Dr. Ramesh was former professor and head of Dermatology & STD in Vardhman Mahavir Medical College & Safdarjang Hospital. Interests range from tropical infectious dermatoses, particularly those of national importance like leprosy, cutaneous tuberculosis and leishmaniasis, and dermatopathology.

The articles in cutaneous tuberculosis have brought out important facts relating to treatment, diagnosis and emergence of drug resistant tubercular skin infections. Similarly he has been continuously working in post-kala-azar dermal leishmaniasis, a neglected tropical dermatosis and contributed much to it.

Currently he is Professor and Head in the Department of Dermatology & STD Hamdard Institute of Medical Sciences and Research.