Like the other four Troubleshooters, Timothy Ferris was an M.I.T. student that was enrolled in Jenny Swensen's advanced engineering classes. Tim and the other four Troubleshooters were the best students in her class, and sort of became friends with her over time (they sort of hung out with her when possible, to learn as much as they could). Especially once her father died.
You see, her father was developing this ultra-advanced heuristics technology in order to help mankind, and Jenny believed the man was killed for it by his employer (for holding out). She needed to break into the facility to find out the truth, and like the others, Tim decided that he had to help Jenny out (after all, the five students felt like they owed her for all her help in school).
The Troubleshooters managed to get Jenny in, and left with the late Doctor Swensen's mobile laboratory and the Mark 2 M.A.X. Armor he'd developed. Though Doctor Swensen's former employer tried on several occasions to get the equipment back, Jenny managed to keep him at bay with the help of the Troubleshooters, who were busy breaking down the M.A.X. tech all the while.
Once they figured out how it ticked, the Troubleshooters started building new applications for it; Tim's was the Fast-Back M.A.X. partial exoskeleton, which allowed him to run at incredible speeds (over 140 miles per hour)! The Troubleshooters used these suits to help Jenny out on several occasions, both before and after she was framed for murder and thrown in jail.
While Jenny was in jail, the Troubleshooters managed to foil the assassination of the British Prime Minister, who was in Boston on a Christmas visit. This angered the would be assassin, Steel Hawk, who managed to figure out who the Troubleshooters were, and decided to get even... a lot. He set traps for all the amateur techies, starting with Timothy Ferris.
Steel Hawk ambushed the man with his machine guns, and when Tim started running away with his Fast-Back on, the man launched a grenade right into his path. Not able to dodge in time, Timothy ran right into the detonating explosive, an act which trashed his legs permanently, and Steel Hawk left the burning youth for dead. However, Tim didn't die.
The authorities managed to get him to the hospital, where they amputated his legs; drastic, to be sure, but they did save his life. It is assumed that Tim eventually recovered from this and got on with his life, but his further adventures have yet to be chronicled; he and the Troubleshooters have since faded into obscurity...