Warren Johnstone

Audit & Assurance Partner, Christchurch Managing Partner

BDO Christchurch

03 379 5155

03 353 5521




Chartered Accountant (Chartered Accountants Australia & New Zealand)

Holder of Public Practicing Certificate from the New Zealand Institute of Chartered Accountants

Licenced Auditor with the Financial Markets Authority

Approved Auditor with the Office of the Auditor General


Executive Summary

Warren is the Managing Partner of BDO Christchurch and has more than 20 years of accounting and audit experience.  He has been a Partner in the Assurance Services division of BDO Christchurch for the past 15 years. 

Prior to his time at BDO, Warren worked for a number of New Zealand’s leading financial institutions and gained valuable international experience in the United Kingdom. 

Warren has significant experience in the education sector as the auditor for more than 200 schools in the South Island. He is also involved in a variety of special assignments including education reviews, governance assignments, fraud investigations and arbitration/mediation work.

Warren has a particular interest in professional services firms, strategic planning, profit share models and transparent systems and processes. His audit experience is vast, with clients in most sectors and industries including retail, importing, exporting, finance, forestry and wholesaling. 

In his six years as Managing Partner of BDO Christchurch, he has overseen a significant merger and growth that has seen the firm double in size.

Warren is also active in serving the community through a number of Boards. 


Professional Affiliations

Fellow of Chartered Accountants Australia & New Zealand

Member of New Zealand Institute of Directors



Bachelor of Commerce 


Community Involvement

Current Board Chair of St Bede's College, Christchurch

Trustee of the North West Community Sporting Trust

Past Chair of the New Zealand Institute of Chartered Accountants Earthquake Recovery Committee