(Thomas) Michael Dexter FRS (born 15 May 1945)[1] is a British haematologist and director of the Wellcome Trust, from 1998 to 2003.

[2][3][4] Dexter was inspired to take A levels at night school[5] and went on study physiology and zoology at the University of Salford.

After graduating, he continued in academia and received a PhD from the University of Manchester in 1974 for research into Leukemia.

[1] Dexter was visiting fellow at the Memorial Sloan–Kettering Cancer Center and a professor of haematology at the University of Manchester from 1985 to 1998.

[9] He has authored over 360 articles in scientific journals including Nature[10][11][12] and is an editor of four books.