Afterward, he continued at MIT as a postdoctoral fellow under Dr. Elliott's guidance, where he investigated sulfur-containing emissions from coal combustion and metallurgical plants.
Sadrnezhaad began his academic career in 1979 as Chief of Metallurgical Engineering (Jefe de Ingeniería Metalúrgica) at HYL Tecnología in Monterrey, Nuevo León, Mexico, where he worked for six months following his postdoctoral research at the Massachusetts Institute of Technology (MIT).
From 1992 to 1995, he was chairman of the Medical Engineering Group at the Janbazan Bioengineering Research Center, and from 1993 to 1995, he served as the dean of graduate studies at the Sharif University of Technology.
Sadrnezhaad's research interests encompass a wide range of topics in materials science and metallurgy, including the production, characterization, and medical applications of bionanomaterials and Nanomaterials.
His research also includes the extraction of rhenium, molybdenum, vanadium, nickel, magnesium, and manganese, along with environmental control in metallurgical industries.
His work in direct smelting, steelmaking, and nodular cast iron production with DRI has advanced understanding in these areas, as well as the microalloying of steel with elements like V, Nb, and Ti.
Additionally, he has contributed to research on dephosphorization and desulfurization of steel, as well as the study of sulfur emissions from coal combustion and pyrometallurgical furnaces.
His work also covers the vaporization of residual elements from nonferrous mattes and slimes, and the kinetics of leaching of molybdenum oxide and sulfide concentrates.