Ananda Chakrabarty, Ph.D. is a Bengali American microbiologist, scientist, and researcher, most notable for his work in directed evolution and his role in developing a genetically engineered organism using plasmid transfer while working at GE, the patent for which led to landmark Supreme Court case, Diamond v. Chakrabarty.

Elmer L.Gaden, Jr has been described as "the father of biochemical engineering". A graduate of Columbia University, he wrote a dissertation that quantified the amount of oxygen necessary to fuel the fermentation process used to produce penicillin. Gaden established Columbia's program in biochemical engineering. He remained at Columbia for 26 years as a teacher, researcher, and department chair, before becoming dean of the College of Engineering, Mathematics, and Business Administration at the University of Vermont in 1974.

George Edward Davis studied at the Slough Mechanics Institute while working at the local gas works, and then spent a year studying at the Royal School of Mines in London (now part of Imperial College, London) before leaving to work in the chemical industry around Manchester, which at the time was the main centre of the chemical industry in the UK.

Alexander Fleming was a Scottish physician, microbiologist, and pharmacologist. His best-known discoveries are the enzyme lysozyme in 1923 and the world's first antibiotic substance benzylpenicillin (Penicillin G) from the mould Penicillium notatum in 1928, for which he shared the Nobel Prize in Physiology or Medicine in 1945 with Howard Florey and Ernst Boris Chain.