1982 Postdoctoral Fellow, School of Earth Sciences, Flinders University
1988 Lecturer (oceanography) University of New South Wales, Canberra
1989 Chief Scientist, 2 major cruises on Australia's Oceanographic Research Vessel Franklin
1992 Senior Lecturer (oceanography) University of New South Wales, Canberra
1996 Founding Editor, Elsevier/Pergamon journal 'Marine Models Online'. 1^st Intl journal, peer reviewed interactive software
1998 Elected to international Executive, Higher Education Res & Devt Society of Australasia

2000 Senior Research Scientist (military experimentation), Defence Science & Technology Organisation (DSTO), Adelaide
2005 The Technical Cooperation Program (five eyes, US, UK, Canada, Aus & NZ) collaboration on military experimentation
2005 DSTO lead for support to Australian Defence Force domestic operations (incl ADF role in security of Melbourne Commonwealth Games, 2006)
2007-14 Head, Counter-Terrorism & Security Analysis, Counter-Terrorism Security & Technol Ctr, DSTO
2007-14 security research for Department of the Prime Minister & Cabinet, Attorney-General's Department, Border Protection Command, Customs, the Office of Transport Security & Defence, including international collaborations and invited contributions to UK, US and Canadian strategic security deliberations
2014-16 Head of Strategic Security Risk Analysis, and Head of Strategic Analysis, DSTO
2014 Australian Research Council Assessor
2016 NATO Panel ' €˜Visual Analytics for Communicating Defense Investment Uncertainty and Risk'
2018 co-Director / Principal Consultant, Innanguard Pty Ltd, security risk management company

2018 Professor, Torrens Resilience Institute, Flinders University of South Australia