From 2005 to 2008, Luo pursued postdoctoral studies at the Albert Einstein College of Medicine in the lab of Professor Vern Schramm. In 2008, Luo became a faculty member in the department of Molecular Pharmacology and Chemistry at Memorial Sloan Kettering Cancer Center. His group has pioneered the use of chemical genetic 'bump-hole' methodologies to identify the substrates of protein methyltransferases, an approach that requires engineering these enzymes to use a non-natural S-adenosyl methionine analogue as a cofactor. Luo's lab also has contributed to the development of new chemical probes of protein methyltransferases, enabling their function to be probed in vitro and in cells.