Robert Samuel Langer, Jr. FREng (born August 29, 1948 in Albany, New York) is an American chemical engineer, scientist, entrepreneur, inventor and the David H. Koch Institute Professor at the Massachusetts Institute of Technology. He was formerly the Germeshausen Professor of Chemical and Biomedical Engineering and maintains activity in the Department of Chemical Engineering and the Department of Biological Engineering at MIT. He is also a faculty member of the Harvard-MIT Division of Health Sciences and Technology and the David H. Koch Institute for Integrative Cancer Research. He is a widely recognized and cited researcher in biotechnology, especially in the fields of drug delivery systems and tissue engineering. His publications have been cited approximately 200,000 times and his h-index is 224. According to Google Scholar, Langer is one of the 10 most cited individuals in history. Langer is recognized as the most cited engineer in history. Langer's research laboratory at MIT is the largest biomedical engineering lab in the world, maintaining over $10 million in annual grants and over 100 researchers. In 2015, Langer was awarded the Queen Elizabeth Prize for Engineering, the most influential prize in the world for engineering.
Langer was born August 29, 1948 in Albany, New York, USA. He is an alumnus of The Milne School and received his bachelor's degree from Cornell University in chemical engineering. He earned his Sc.D. in chemical engineering from MIT in 1974. His dissertation was entitled "Enzymatic regeneration of ATP" and completed under the direction of Clark K. Colton. From 1974–1977 he worked as a postdoctoral fellow for cancer researcher Judah Folkman at the Children's Hospital Boston and at Harvard Medical School. Langer credits Folkman as a fantastic role model. Langer and his wife, Laura, a fellow MIT graduate, have three children.