engine plans that were unveiled by F1 bosses last month.
Ross, who worked for Ferrari as head of engine mechanics and then head of base engine between 2004 and 2007, joined Aston Martin in August but has since been moved to focus on the car maker's F1 concept.
He will team up with Luca Marmorini, who held the same role as Ross at Ferrari during the mid- to late-1990s, and was previously taken on by Aston Martin as a consultant.
That role has now been made permanent.
“I've engaged Luca full-time now to help us with developing the concept engine,” Palmer told Autosport.
“I've got Joerg Ross, he's already working for me on our internal engine development and is ex-Ferrari Formula 1. He will work on the F1 project.
“So I've got two good people now to start thinking about our concept.”
Palmer said Marmorini has already started working on Aston's F1 concept and hoped his experience in the championship will help Aston in the long term.
“Luca started his concept thoughts just last week so it's fairly early days,” he said.
“But he's a good guy to have onboard and lucid about who he thinks we should work with, who we could work with, from his experience what didn't work so that will save us time.”
While the independent manufacturers were in favour of the 2021 engine proposal, F1's existing manufacturers were less so.
“I'm surprised they have been as vociferous as they have been because I think it was pretty well signalled within those meetings,” said Palmer.
“I don't know whether they feign surprise. I don't think it was a huge surprise.
“In those meetings, you had the incumbents and you had the challengers. The challengers are aligned and the incumbents are aligned.
“But everyone around the room accepted that the sport is broken. And we need to bring back the entertainment.
“The entertainment is about drivers racing, it's not about the heat recovery on an engine.”