Experience
Capt (Dr) Sunil Tyagi: thirty-two years of commissioned naval service (1992–2024), as a marine engineer and submarine designer, including six years as Head of the Acoustic Stealth Group at the Directorate of Submarine Design; founder and principal of Oravont Systems LLP, a defence R&D practice in Noida, India, registered on 29 November 2024.
Download CV (PDF)Capt (Dr) Sunil Tyagi, Indian Navy (Retd), is the Founder and Principal of Oravont Systems LLP, Noida, which works on underwater acoustics, acoustic stealth and AI for passive sonar. He was commissioned in the Engineering Branch of the Indian Navy in 1992 and headed the Acoustic Stealth Group of the Navy's Submarine Design Directorate. He holds a PhD from the Defence Institute of Advanced Technology, Pune, on artificial intelligence for machinery condition monitoring. He was a Senior Fellow at the Centre for Air Power Studies from 2022 to September 2024. His current research is on passive-acoustic vessel classification and re-identification (arXiv:2609.07399).
Oravont Systems LLP · Noida
Defence R&D practice in Noida, India, with three tracks: passive-sonar AI for underwater domain awareness, deep learning for underwater acoustics, and underwater acoustic stealth engineering for submarines and surface ships. Current engagements include work as technical partner to an industry participant in iDEX DISC5 Challenge 10 (iDEX: Innovations for Defence Excellence; DISC5: Defence India Startup Challenge 5; Indian Navy, Underwater Domain Awareness; programme active, Oravont’s part winding down), an exploratory research collaboration with IIT Delhi in association with a DRDO/NSTL programme (Defence Research and Development Organisation / Naval Science and Technological Laboratory), and iDEX open-challenge proposals as Principal Investigator. The NCIIPC (National Critical Information Infrastructure Protection Centre) Startup India AI Grand Challenge (PS12), in which Oravont was technical partner to an industry participant, concluded in May 2026. See Projects.
Centre for Air Power Studies · New Delhi
Final appointment before retirement. Led research on AI in naval and joint-force warfare, including a study for HQ Integrated Defence Staff on exploiting AI and autonomous / unmanned systems for joint combat power. Edited a book on quantum computing and helped work out the solutions to its questions; authored two book chapters spanning AI in future warfare and quantum sensing and communication.
Naval Trials & Acceptance Authority (NATAA) · Mumbai
Led acceptance and performance-refinement trials for new-construction ships and submarines prior to delivery to the Navy; specialist advice on noise-ranging and acoustic-stealth enhancement, benchmarking design limits against measured trials data.
Directorate of Submarine Design, Naval Headquarters
Defence Institute of Advanced Technology (DIAT), Pune · Military Institute of Technology (MILIT), Pune
Taught Marine Gas Turbines, Warship Transmission & Tribology, Mechanical Vibration Laboratory, Artificial Intelligence, MATLAB, CAD and FEA. Guided seven M.Tech dissertations; awarded Best Instructor (MILIT, 2014).
Indian Navy
Engineering appointments afloat and ashore: operation, maintenance and design of marine propulsion, power-generation and auxiliary machinery; Engineer Officer aboard warships; dockyard management at Naval Dockyard, Visakhapatnam; instructor at INS Shivaji (2003–2005).
Defence Institute of Advanced Technology (DIAT), Pune, 2018. Hybrid AI approach (discrete wavelet transform, DWT; support vector machine, SVM; artificial neural network, ANN) for machinery fault diagnosis; one patent (Indian Patent 373427, “Bearing Fault Detection”, as named inventor; patentee DIAT Pune) and eight publications.
University of Pune, 2002.
G.B. Pant University of Agriculture & Technology, 1991.