Dr Arun Kumar worked as a Head, Department of Nuclear Medicine in Medanta Abdul Razzaque Ansari Memorial Weavers Hospital, Irba, Ranchi from Jan 17 to Oct 17.

He worked as Senior Resident, Department of Nuclear Medicine in Post Graduate Institue of Medical Education and Research (PGIMER), Chandigarh, India from Jan 15 to Dec 16.

He worked as Nuclear Medicine Residency (M.D.) in the Department of Nuclear Medicine in Post Graduate Institue of Medical Education and Research, Chandigarh, India from Jan 12 to Dec 14.