Dr. Ajit Kumar Singh is currently working as an Assistant Professor at Amity Institute of Behavioral and Allied Sciences, Amity University Rajasthan. He is a member of National Academy of Psychology, Indian Academy of Health Psychology, and National Positive Psychology Association. He is an Editorial Board Member of the Journal of Mental Health and Behavioral Sciences. He is also a member of various committees at Amity University Rajasthan.

He has published various research papers in national and international journals and presented research papers at National and International Conferences. He has also published a book chapter and is working on two book chapters in edited books. Presently, he is working on two edited books and various other research projects. He has delivered a number of invited lectures at different institutions.

His areas of expertise are Unforgiveness, Forgiveness, and wellbeing. He has supervised more than 15 Master's and bachelor's psychology students to complete their dissertations, and presently, four doctoral students are pursuing their doctoral theses under his supervision.