Phedon Tsiknopoulos, Wayne Halford, Nathan Proch, Miva Filoseta

Phedon Tsiknopoulos — Phedon J. Tsiknopoulos was a Mattel engineer from 1979 to 2006 and one of Hot Wheels' master modelmakers, joining the design team in 1985. He appears in patent information tied to the Crashers and worked on the Gyro Jets and on 1:64 scale prototypes of Cars (Disney/Pixar). After Mattel, he spent time at Spin Master and turned to woodworking. He died in 2014.

Wayne Halford — Wayne Ray Halford worked at Mattel from 1970 to the early 2000s as an engineer and is named in the patents for the Attack Pack, Crashers and other novel lines. He rarely took part in vehicle design, working on the engineering of these lines.

Nathan Proch — Nathan Proch graduated in Industrial Design (B.S.) from the University of Cincinnati in 1987 and interned at the Chrysler Design Center (Michigan) and the Chrysler Advanced Concept Studio (Los Angeles). He started at Hot Wheels in the early 2000s, creating automotive projects adapted for different media. In 2009 he was honored as a distinguished alumnus of Shenango High School and he was nominated for the Diecast Hall of Fame (2014) in the die-cast designer category.

Miva Filoseta — Miva Antonio Filoseta worked in Mattel's Hot Wheels division from 1984 to 1987 and from 1989 to 2014, mainly as an engineer, focusing on tooling, mechanical engineering and tampo design. He was responsible for adding magnets to the Rev-Ups line and for implementing the hydrographic tampo application system, first used on the NASCAR series and later on the Speed Racer series. Before that, he worked at Smith Engineering and General Consumer Electronics, on the Vectrex console. Today he is a design and engineering consultant at Spin Master and a development and tooling consultant at Bonfit.