In 2007 Mr Workman was honoured in the Queen's Birthday Honours with a QSO.
Now retired and living in Lower Hutt, Mr Workman continues to be a prominent advocate for just, humane and effective criminal justice policies.
Victoria University Chancellor Sir Neville Jordan said yesterday Mr Workman is "highly deserving of the honour".
"Mr Workman's life-long contribution has had, and continues to have, a profoundly positive and lasting impact on New Zealand's justice system."
He was involved in establishing Justspeak, a national youth movement advocating positive reform in the criminal justice system. Sir Neville said prisoners, victims, their families, justice professionals and advocates have all benefited from Mr Workman's "intelligent and progressive work".
"Throughout his career, Mr Workman has shown incredible passion, vision and persistence. The university is proud to count him as part of its alumni community," he said.
Mr Workman was admitted to the degree of Doctor of Literature yesterday.