Dr. Rajan has worked in some of the top hospitals in India and abroad, including Kerala Institute of Medical Sciences (KIMS) Trivandrum, Ananthapuri Hospitals and Research Institute (AHRI), and the Sabah Al Ahmad Cardiac Center, Al Amiri Hospital, Kuwait. He has also been associated with various research projects in cardiology, and has published several research papers in national and international journals.

Dr. Rajan's expertise lies in the diagnosis and treatment of various cardiovascular diseases, including coronary artery disease, heart failure, arrhythmias, hypertension, and valvular heart disease. He has a special interest in 3D Echocardiography and complex coronary interventions.

Dr. Rajan is known for his patient-centric approach and his ability to provide personalized care to each of his patients. He believes in building strong relationships with his patients and their families, and works closely with them to develop a treatment plan that is tailored to their specific needs.

In addition to his clinical practice, Dr. Rajan is actively involved in teaching and training young cardiologists. He has been a faculty member for several national and international conferences and has conducted numerous workshops and training programs in cardiology. Dr. Rajesh Rajan has held several academic appointments. In 2017, he was appointed as the supervisor of the undergraduate medical research program (SSS) of the Royal College of Surgeons of Ireland and as the supervisor of the undergraduate medical clinical placement program (PY2CP) at the University of Reading, United Kingdom. In 2019, he was appointed as a visiting lecturer at the Medical Institute of RUDN University.

The National Pharmaceutical Pricing Authority (NPPA) has called a high-powered meeting on February 6, 2018, to revisit the pricing of cardiac stents. Dr. Rajesh Rajan was invited by the NPPA as the president of the Indian Association of Clinical Cardiologists and one of the seven committee members. As a result of this meeting, the historical price caping decision on cardiac stent prices was taken and implemented, which later on helped many poor and needy patients. The NPPA has also asked for the prices of catheters, balloons, and guide wires to be mentioned separately in hospital bills.

Dr. Rajan's journey to becoming a renowned cardiologist began in the quiet town of Adoor in Kerala, India. After completing his early schooling at Holy Angels, Adoor, and later secondary level at Mar Ivanios College, Thiruvananthapuram. He went on to pursue his passion for medicine. In 2003, he graduated in medicine from RUDN University. This was followed by a fellowship in Cardiovascular Surgery from Bakulev Scientific Center of Cardiovascular Surgery in 2005. He did his Compulsory Rotating Resident Internship (CRRI) from the Government Medical College, Thiruvananthapuram. He then obtained a Postgraduate Diploma in Clinical Cardiology from Kerala Institute of Medical Sciences (KIMS) and a Ph.D in cardiology from RUDN University. In addition he hold a FRCP in cardiology from Royal College of Physicians London, Edinburgh, Glasgow and Ireland. He has been a fellow of the European Society of Cardiology, the American College of Cardiology, and American Heart Association.

Dr Rajesh Rajan is happily married to Nidhi Radhadevi Mohan and they are blessed with two wonderful children. Their firstborn, Krish Balram Rajesh, is a charming young boy who brings joy to their lives. Their second child, Nathan Krishnan Rajesh, is a sweet little boy who is adored by everyone in the family. Dr Rajesh and Nidhi are proud parents who are committed to providing their children with the best possible upbringing. They are a loving family who enjoy spending time together and making precious memories that will last a lifetime.

Overall, Dr. Rajesh Rajan is a highly respected and experienced cardiologist who is committed to providing the best possible care to his patients. His expertise, patient-centric approach, and dedication to the field of cardiology make him a valuable asset to the medical community.