Charles Easmon attended Epsom College and qualified with an M.B.B.S, M.R.C.S. and L.R.C.P. from St Mary's Hospital Medical School in 1969. Between 1975 and 1976, he qualified with an MRCPath and a PhD, and in 1981, Easmon gained an M.D.
After qualifying as a medical doctor, Easmon specialised in Medical Microbiology and in 1976 was appointed as the senior lecturer at St Mary’s Hospital Medical School in addition to being an honorary consultant at St Mary’s hospital. In 1980, Easmon was appointed a Reader in Bacteriology and became the head of the Medical Microbiology department at St. Mary's Hospital Medical School. Easmon was the first Clinical Director of Pathology in 1989 at St Mary's Hospital and became Dean of Postgraduate Medicine in the University of London.
In 1995, Easmon was appointed as the Director of Education and Training for North Thames and he was responsible for the Education and Training levies and the education Consortia in North Thames. In 2003, Easmon became professor of health policy at the Thames Valley University and retired in 2010 after being appointed emeritus professor. Easmon was a Founding Fellow of the Academy of Medical Sciences.