Milwaukee County Transit System Executive and Leadership Team

June, 2026

Leadership Overview

Milwaukee County Transit System has 6 executives leading key functions including finance, information technology, human resources, administration, and operations.

Driven by a commitment to public service, Milwaukee County Transit System operates extensive bus routes across Wisconsin, ensuring accessible and reliable transportation for Milwaukee County residents and visitors.

Leadership Roles at Milwaukee County Transit System

  • Chief Financial Officer - Alexander Corona
  • Chief Financial Officer & Treasurer - Herbert Mallinger
  • President & Managing Director - Denise Wandke
  • Chief Information Officer & Chief Information Security Officer - William Bethia
  • Chief Human Resources Officer - Benjamin Stark
  • Chief Administrative Officer - Sandra Kellner
  • Alexander Corona - Chief Financial Officer

    Alexander Corona, the Chief Financial Officer at Milwaukee County Transit System, directs all fiscal operations and financial strategy. Corona manages the agency's budget, financial planning, and resource allocation, ensuring fiscal responsibility across all departments. This leadership role involves optimizing financial performance and securing funding to support operational expansion and service enhancements. By analyzing financial data, Corona identifies opportunities for cost savings and revenue generation, directly impacting the agency's long-term sustainability. The Chief Financial Officer's oversight extends to financial reporting, compliance, and investment strategies, maintaining the financial health of the transit system. Corona's expertise ensures that Milwaukee County Transit System effectively serves its members through sound financial management.

    Herbert Mallinger - Chief Financial Officer & Treasurer

    Herbert Mallinger, the Chief Financial Officer & Treasurer at Milwaukee County Transit System, manages the agency's comprehensive financial health and treasury functions. Mallinger oversees financial planning, budgeting, cash management, and investment activities, ensuring robust fiscal controls and compliance with all regulatory requirements. This position is vital for maintaining the operational capacity of the transit system's extensive bus fleet and diverse local routes. By directing treasury operations, Herbert Mallinger ensures liquidity and optimizes the use of financial resources to support service delivery and capital investments. The Chief Financial Officer & Treasurer's strategic insights guide financial decision-making, contributing to the agency's stability and growth. Mallinger's stewardship ensures the financial integrity of Milwaukee County Transit System's operations.

    Denise Wandke - President & Managing Director

    Denise Wandke, the President & Managing Director at Milwaukee County Transit System, provides executive leadership and strategic direction for the entire organization. Wandke guides the agency's overall mission, operational strategy, and market positioning, ensuring the effective delivery of transportation services across Milwaukee County. This pivotal role involves overseeing all aspects of the transit system, from fleet management and route optimization to community engagement and stakeholder relations. By driving strategic initiatives and fostering a culture of service excellence, Denise Wandke ensures the Milwaukee County Transit System meets the evolving needs of its riders. The President & Managing Director's vision shapes the future of public transit in the region, enhancing accessibility and sustainability. Wandke's leadership is central to the system's success.
    Denise Wandke

    William Bethia - Chief Information Officer & Chief Information Security Officer

    William Bethia, the Chief Information Officer & Chief Information Security Officer at Milwaukee County Transit System, architects and executes the agency's technology strategy and cybersecurity posture. Bethia oversees all IT infrastructure, digital services, and data management, ensuring operational efficiency and system integrity. This dual role demands a comprehensive approach to information security, protecting sensitive data and critical systems from evolving threats. By implementing robust security protocols and disaster recovery plans, Bethia safeguards the transit system's digital assets. The Chief Information Officer & Chief Information Security Officer's leadership drives technological innovation, enhancing passenger experience through digital platforms and improving internal operational workflows. William Bethia ensures that Milwaukee County Transit System leverages technology securely and effectively to meet its service obligations.

    Benjamin Stark - Chief Human Resources Officer

    Benjamin Stark, the Chief Human Resources Officer at Milwaukee County Transit System, leads all human capital management initiatives and organizational development. Stark oversees talent acquisition, employee relations, compensation, benefits, and workforce training programs, fostering a productive and supportive work environment. This critical role ensures the transit system attracts, retains, and develops a skilled workforce capable of delivering exceptional service across its multiple bus routes. By championing employee engagement and implementing effective HR policies, Benjamin Stark cultivates a culture of excellence and accountability. The Chief Human Resources Officer's strategic direction supports the agency's mission by aligning human resources with operational goals and promoting professional growth for all team members. Stark's focus on people empowers the Milwaukee County Transit System's dedicated staff.
    Benjamin Stark

    Sandra Kellner - Chief Administrative Officer

    Sandra Kellner, the Chief Administrative Officer at Milwaukee County Transit System, directs the operational efficiency and administrative functions supporting the agency's extensive transit network. Kellner oversees critical support services, including procurement, facilities management, and interdepartmental coordination, ensuring seamless operations across all departments. This leadership position is essential for optimizing resource utilization and streamlining administrative processes that underpin the transit system's service delivery. By enhancing operational workflows and managing key administrative functions, Sandra Kellner contributes directly to the reliability and accessibility of Milwaukee's bus routes. The Chief Administrative Officer's focus on operational excellence supports the agency's mission to serve the members of Milwaukee County effectively. Kellner's expertise drives administrative effectiveness.

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    Frequently Asked Questions Regarding Milwaukee County Transit System Top Executives and Leadership Team

    Who leads Milwaukee County Transit System?
    Milwaukee County Transit System is led by Alexander Corona (Chief Financial Officer), along with executives such as Herbert Mallinger (Chief Financial Officer & Treasurer) and Denise Wandke (President & Managing Director).
    Who is part of Milwaukee County Transit System’s executive team?
    The executive team of Milwaukee County Transit System includes leaders such as Alexander Corona (Chief Financial Officer), Herbert Mallinger (Chief Financial Officer & Treasurer), Denise Wandke (President & Managing Director) and other senior executives.
    How many executives does Milwaukee County Transit System have?
    Milwaukee County Transit System has 6 executives leading key business areas.
    What roles are included in Milwaukee County Transit System’s leadership team?
    The leadership team of Milwaukee County Transit System includes roles such as Chief Financial Officer, Chief Financial Officer & Treasurer, President & Managing Director, Chief Information Officer & Chief Information Security Officer, Chief Human Resources Officer.