Osborne held academic positions in Australia, the United Kingdom, the United States and Singapore. Osborne's main historical contribution had been to synthesize the history of the region as a whole, rather than concentrate on the histories of the present-day nations.
Osborne's Southeast Asia association began in 1959 with an Australian diplomatic posting to Phnom Penh. In 1980 and 1981 Osborne advised the United Nations High Commissioner for Refugees on the Cambodian refugee problem. In 1982 he returned to Australia, working as Head of the Asia Branch of the Office of National Assessments, also serving for a year as Head of Current Intelligence.
Osborne now lives in Sydney and continues to write while consulting on Asian issues, as well as having been a series editor on the Short History of Asia Series published by Allen and Unwin.[2]
^Jill Ker Conway 'The Road from Coorain' William Heinemann 1989.
^Curtis Andressen; Milton Osborne (Editor) (2002), A Short History of Japan From Samurai to Sony (Short History of Asia series, A)Paperback, Allen & Unwin (published 2003), ISBN978-1-86508-516-6{{citation}}: |author2= has generic name (help)
^Osborne, Milton E (April 2013), Southeast Asia : an introductory history (11th ed.), Crows Nest, N.S.W. Allen & Unwin (published 2013), ISBN978-1-74331-267-4
^Osborne, Milton; Lowy Institute for International Policy (2006), The paramount power : China and the countries of Southeast Asia (1st ed.), Published for Lowy Institute for International Policy [by] Longueville Media, ISBN978-1-921004-21-6{{citation}}: |author2= has generic name (help)