Porter worked for the National Institute for Medical Research for eleven years (1949–1960) before joining St. Mary's Hospital Medical School, Imperial College London and becoming the Pfizer Professor of Immunology.
Ia bekerja untuk National Institute of Medical Research selama 11 tahun (1949-1960) sebelum bergabung dengan Rumah Sakit St Mary, Imperial College London, dan menjadi Profesor Pfizer Imunologi.