Oliver has worked in senior leadership roles within a number of government, commercial and not-for-profit organisations, both in New Zealand and abroad over the course of his career.
He is currently the Owner and Managing Director of OT Milk Distributors Ltd. He is also the Commanding Officer for the 3/6 Battalion of the New Zealand Army which involves leadership of 280 Regular Force and Army Reserve soldiers and officers.
He has led and been involved in a number of Defence Force overseas deployments and projects, and earlier this year, was the Commander of the New Zealand Defence Force contingent to Gallipoli.
From 2012-2015 he was General Manager of Organisational Development for Hamilton City Council. Prior to this he was the Community Development Manager for around five years.
This followed around seven years working with Ministry for Social Development in Auckland, and prior to this, for Te Puni Kokiri.
He has been involved in a number of other local boards, including approximately nine years as the Chairperson of the Aberdeen School Board of Trustees.