Did his basic medical degree (MBBS- 1997) and Post-Graduation (MS (General Surgery) -2002 from Calicut and Govt Medical Colleges, one of the most prestigious medical schools in the state of Kerala, India. He obtained Diplomate of National Board (DNB) in the year 2005. Obtained Fellowship in Vascular Surgery from Sree Chitra Tirunal Institute of Medical Sciences, Thiruvanthapuram, Kerala, India in 2005. He was admitted as a Member of Royal College of Surgeon’s of Edinburgh in 2006.  He obtained advanced training in Vascular Surgery at Augusta Hospital, Dusseldorf, Germany (2006) and St.James’s Hospital, Dublin, Ireland (2008). He obtained ChM in Vascular and Endovascular Surgery from University of Edinburgh, in 2019. 

He has held following positions in Vascular Surgery since 2006. Associate Professor, MES Medical College, Perinthalmanna, Kerala, India. Visiting consultant in Vascular Surgery at Aster MIMS, Starcare and IQRAA hospitals, Kozhikode, Kerala, India.

Member of following societies and academic institutions. 
Royal College of Surgeons of Edinburgh, Society of Vascular Surgery, National Academy of Medical Sciences, Vascular Society of India, Association of Surgeons of India, Indian Medical Association. Assistant Editor, Indian Journal of Vascular and Endovascular Surgery.

• Rajendran S, Ramachandran S, Sarma PS, Unnikrishnan M. Graft patency and determinants of outcome in infrainguinal bypasses – A retrospective study. Indian J Vasc Endovasc Surg 2021;8:222-7. 
• S. Rajendran, R. Anto, H.R. Nair. Ten-year follow-up of direct interposition graft repair of Persistent Sciatic Artery Aneurysm., Journal of Vascular Surgery Cases and Innovative Techniques. doi: https://doi.org/10.1016/j.jvscit.2021.04.013. 
• Rajendran S, Ramachandran Nair H. Endovenous laser ablation of incompetent great saphenous veins with 1470 nm laser using bare-tip and radial fibers have similar short term outcomes. J Vasc Surg Venous Lymphat Disord. 2020 Dec 16:S2213-333X(20)30724-1.