Commander Sudarshan Chakrapani (Retd.), known to his students as "Chax", has a career spanning 36 years, including more than 24 years in the Indian Navy. He served aboard the submarines INS Sindhughosh, Sindhuvir and Sindhuvijay and the warships Darshak, Bhavnagar, Sindhudurg, Vindhyagiri and Kavaratti, and held staff appointments including Staff Officer (CINCAN), APAO (FOMA) and Officer-in-Charge, NOM Varuna.

A seasoned Interviewing Officer with extensive SSB experience, he knows exactly how candidates are evaluated — and he instils in aspirants the resilience they need at the SSB and beyond. His coaching record includes a long line of recommended candidates.