But he said credit for his honour must also go to all the teams he had led and also to his wife — the couple celebrate their 50th wedding anniversary next year.
''I was surprised (when told he had been awarded the honour) and it was completely unexpected,'' Mr Dark, an engineer who has also worked in the aerospace industry, said.
''We came here (to New Zealand) for two years and we're still here. We have no regrets whatsoever. New Zealand is one of those places where there is no class system - unlike in the UK - and if you are prepared to work hard there's nothing to stop you achieving.''
He said part of his success was being able to gather together great teams.
''That is essential. I've managed to get great leadership teams at all the businesses I've been involved with. It started in Taranaki (working on the gas turbine Stratford power station from 1976) where I built a really good team right through Fletcher Challenge to Port Corp and NorthTec.
''So the teams really should take the credit, I've just been the captain and it's about motivating staff so that they come to work to do a great job. It's important that they trust you and you trust them, and I'm very fortunate to have built very good teams around me. Annette has very much been a big part of my team all along.''