Ixonia Bank Executive and Leadership Team

August, 2026

Leadership Overview

Ixonia Bank has 4 executives leading key functions including strategy, financial oversight, and commercial banking operations.

Committed to community-focused financial growth, Ixonia Bank delivers comprehensive commercial banking products and wealth management services while maintaining a century-long tradition of stability and personalized client support across Wisconsin.

Leadership Roles at Ixonia Bank

  • Chief Executive Officer - Gregory Larson
  • Executive Vice President & Chief Financial Officer - Erika Nowak
  • Executive Vice President & Chief Financial Officer - John Eimon
  • President - Mark Wierman
  • Gregory Larson - Chief Executive Officer

    Gregory Larson, the Chief Executive Officer at Ixonia Bank, directs the overarching strategic vision and long-term growth initiatives for the institution. Overseeing the expansion of commercial banking products, the Chief Executive Officer ensures alignment between institutional goals and the evolving financial needs of clients throughout Jefferson, Milwaukee, and Waukesha Counties. This leadership role involves constant collaboration with the Board to maintain asset growth and operational excellence. By fostering a culture of community-focused service, Gregory Larson drives the bank toward sustained profitability and market relevance. The Chief Executive Officer monitors regional economic trends to refine service delivery models, ensuring the bank remains a cornerstone of local financial stability. Through rigorous oversight of all banking divisions, the Chief Executive Officer secures the future of the organization while upholding the century-long legacy of trust and reliability that defines the institution.

    Erika Nowak - Executive Vice President & Chief Financial Officer

    Erika Nowak, the Executive Vice President & Chief Financial Officer at Ixonia Bank, manages the internal fiscal health and capital allocation strategies for the organization. Focusing on the integrity of financial reporting, the Executive Vice President & Chief Financial Officer optimizes the balance sheet to support the bank's $500 million asset base. This role requires precise management of liquidity and risk assessment frameworks to ensure compliance with regulatory standards. Erika Nowak coordinates with the executive team to evaluate investment opportunities and capital expenditures that enhance service offerings. By streamlining internal accounting processes, the Executive Vice President & Chief Financial Officer improves operational efficiency across all seven locations. The Executive Vice President & Chief Financial Officer maintains a sharp focus on long-term fiscal sustainability, ensuring that the bank possesses the necessary resources to fund commercial loans and personal financial services for the diverse client base served by the institution.
    Erika Nowak

    John Eimon - Executive Vice President & Chief Financial Officer

    John Eimon, the Executive Vice President & Chief Financial Officer at Ixonia Bank, oversees the strategic deployment of financial resources and the management of institutional treasury functions. Concentrating on the optimization of wealth management services and commercial loan portfolios, the Executive Vice President & Chief Financial Officer drives revenue growth through disciplined fiscal planning. This leadership position involves analyzing market data to refine interest rate strategies and deposit growth initiatives. John Eimon collaborates with the broader leadership team to ensure that financial operations support the bank's expansion goals within the Wisconsin market. By implementing robust financial controls, the Executive Vice President & Chief Financial Officer mitigates operational risks while maximizing shareholder value. The Executive Vice President & Chief Financial Officer maintains a focus on the technical aspects of banking, ensuring that the institution remains competitive in the delivery of personal checking, savings, and complex commercial banking solutions.

    Mark Wierman - President

    Mark Wierman, the President at Ixonia Bank, executes the daily operational agenda and manages the delivery of banking services across all regional locations. Overseeing the integration of commercial banking products and personal financial services, the President ensures that client-facing teams maintain high standards of service excellence. This role involves direct management of branch operations and the implementation of customer-centric initiatives that drive market penetration in Jefferson, Milwaukee, and Waukesha Counties. Mark Wierman coordinates with other executives to align departmental performance with the bank's overarching mission of community support. By fostering strong relationships with local businesses and individual clients, the President strengthens the bank's market position. The President monitors service quality and operational workflows to ensure that the institution remains agile and responsive to the needs of the community, ultimately supporting the bank's growth and long-term commitment to providing comprehensive financial solutions.
    Mark Wierman

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    Frequently Asked Questions Regarding Ixonia Bank Top Executives and Leadership Team

    Who leads Ixonia Bank?
    Ixonia Bank is led by Gregory Larson (Chief Executive Officer), along with executives such as Erika Nowak (Executive Vice President & Chief Financial Officer) and John Eimon (Executive Vice President & Chief Financial Officer).
    Who is part of Ixonia Bank’s executive team?
    The executive team of Ixonia Bank includes leaders such as Gregory Larson (Chief Executive Officer), Erika Nowak (Executive Vice President & Chief Financial Officer), John Eimon (Executive Vice President & Chief Financial Officer) and other senior executives.
    How many executives does Ixonia Bank have?
    Ixonia Bank has 4 executives leading key business areas.
    What roles are included in Ixonia Bank’s leadership team?
    The leadership team of Ixonia Bank includes roles such as Chief Executive Officer, Executive Vice President & Chief Financial Officer, Executive Vice President & Chief Financial Officer, President.