Dr Khattar is a Urologist who has dedicated himself to the fields of Reconstructive Urology, Female Urology and Neurovesical dysfunction. He is a member of Female and Functional Urology Subspeciality section of the USI. He has been a core member for Indian guidelines committee of the Urological Society of India (USI) for Adult Urinary Incontinence and Urethral Strictures. Dr Khattar  has worked as Professor of Urology at the PGIMER and Dr RML Hospital, New Delhi where he was actively involved in teaching and research. He has more than 45 research publications to his name including seven book chapters and a book (https://www.researchgate.net/profile/Nikhil-Khattar/research). He runs The PerineoUrology Clinic at Sarita Vihar New Delhi and works as a Visiting  Consultant, Reconstructive Urology, Female Urology and Neurourology at Holy Family Hospital and National heart Institute New Delhi