In 1992 he co-founded a financial newsletter publishing company, whose titles included Governance and The Money Laundering Bulletin, which he sold in 1997.
[citation needed] In 2010, Ham co-wrote and presented the documentary All the Way, produced by November Films in conjunction with the Australian Broadcasting Corporation (ABC), based on his history of the Vietnam War, which won the UN Media Peace Award.
In 2013, Ham published 1914: The Year the World Ended in Britain and Australia, which won the Queensland Literary Award for non-fiction in 2014.
In 2016–17, Penguin Random House published his books Passchendaele: Requiem for Doomed Youth and Young Hitler: The Making of the Führer in Australia and Britain.
He was a regular contributor to Amazon's Kindle single platform, having published 1913, The Target Committee and, with the psychotherapist Bernie Brown, Honey, We Forgot the Kids, an examination of the state of families and childcare in the West.