Sanjay Bharwaney, codenamed Hi-Tech, is a G.I. Joe scientist.
Sanjay Bharwaney worked at Darkmatter Logic, a company contracted by counter-Cybertronian group Skywatch. In this capacity, he met the Autobots, coming to the conlcusion that they were not so bad. Bumblebee
When Skywatch was replaced with the Earth Defense Command, Bharwaney joined that organization and was stationed at the EDC's Bikini Atoll facility. Robots in Disguise season 2
After the untimely demise of David Lewinsky and the EDC's dissolution and integration into G.I. Joe, Sanjay Bharwaney became the new Hi-Tech and began operating with Talon's G.I. Joe team. Optimus Prime