Dr. N N Mathur has 40 years of experience in clinical, surgical, teaching, and research in ear, nose, throat, and head & neck surgery. He worked in some of the most reputed teaching and training institutes, including Maulana Azad Medical College; JIPMER; Lady Hardinge Medical College; BPKIHS, Nepal; VMMC; and Safdarjung Hospital. He also headed two medical colleges in Delhi —VMMC and LHMC as Director and Principal, respectively.