David Docherty has gained experience in the resource sector commencing with stockbroking in London before commencing a career experience as an analyst with Investment Bank, Slater Walker London in 1965. He moved to Sydney in 1968 with Slater Walker to develop resource investment strategy, organising finance to enable Poseidon to drill its Mt Windarra nickel discovery in 1969, as well as financing many other resource assets of that time. That same year, Mr Docherty organised the ASX float of Slater Walker sponsored Mining Finance Corporation, becoming its managing director.
As chief executive of Sedimentary Holdings, Mr Docherty had guided the company to joint ownership and open-pit development of the old Cracow Gold Mine (Qld) from 1984 to 1987. He became an equity partner in the Thai resource sector in 1987 when the Government deregulated gold exploration and mining. In 2002, he became a foundation director and chief executive of Thai Goldfields NL, an unlisted public company which holds Thai applications (and re-applications) over gold resources defined by previous JV partners Oxiana and Tigers Realm Minerals, and exploration tenements previously investigated by Newmont, Ivanhoe, Phelps Dodge.