He has completed several Harvard Business School Executive Education programmes in global strategy and international finance.
"These are all important skills and experiences that we need to grow our business and our people," Roberts said.
Insley said he was looking forward to joining the company and working with the board to help map a way forward through the ever increasing challenges and complexities in the sector.
"I'm excited about the opportunity to help grow value for the organisation and the Te Arawa shareholders.
"I have a passion for Maori development including growing assets and people in a truly sustainable manner. I look forward to weaving science, technology and innovation into every aspect of the organisation in order to deliver on goals of nurturing excellence and optimising operational effectiveness."
Insley will take up the role in early September.