Office of the Comptroller

Meet Liz

Liz Sumner

Comptroller

Liz Sumner serves as the Comptroller of Milwaukee County, bringing extensive experience in finance, leadership, and public service to the role. She holds an MBA in Finance and Strategy from the University of Chicago Booth School of Business and an undergraduate degree in Political Science and French from Marquette University. Prior to her current position, Sumner served as the Milwaukee County Supervisor for District 1 and as a Fox Point Village Trustee.  In addition, Liz has been a successful small business owner since 2007. A proud Milwaukee native, she is grateful for the opportunity to raise her two children in the same community in which she was raised. As Comptroller, Sumner is committed to safeguarding the county’s financial integrity through strategic oversight and innovative fiscal management.

Meet Jim

Jim Moon

Deputy Comptroller

Jim Moon is the Deputy Comptroller for Milwaukee County. In this position, he is responsible for maintaining financial integrity and transparency within Milwaukee County's operations, assisting in financial oversight and administration, supervising accounting records and transactions, and administering shared services contracts. Moon holds a bachelor's degree in finance and an MBA with a finance emphasis. He has over five years of progressively responsible experience in public or governmental accounting and the application of GASB and GAAP, as well as over 25 years of experience in financial planning, analysis, management, and reporting. He has a strong background in creating and leading high-performing teams, budget development and administration, and accounting experience in both private and public sectors.

Additionally, Moon has extensive experience with ERP systems and accounting software and has held supervisory or management roles overseeing staff and collaborating across departments. Some of his key accomplishments include contributing to winning the JLTV 1 and FMTV A2 contracts, obtaining a yellow belt certification, successfully leading and facilitating over 20 continuous improvement events, and increasing Central Business Office budget forecasting accuracy to within +/- 5% of actuals, a 20% improvement. Moon's work supports Milwaukee County residents by ensuring the County’s finances are managed with integrity, transparency, and efficiency. He oversees proper accounting and auditing processes to ensure taxpayer money is spent lawfully and efficiently, reducing waste, fraud, and misuse, and evaluates programs to identify disparities or inefficiencies in service delivery, ensuring equitable treatment of all residents.