Ex-Fonterra chief executive Andrew Ferrier is joining the board of New Zealand's largest privately-owned software exporter.
Ferrier is also taking a "significant" stake in Orion Health through his family investment company, Canz Capital Ltd.
Orion Health chairman Andrew Clements said the company was delighted to welcome a person of Ferrier's calibre as a director and investor.
"As we continue to push the business globally, Andrew Ferrier's expertise and capabilities and international perspective will be invaluable."
Orion Health recorded a 30 percent increase in operating revenue for the first six months of the 2012 financial year. It recently won large electronic healthcare system contracts in Australia, Singapore and the US.
Ferrier, who stepped down from Fonterra in September, said he was attracted to Orion Health for its growth potential, arising from a leading position in a number of major markets, and as one of the few New Zealand companies capable of scaling to become a true multinational.
"Orion Health is already a New Zealand success story in the local business landscape and in the global health technology industry," he said.