The most senior non-elected officer of the Corporation of the County of Middlesex is the Chief Administrative Officer (CAO). The CAO directs all administrative services, operations and programs of the County. All department heads within the County report to the CAO.
The CAO represents the County of Middlesex with other public and private agencies with whom the County does business. The CAO also represents the County of Middlesex, along with the Warden, in relations with other municipal governments, provincial officials, or as directed by Council.
Durk Vanderwerff, MPA, MCIP, RPP
Durk Vanderwerff was appointed Acting Chief Administrative Officer (CAO) for the County of Middlesex in April 2025. With over 30 years of public service experience, Durk has built a distinguished career in municipal government. He has served in various roles throughout his career with the County, including Director of Planning and Development, Manager of Planning, and Planner.
Durk holds a Master of Public Administration and a Bachelor of Arts in Urban Development from Western University and is a Registered Professional Planner and member of the Canadian Institute of Planners.
Throughout his tenure, Durk has played a key leadership role in advancing County-wide planning initiatives, supporting strategic corporate priorities, and delivering service excellence across several portfolios.