Hired by Brun Technics on graduation, he worked on both the EuroBrun F1 team and the 1990 design of the Judd-powered Brun C91 sports car. In 1991 he was hired as aerodynamicist on the Allard J2X-C sports car, and subsequently worked on Indycar development for Newman-Haas, Lola Cars and Swift Engineering.
In 1995 he moved to Formula1 with Jordan Grand Prix as an aerodynamicist, becoming chief aerodynamicist in 1998. In 2002 he followed Mike Gascoyne to Renault F1, and then joined Ferrari in 2004 as chief aerodynamicist.
- Noble, Jonathan. "Caterham F1 team lays off over 40 members of staff in restructure". autosport.com. Retrieved 5 July 2018.
- "McLaren aero man Iley heading to Caterham - Pitpass.com". www.pitpass.com. Retrieved 5 July 2018.
- Young, Byron (27 November 2011). "McLaren: Lotus blow no big deal for 2012". mirror.co.uk. Retrieved 5 July 2018.
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