are the work of European. They reporters interviewed the designers, they all have accent European accent, I believe they are Italian. Motorweek, said the new Sting Ray is the work of an Italian, it's not American.
Tom Peters (not an Italian name) who grew up in Minneapolis was the Design Director of the 2014 Stingray. From a Forbes article...
“His father had not one, but two ’63 split-windows,” both silver, Peters says. That particular model of Corvette was the first to be called Sting Ray (written as two words in its case). It also came to be known as the “split-window,” because of its distinctive, two-piece rear window that was split down the middle.
“I knew he had two Corvettes because in one of them he had a TV installed in the center console,” Peters adds.
You can find many articles where he was interviewed and is credited with the design of the Stingray.
David Leone is Chief Engineer for Cadillac. He's an American who earned his degree in Mechanican Engineering at Oakland University and a Master of Business Administration at Wayne University. The Cadillac Design Director who oversaw the development of the CTS was Mark Adams, again not an Italian name.
If you are talking about episode 3306 that featured the CTS there is no mention of European Engineering or design duties. They say:
Inside, much like the ATS, there’s a European driver-centric layout with good attention to detail including real wood, carbon fiber, or aluminum depending on trim level.