Besides the main campus at High Rise Building, APSRTC Dwaraka Bus Station Complex, Dwarakanagar, Visakhapatnam, SDI Visakhapatnam has set up 2 extension centres inside Rajahmundry & Visakha Central Prions. Training is being given to inmates of both the prisons in the courses manual metal ARC welding or industrial welder (O&G) and Plumber (General). Besides these courses training is being given to both male & female inmates in the course jute products stitching operator in Visakhapatnam Prison.