Pushpesh Ranjan, born in Sathi village, district West Champaran (Bihar). Currently, he is working as an Assistant Professor at B. V. Raju Institute of Technology, Narsapur, Telangana, India. He completed his B. Sc. (Chemistry Honours) from Babasaheb Bhimrao Ambedkar Bihar University, Muzaffarpur (Bihar) in 2013. He earned his M. Sc. in Chemistry from Dr. Harisingh Gour Vishwavidyalaya (A Central University), Sagar (MP) in 2017. In March 2024, he graduated with a Ph.D. in Chemical Sciences from CSIR–Advanced Materials and Processes Research Institute (AMPRI), Bhopal, under the guidance of Dr. Raju Khan (Senior Principal Scientist). He has gained extensive expertise in electrochemical biosensors for point-of-care diagnosis of cancer biomarkers and infectious diseases. He also worked as a Postdoctoral Fellow at the CSIR-AMPRI, where his research focused on the design and development of efficient non-noble metal-based electrocatalysts for the  Hydrogen Evolution Reaction (HER) and Oxygen Evolution Reaction (OER). He worked as a Post Doctoral Fellow at the Indian Institute of Technology, Gandhinagar, under the guidance of Dr. Biswajit Saha, and his research focuses on the design and development of electrochemical bio(sensor) for the detection of cancer biomarkers, heavy metals, pesticides, and infectious diseases.