Don Buchanan serves as the Chief Internal Audit Advisor for the Cook Islands Government, supporting ministries and agencies to strengthen internal controls, develop risk-based audit plans, and enhance the performance of their internal audit functions. He provides regular reporting to the Internal Audit Committee, contributing to improved governance and oversight across the public sector.

Don is also the Chairperson of Te Aponga Uira, the Rarotonga power utility, where he has led significant governance improvements, including the establishment of the Risk and Audit Committee, the development of an updated Board Charter, and the implementation of a strengthened Health and Safety Framework. In this role, he provides strategic leadership and engages closely with key stakeholders, including the Prime Minister, Cabinet, shareholders, and the wider community.

Committed to professional excellence, Don continues to advance his governance capabilities through ongoing training with the New Zealand Institute of Directors.