The technical man, actually listed as an Engineer who designed and maintained the vehicles, and wore specs, was called (Brains). He was not a member of the Tracy Family but clearly a contracting employee and cast member.
The Fabulous Thunderbirds was created in 1974.
Thunderbirds machines was created in 1965.
Carolina Thunderbirds was created in 1982.
Brains - Thunderbirds - was created in 1965.
Seattle Thunderbirds was created in 1977.
UBC Thunderbirds was created in 1915.
Toyama Thunderbirds was created in 2007.
Vancouver Thunderbirds was created in 2005.
The Hood - Thunderbirds - was created in 1965.
Albuquerque Thunderbirds was created in 2005.
Albuquerque Thunderbirds ended in 2010.
The Production Budget for Thunderbirds was $55,000,000.