Matthew P. Walker (also known as the Sleep Diplomat) is a neuroscience and psychology professor and a sleep scientist. He currently teaches at University of California, Berkeley and works at Verily (Google's research organization devoted to the study of life sciences).

At Verily, he founded and is the current Director of the Center for Human Sleep Science.

Dr. Walker received his Ph.D from the Medical Research Council in London. Before that, he earned his Bachelor's degree from Nottingham University in 1996.

In 2004, Dr. Matthew Walker began teaching at Harvard Medical School. He was an instructor in psychiatry. In one experiment he conducted in October 2002, he ran a complex typing test between a group who started in the morning and a group who started in the evening, with a 12-hour time interval for each group respectively. He and his researchers found that those who were tested in the evening first and re-tested after getting a good night's sleep improved their performance significantly better without a loss of accuracy compared to their counterparts.

In August 2016, Matt Walker started working with Hello, a consumer electronics company that makes a sleep tracking device called Sense. Hello hired Matt as their Chief Scientific Officer to analyze it and improve people's sleeping habits based on the data they aggregated.

Since July 2007, Dr. Walker has been teaching at UC Berkeley. While there, he continues to research the impact of sleep on human health and disease.

Since October 2017, Dr. Matthew Walker has been working at Verily, one of Google's research organizations devoted to the study of life sciences. He works as a sleep scientist.

Dr. Walker has received numerous funding awards from the National Science Foundation and the National Institutes of Health.