"Best Citizen of India Award” for the year 1998, awarded by Indian Publishing House, New Delhi.

“Great Achiever of India” awarded by Front for National Progress, New Delhi.

“Vijay Shree Award” awarded by India International Friendship Society, New Delhi.

“Millennium Achiever Award” awarded by International Institute of Success Awareness, New Delhi for the Outstanding Services, Contributions and Achievements in the field of Ocean Engineering.

“Hall of Fame Award: A Tribute to Achiever” awarded by International Publishing House, New Delhi.

“Lifetime Excellence Award” awarded by 21st Century Development Council, New Delhi in Nov 2000.

Supervisor of the paper titled “Vertical wall and seaside wave screens: Optimisation to reduce reflection and pressure” of Balaji, R.& Sundar, V won the Best graduate student paper competition 2001-02, American Society of Mechanical Engineers (ASME) of Ocean, Offshore and Arctic Engg Division (OOAED)

"Rashtra Pratibha Puraskar Award” by Integrated Council for Socio-Economic Progress, New Delhi in recognition of my praiseworthy services, excellent performance & memorable contribution for the overall progress of the society in Dec 2004.

“Maritime Award” for 2004-05 by Ministry of Shipping Road transport, Ministry of Shipping, Govt. of India for the research paper “Protection Measures against Erosion due to the Ocean Waves for the Highway Connecting Chennai and Ennore Ports”. Received the award on 6th April ’05 from Honourable Minister for Shipping, Road and Transport, Government of India.

“Maritime Award” by Ministry of Shipping Road transport, Ministry of Shipping, Govt. of India for the research paper titled “Tsunami wave interaction with NDBP data buoy”, Co-authored by Balaji, R. & Sannasiraj, S.A. for 2005-06.

“Honorary Doctoral Engineer” award from University of Wuppertal, GERMANY

Best paper award for the paper “Simulation of Nonlinear free surface waves” of V.Sriram, S.A.Sannasiraj and V.Sundar among papers presented in 15th IAHR-APD, IIT Madras, 7-10 Aug 2006

National Design award in Environmental Engineering-2008 from Institution of Engineers (INDIA), National Design and Research forum presented in 23rd Indian Engg Congress, Warangal, 12 Dec 2008

Best paper award for the paper “Computation of Run-up and Reflection Coefficient over a Planar Slope” of Swetha Reddy, D., Murali, K and Sundar, V. in Conf on Recent developments in Ocean Science, Engineering & Technology organized by Ocean Society of India, Andhra University, 19-21 March 2009

Distinguished membership award awarded by Asia Pacific division of International Association of Hydro-Environment Engineering Research (IAHR) in Aug 2012 in recognistion for my outstanding contribution to the Scientific activities of the IAHR APD.

JSPS fellow Japan Society for promotion of Science) March to Nov 2013.

8th APAC 2015 Best paper award in 8th APAC for the paper titled “Wave Forces on an Oscillating Water Column Device”co-authored with Prof. S.A. Sannasiraj and John Ashlin S.

'Prof. R J Garde Lifetime Achievement Award’ for the year 2018 my significant contribution in the field of Hydraulics and Ocean Engineering awarded by Indian Society of Hydraulics.

Fellow, Indian National Academy of Engineering, (INAE) from 1 Nov 2019

Distinguished Alumni Award 2022 in the category of ” Renowned Professor” from College of Engineering Guindy, Anna university

IEEE Senior member awarded by IEEE 2022

Prof. Vallam sundar prize for the best Ph. D in Ocean Engineering for the year 2022 awarded to Karthik Ramnarayan S (supervised by Prof. sannasiraj and Prof. V. Sundar) 

Fellow Member of IAHR from Aug 2023 

Hamaguchi Award for the Enhancement of Tsunami and Coastal Disaster Resilience Ministry of Land, Infrastructure, Transport & Tourism, Japan, https://www.youtube.com/watch?v=5gKKdtjiJ34   & https://www.youtube.com/watch?v=CGsA75KcH7E&t=61s

Fellow, Ocean Society of India from Feb 2025 https://studio.youtube.com/video/HE4aJZsTpnQ/edit

IAHR Honorary Membership 2025 awarded in 41st IAHR Congress in Singapore https://www.youtube.com/watch?v=80sI0GH8Ddo,    my response to this award: https://www.youtube.com/watch?v=IWrgEJ2JAfs     

DISTINGUISHED PROFESSIONAL, ALL INDIA COUNCIL FOR TECHNICAL EDUCATION, AICTE, Aug 2025