Holyoake is chief executive of the Tamaki Regeneration Company - the largest urban regeneration project in New Zealand, and arole he has held since 2015.
Previously, Holyoake has worked for Serco NZ, Housing NZ and the Department of Corrections in senior leadership roles.
In an earlier article, Western Bay Mayor Garry Webber said Holyoake's appointment reflected the council's anticipation of central government's well-signalled national reforms of Three Waters and the Resource Management Act, and the desire to be ready for the changes.