I have worked with Shutter speed on a few occasions whereby I accompanied them to several race track locations around the UK. Shutter Speed is a media company that is hired by larger automotive companies to cover their photography, videography, and marketing. The larger company we were accompanying was Car Chase Hero's, a drive day provider where people can drive supercars and the cars from the movies (Optimus Prime, the Bond DB5, KIT from nightrider, etc.) 

My job was a 2 parter. I would either be taking the photographs of the clients driving, using a telephoto lens (300 or 400mm) from a distance. Or I would be selling the photographs that a different photographer took from the photo desk.