DCHL chairman Graham Crombie announced the changes yesterday.
Linda Robertson, of Meridian Energy and Statistics New Zealand, and Brian Wood, formerly MWH's Asia Pacific region managing director, would join the DCHL board as directors, following a recruitment drive that attracted more than 50 candidates, Mr Crombie said.
Ms Robertson, the group manager of treasury and procurement at Meridian Energy, is also the chairwoman of Statistics New Zealand's audit and risk committee.
Mr Wood, the former managing director of MWH's Asia-Pacific region, was involved in an earlier restructure of the council's companies, which led to the formation of DCHL, in 1993.
Their recruitment came as Mr Crombie confirmed the departure of four long-serving directors of DCHL subsidiary companies - Ray Polson, Ross Liddell, John Farry and Mike Coburn.
The holding company had recruited two new directors for subsidiary companies, with two more to follow, Mr Crombie said.
Geoff Thomas, who was already a director of Dunedin International Airport Ltd, would replace Mr Farry as chairman of Taieri Gorge Railway Ltd.
Trevor Kempton, a Dunedin businessman and Otago regional councillor, would join the Aurora and Delta boards.
Mr Crombie said the new recruits would add ''valuable skill sets'' to the boards.
''We needed people that could make informed business decisions, but at the same time complement the existing skill set of the directors already around the board table,'' he said.
Mr Crombie could not be reached for further comment yesterday, but in his statement paid tribute to the ''significant service'' of the four outgoing directors.
Mr Crombie said the recruitment process was continuing to find two more directors for City Forests.