[4][3][5] During the Second World War, Haward joined the Royal Air Force (RAF).
[3] In the aftermath of the liberation of the concentration camps, Haward "drew up a list of characteristics that high-ranking Nazi war criminals might display" that could be used in addition to survivors' witness testimony to identify SS officials and camp guards who had disguised themselves as ordinary soldiers or airmen; this strategy was an early example of offender profiling.
[6] Haward successfully led a campaign to allow psychologists to testify as experts in court in England; previously only medically qualified persons were allowed to testify on the "mental functioning of witnesses or defendants".
[4][5] He rose to become Professor of Clinical Psychology,[10] giving his inaugural lecture in 1979 titled "Hypnosis in the service of research".
[11] He retired from the university in 1987 and was appointed professor emeritus, but continued to work as an honorary consultant psychologist and as an expert witness.