Tomáš Petrášek is a researcher at the Sleep and Chronobiology Research Centre and the leader of the Sleep, Chronobiology and Behavior in Animal Models group. He studied Animal physiology - Neurobiology at the Faculty of Science, Charles University in Prague. He earned his Ph.D. in Neuroscience at the 1st Faculty of Medicine in 2014. He has been working at NIMH since 2014, and he also works at the Institute of Physiology of the Czech Academy of Science. Moreover, he teaches at the Faculty of Science, Charles University.

His scientific interests include animal models of neuropsychiatric and neurodegenerative disorders, such as schizophrenia, autism or Alzheimer's disease, and their connections with disruptions of sleep and circadian rhythmicity. He also focuses on rodent social behavior and communication, aiming at deeper understanding of their emotional states. Tomas Petrasek is also active in outreach and science popularization, including popular articles, public lectures and activities for high school students.

Tomáš Petrášek has earned the Jan Bureš Award for the best research paper on Alzheimer's disease in 2018, awarded by Alzheimer Foundation, and the Award for an outstanding work published by a young neuroscientist in years 2017–2018, awarded by the Czech Neuroscience Society and Czech Medical Association of J. E. Purkyně.

.