West Des Moines Water Works
Delivering reliably safe and refreshing water.
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Management Team


West Des Moines Water Works is professionally managed by an experienced staff with backgrounds in engineering, water treatment science, finance and accounting and operations. Working in tandem with the five-member board of trustees, the staff implements policies and directives designed to deliver safe, clean, quality drinking water to its customers.

Diana Wilson, General Manager
Ms. Wilson first joined West Des Moines Water Works in 2010 as an engineering project manager. After demonstrating leadership qualities, she was promoted to the post of general manager in May of 2013. Before WDMWW, Wilson worked six years as an environmental engineer with the Iowa Department of Natural Resources where she focused on a variety of drinking water projects, initiatives and regulations. A graduate of Iowa State University with a degree in civil engineering, Ms. Wilson also worked in the private sector as a field engineer and project manager.  Ms. Wilson is a licensed professional engineer in Iowa and has earned Professional Operator designations and State of Iowa Grade 4 licenses in both Water Treatment and Water Distribution.

William Mabuce, Engineering Project Manager
Mr. Mabuce is a licensed professional engineer in Iowa and Minnesota with more than fourteen years of engineering experience working on a variety of municipal engineering projects. In his role as project manager, he oversees all facets of the utility's construction projects including planning, design, bidding, monitoring and assessment. Before joining WDMWW, Mr. Mabuce worked as an engineer and project manager for two area engineering firms.. He earned a bachelor's degree in civil engineering from the University of Minnesota, a bachelor of arts degree from Luther College, and a Master's degree in Business Administration from the University of Iowa. Mr. Mabuce has earned a Professional Operator designation in Water Distribution (Grade IV). Mr. Mabuce currently holds a Grade 4 Water Distribution and Grade 2 Water Treatment licenses from the State of Iowa.

Rebecca Scott, Finance Manager & Treasurer

Josh Heggen, Business Relations Manager 
Mr. Heggen has served as the business relations manager since February of 2015. In this role, he is leading the effort in automating the WDMWW's meter reading functions. He manages the utility's billing and payment system as well as customer service and the water meter technicians. Before joining the West Des Moines Water Works, Mr. Heggen served in other local government capacities with the City of Norwalk and Windsor Heights. He has also worked for the State of Iowa with the Iowa Commission on Volunteer Service and Governor Tom Vilsack’s Office. He earned a bachelor’s degree in public administration and political science from the University of Northern Iowa and holds a master’s degree in public administration from Drake University.

Mitch Pinkerton, Water Production Manager
Mr. Pinkerton has been with WDMWW for 31 years, with in depth experience in the operation and management of water treatment and water distribution systems. Mr. Pinkerton was the Water Production Supervisor at the A.C. Ward Municipal Water Treatment Plant before becoming the Water Production Manager in 2010. As Water Production Manager, Mr. Pinkerton is responsible for operation and maintenance of water treatment, storage, and pumping facilities. Mr. Pinkerton is also responsible for maintaining a state-certified laboratory facility and ensuring compliance with state and federal regulations for water quality and sampling. Mr. Pinkerton has earned Grade 4 licenses from the State of Iowa for Water Treatment and Water Distribution.

Mark Hanasz, Water Distribution Manager
Mr. Hanasz has been with the West Des Moines Water Works for 21 years, beginning as a water meter reader and working his way to the Water Distribution Manager position in 2012. As Water Distribution Manager, Mr. Hanasz is responsible for the maintenance and operation of over 240 miles of water main, 2750 fire hydrants, and 3135 valves in the public water supply system. Additionally, Mr. Hanasz is responsible for the investigation and repair of water main breaks, ensuring service to customers is returned in a safe and expedient manner. Mr. Hanasz currently holds a Grade 3 license from the State of Iowa in Water Distribution.