He is a Professor in the Department of Agricultural Chemistry, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh. He completed Bachelor's (Agriculture) and Master's (Agricultural Chemistry) degrees from Bangladesh Agricultural University and Ph.D. from the Faculty of Science and Technology of Keio University, Yokohama, Japan. After completing MS degree, he started his career as a "Scientific Officer" in March 1998. He later joined as a "Lecturer" in the Department of Agricultural Chemistry of BAU, Mymensingh, in November 1999. Since then, he has been engaged in teaching and research at the same institute. He has supervised the MS and Ph.D. research work of more than 50 students and successfully completed several research projects funded by different national organizations. He has published more than 95 research articles in national and international journals and participated in many national and international conferences, seminars, and workshops. His specialization is mainly in environmental geochemistry. He is also interested in Metallic pollution and remediation, Food Safety, and Plant nutrition. His researchgate profile link : https://www.researchgate.net/profile/H-Zakir.