Sanjay Kumar was one of the principal members of the Responders. A talented engineer with a Master's degree in mechanical engineering, Sanjay was responsible for a broad array of duties in the camp, including robotics maintenance and repair, salvage, and repairing any infrastructure that might be useful to the Responders' mission. Although talented, his skill had its limits, as was the case with Mama Dolce's Food Processing in Morgantown, where the aging machines could only run for a few minutes before giving up the ghost.
Elsewhere, he managed great things. At Morgantown Airport, he rigged a system that detected automatic delivery cargobots so that Responders could clear the landing zone at the Airport and receive much-needed supplies from the NCRA supply centers. He also helped rig up Steeleheart, a police protectron, for use in Morgantown to keep the peace, deal with ghouls, and maintain access to Responder caches. He was also the primary architect of the Forest Watch early warning system.
Sanjay Kumar is mentioned only in Fallout 76.