Knowles, who will report to INDYCAR's Vice President of Technology Will Phillips, will work in developing the rules and performance standards for the three IZOD IndyCar Series engine manufacturers beginning in 2012.
"Trevor's primary role will be to monitor all engine manufacturers' performance and competition for the 2012 INDYCAR program and beyond," Phillips said. "This will ensure they are competing within the rules defined by INDYCAR. I'm happy to have someone of Trevor's experience join the team."
Knowles has an extensive motorsport background with experience in INDYCAR, NASCAR and Formula 1. He worked with Penske Racing and Evernham Motorsports in NASCAR and also worked with Honda Performance Development, helping develop the 2003-2006 Honda Indy V-8 engine and the Acura's P2 engine for ALMS.