"I've got some strong ideas about how the trust can provide additional benefits to the community, other than just a dividend cheque at the end of the year."
Mr Atkinson has a wealth of commercial and governance experience through chairing the HB District Health Board, and past directorships of international payroll provider IMS, HB Rugby Union and Unison Networks.
"I've enjoyed my roles and seeing these organisations, the people involved and the broader community prosper."
At the AGM last week the Unison Board has paid a dividend of $12.7 million to the Hawke's Bay Power Consumers Trust for the year ended March 31, 2017.
Mr Atkinson said he was pleased to leave the chairman's role with Unison in great shape, "and have now set my sights on putting my energy into the trust and the community it represents".
In 2010 he was made a member of the New Zealand Order of Merit for services to business and the community.