"I operate small PEFC-certified spruce forests in Europe as well as a eucalyptus and pine [pinus radiata] forest in South America."
The Programme for the Endorsement of Forest Certification is a leading global alliance of national forest certification systems.
"As an international non-profit, non-governmental organisation, we are dedicated to promoting sustainable forest management through independent third-party certification."
Leitner also has dairy farms in Europe and Chile and wished to invest in dairy farming in New Zealand but said under strict rules he is unable to.
Leitner said he has known about the forestry industry in New Zealand for a long time with his company Andritz - of which he is CEO - supplying products to New Zealand companies and utilities. It is a global leader for hydro power and pulp production equipment.
"Above all New Zealand is a fantastic country with very likeable people.
"I plan to spend time there to explore more of its beauties. This could include some moderate additions to my forestry business/hobby."
His applications were approved under a special forestry test, brought in more than a year ago, to smooth the way for more forestry investment.
"The special forestry programme encourages converting marginal farm land into pine forest and grants carbon credits against committing to long-term, sustainable forestry," he said.
"This is the reason for me acquiring the farm."
With an estimated net worth of US$1.5 billion according to Forbes, ranking 1349 on its rich list, Leitner is a chemist by training but joined Andritz in 1987, was made CEO in 1994 and bought a 26 per cent stake in the company in 1999.
He eventually turned Andritz into one of Austria's largest companies and a global giant.
Leitner comes from a somewhat modest background with his father also having worked for Andritz, serving the company for three decades as a metal worker.
His wealth stems from the sale of Pharmavit, part of pharmaceutical outfit Genericon which he founded, for $110m in 1995 helping towards his buy in to Andritz.