Ajar Nath Yadav is an Assistant Professor (Senior Scale) and Assistant Controller of Examinations at Eternal University, Baru Sahib, Himachal Pradesh, India. He has 8 years of teaching and 12 years of research experiences in the field of microbial biotechnology, microbial diversity and plant-microbeinteractions. He obtained his doctorate degree in Science (Microbial Biotechnology), jointly from Indian Agricultural Research Institute, New Delhi and Birla Institute of Technology, Mesra, Ranchi, India; M.Sc. (Biotechnology), from Bundelkhand University and B.Sc. (BCZ) from University of Allahabad, India. Dr. Yadav has 245 publications with h-index 65, i10-index 184, and 11500 citations (Google Scholar –on 03/03/2022). Dr. Yadav is editor of 31 books (Springer, Elsevier, Wiley, Taylor and Francis). Dr. Yadav published 131 research communications. In his credit one granted patent “Insecticidal formulation of novel strain of Bacillus thuringiensis AK 47”. Dr. Yadav has got 19 Best Paper Presentation Awards, and one Young Scientist Award (NASISwarna Jayanti Purskar). Dr. Yadav received “Outstanding Teacher Award” in 6th Annual Convocation 2018 by Eternal University, Baru Sahib, Himachal Pradesh. Dr. Yadav has a long standing interest in teaching at the UG, PG and PhD level and is involved in taking courses in agriculture microbiology, bacteriology, biosystematics and biodiversity, bioprocess engineering and technology, environmental biotechnology, environmental microbiology, industrial microbiology, microbial biotechnology and techniques in microbiology and biotechnology. Dr. Yadav is currently handling two projects one funded by Department of Environments, Science & Technology (DEST), Shimla and one by HP Council for Science, Technology & Environment (HIMCOSTE). Presently he is guiding 05 scholars for PhD degree and 01 for M.Sc. dissertations. In his credit ~6700 microbes (Archaea, bacteria and fungi) isolated from diverse sources and ~550 potential and efficient microbes deposited at culture collection National Bureau of Agriculturally Important Microorganisms (NBAIM), Mau, India. He has deposited 2386 nucleotide sequences and 03 whole genome sequences (Bacillus thuringiensis AKS47, Arthrobacter agilis L77 and Halolamina pelagic CDK2) and 02 transcriptome to NCBI GenBank databases: in public domain. The niche-specific microbes from extreme environments were reported as specific bio-inoculants (Biofertilizers) for crops growing in normal and diverse abiotic stress conditions. Dr. Yadav and group have developed technology for screening of archaea for phosphorus solubilization for the first time. Dr. Yadav is editor-in-chief for "Journal of Applied Biology and Biotechnology". Dr. Yadav is Editor/Associate Editor for Frontiers in Microbiology, BMC Microbiology [Springer-Nature], BMC Biotechnology [Springer-Nature], Annals of Microbiology [Springer-Nature], Current Microbiology [Springer-Nature], Plant Science Today and Microbial Biosystems. He has been serving as reviewer for 76 different national and international peerreviewed journals and reviewed 276 manuscripts. He has the lifetime membership of Association of microbiologist in India, Indian Science Congress Council, India and National Academy of Sciences, India.