Moulton Niguel Board of Directors

The Moulton Niguel Water District elected Board of Directors is dedicated to providing our community with safe and reliable water services along with the latest water conservation information. The Moulton Niguel Board actively encourages the local community to participate in the ongoing
conversation about water usage in our area.

Committed to Our Community

As your local water supplier, Moulton Niguel takes an active role in our community. Our elected Board of Directors is committed to providing the community with safe and reliable water services, as well as information on current water issues.

Feel free to email our Board at boardofdirectors@mnwd.com.

Meet Our Board


Duane Cave serves as President of the Moulton Niguel Water District. Mr. Cave has served as a member of the Moulton Niguel Board of Directors since 2014. In his capacity as chair of the Board’s Technical Committee, Mr. Cave has worked to build a robust infrastructure, approve balanced budgets, and maintain prudent emergency reserves. An experienced utility professional, President Cave uses his extensive knowledge of public utilities and public affairs to cement Moulton Niguel’s reputation as an award-winning utility provider.

Current term through 2024

Brian Probolsky serves as First Vice President of the Moulton Niguel Water District. Mr. Probolsky has served as a member of the Moulton Niguel Board of Directors since 2008. During his tenure, the district has won numerous awards from the WaterNow Alliance, Association of California Cities – Orange County, Orange County Business Council, and SustainOC as well as the State of California’s highest environmental honor. Probolsky’s priorities include maintaining reliable access to a clean water supply, protecting our beaches and local waterways from pollution, and embracing state-of-the-art water technology to improve customer service and reduce operating costs.

Current term through 2024

Diane Rifkin serves as second Vice President of the Moulton Niguel Water District. On the strength of her impressive professional background, interest in local water and infrastructure issues, and long-term community service and leadership in the District, she was elected to the Board in 2022 to serve her second term.

Current term through 2026

Richard S. “Dick” Fiore serves as an elected member of the Board of Directors for the Moulton Niguel Water District. First elected to the Moulton Niguel Board in 1977, Director Fiore has played a key role in guiding the District through its years of rapid growth and development, and multiple periods of drought. Director Fiore has held numerous leadership positions at Moulton Niguel, including serving as President of the Moulton Niguel Board of Directors and Chairman of the District’s Finance, Legal, Engineering, Outreach, and Community Relations committees. He currently chairs the Administrative Committee.

Current term through 2024

Donald R. Froelich serves as an elected member of the Board of Directors for the Moulton Niguel Water District. For the past decade, Director Froelich has applied his engineering knowledge, legal acumen, and technical skills in overseeing Moulton Niguel’s robust infrastructure system, which includes more than 1,300 miles of water, wastewater and recycled water pipelines, approximately 20,000 valves, 53 pump and lift stations, 39 reservoirs, and four treatment plants. During his previous term as president of the Board of Directors, then-Vice President Froelich helped develop the District’s ten-year capital improvement plan, which will invest $533 million into upgrading Moulton Niguel’s extensive water infrastructure system.

Current term through 2026

William “Bill” Moorhead serves as an elected Director of the Moulton Niguel Water District. A registered civil engineer and principal water engineer, Mr. Moorhead understands the challenges of managing complex projects while ensuring fair and equitable water rates for customers. First elected to the Board in 2018, he supports investing in state-of-the-art infrastructure and promoting sustainable water policies that will help the District prepare for perennial drought cycles and uncertainty over imported water supplies.

Current term through 2026

Sherry Wanninger serves as an elected Director of the Moulton Niguel Water District and represents the District on the Santiago Aqueduct Commission. Elected to her first term in 2020, Ms. Wanninger believes in prioritizing long-term water resiliency to build on the District’s success at delivering safe, reliable and affordable water services to its more than 172,000 customers.

Current term through 2024

Feel free to email your Board at boardofdirectors@mnwd.com.

Members of the community are also welcome to attend open session Board of Directors meetings. See below for a list of upcoming Board of Directors meetings, events and agendas.

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