[2] He began his career at Bell Labs in 1977 after graduating from Stanford.
Reiman joined the faculty of the Fu Foundation School of Engineering and Applied Science at Columbia University in 2017.
[2] Reiman received the John von Neumann Theory Prize from INFORMS in 2016.
[3][4] He was elected to the National Academy of Engineering in 2022 for his "contributions to network theory and applications in large-scale stochastic systems.
"[1] He is also a Fellow of the Institute for Operations Research and the Management Sciences (INFORMS).