Meet Our Management Team

The people who drive Greentree have between them accumulated hundreds of years of experience in business and computer technology. They share an obsession with all facets of business processes, and ways to make them function more smoothly, so businesspeople can spend less time pushing paper and more time thinking of ways to become more profitable. These are some of our people, and their stories.

Greentree WE3

"Technology changes rapidly; dramatically, who knows what it will be like in 10 years' time? But whatever happens, Greentree will be there."

Peter Dickinson
Greentree International

Graham Hill

Graham Hill - Channels Director

(20 years business & technology, 25-plus years shooting hoops)

Graham is the vital connection between Greentree's partners and customers. More than 40% of our revenue goes into research and development - on business software tools, not fancy toys. Our reinvestment is huge because the landscape is always changing, and bringing in the revenue to finance that reinvestment is Graham's primary role.

"To be blunt, my job is to feed the machine, grease the wheels, get the money through the door," he says.

When he's not toiling on our behalf, Graham is a keen sportsman - he sits on the board of Auckland Basketball.

His business philosophy is simple: "to have fun engaging with people while shooting the winning baskets".

Cameron Hallmark

Cameron Hallmark - Chief Product Officer

(20-plus years in ERP, forever loving the Hawks)

Cameron has worked closely with hundreds of businesses across many different industry sectors in the UK, USA and Australia. He knows what makes them tick well, and brings this deep understanding to ensuring that Greentree's products deliver the best solutions.

He does this by always keeping in the back of his mind three key questions: "Is it a good thing? Are people going to use it? What does it need to do?"

Despite his "galactic" work experience, Cameron is a Melbourne boy from head to toe. His two obsessions outside of work are his home team (Jane, Michael and Lauren) and his Aussie Rules football team, Hawthorn ("'Fan' is not a strong enough term - I'm a fanatic!").

Diego Abrianos

Diego Abrianos - Software Development Manager

(15+ years in Enterprise technology)

In joining Greentree’s R&D management team, Diego takes primary responsibility for the ongoing roll out of Greentree4 and its new browser-based, mobile capability.

Hailing from Brazil, Diego is fluent in Portuguese and English and admits to a workable knowledge of Spanish. Sporting a range of degrees including an MBA in People Management, Postgraduate Diploma in WEB and Information Systems and Bachelor in Computer Science he also is a certified scrum master and has completed some diverse and interesting courses including “O.O. Analysis, UML and Rational Rose” through to “Managing and Developing Star Technologists”. “Having solid skills on technology, process and people is the essential tripod to successfully drive software delivery…have made that my professional motto.”

Having spent eight years working for HP in Brazil, Diego made a considerable contribution to that organisation in his time including leading the implementation of a range of software related practices across the organization and contributing to the development of 15+ releases of mission critical HP products. Since arriving in New Zealand in 2011 he has taken leading technology development roles with Turners Auctions and fleet solutions company, Imarda.

When not working, Diego loves to travel and getting to know different people and cultures as well as enjoying time with family. Just as he enjoys rolling up his sleeves in the office, you’re also more likely to find him on the sports field or up a mountain as opposed to standing on the side line watching others do it. “Love the thrill of exploring new places and of challenging my own limits and fears.”

And in the United Kingdom: 


Harry Mowat


(20 years software, 12 years business software, 40 years mad on cars)

Harry's outstanding track record in developing partner networks across Europe, the Middle East and Africa made him the perfect fit when Greentree went looking for someone to run its UK office. The British market is a tough environment, but Harry is quite at home in the Land of the Giants.

"Every partner is different, but having managed relationships with the likes of IBM, down to the smallest of resellers, it all comes down to two things: having a great product to sell and nurturing a close relationship with your partners, based on trust, friendship and team work," he says.

"At last in my career I have found both - A great product in Greentree and some very focused and very successful partners to work with, many of whom I consider to be great friends."

For recreation, Harry turns into a petrol-head. He's nuts about cars and motor racing.


“It’s amazing to think there’s a company like Greentree, on the other side of the world, thinking light years ahead of what businesses might need in the future.”

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