Dr. Dhar is a board-certified pediatric dentist serving as clinical professor and department chair of Orthodontics and Pediatric Dentistry and graduate program director of Pediatric Dentistry at the University of Maryland School of Dentistry, Baltimore, USA. He serves on the Councils on Scientific Affairs and Post-Doctoral Education at the American Academy of Pediatric Dentistry (AAPD), the Council of Scientific Affairs, American Dental Association (ADA), and the Scientific Committee International Association of Paediatric Dentistry.

He currently serves on the ADA guideline panels on restorative care and caries prevention and has in the past served on the pit and fissure sealants panel. He also is on the AAPD guideline panels on vital pulp therapies in primary and immature permanent teeth and behavior guidance and has in the past served on the AAPD panel to produce clinical practice guidelines on non-vital pulp and vital pulp therapies in primary teeth.

Dhar is the recipient of the 2018 ADA Evidence-Based Dentistry Mid-Career Faculty Award and the 2017 AAPD's Jerome B. Miller/Crest-Oral-B/For The Kids Award. He also is a co-author on the manuscripts that were selected for the Paul P. Taylor Best Manuscript Award in 2016, 2017, and 2020.