[1][2][3][4][5] Between 1986 and 1998, Klingberg was managing director of engineering firm Kinhill Ltd.[6] Klingberg is also a former director of Codan Ltd, Barossa Infrastructure Ltd,[7] Snowy Hydro Ltd and former chair of the Premier's Climate Change Council in South Australia.
Klingberg was a director of Eyre Iron Pty Ltd, when it sought to develop the Fusion Magnetite Project circa 2011-13.
[9] Klingberg is a patron of the Cancer Council of South Australia and the St Andrew's Hospital Foundation.
[10] Klingberg has been highly decorated by the Australian Government for his service to engineering, the education sector, public policy and infrastructure development.
Klingberg received a Centenary Medal in 2001 for "service to Australian society in civil and mining engineering",[11] was made a Member of the Order of Australia in 2003 for "contributions to the tertiary education sector and through engineering projects designed to improve infrastructure and services"[12] and was made an Officer of the Order of Australia in 2009 for "service to the tertiary education sector as a contributor to governance policy, and to commercial and economic development and infrastructure projects".