Denis is a National Director of Colliers International. Having completed over 36 years in the property industry, Denis is an industry leader in the management of major assets and portfolios for Global and Australian institutions, Federal and State Governments, Developers and Private Investors. 

Denis has specialised in the planning, leasing, commissioning, management and sale of major commercial, industrial and retail projects.

Denis is the chair of the Property Council of Australia’s Professional Development Committee and, since 1997 has been involved with a range of state and national committees and industry conferences.

He has also been a member of the judging panel for the Property Council of Australia/Rider Levett Bucknall Innovation and Excellence Awards since 2006 and awarded Life Membership of the Property Council Academy in 2019.