Ixonia Bank Executive and Leadership Team

July, 2026

Leadership Overview

Ixonia Bank has 4 executives leading key functions including strategy, finance, and operations.

Driven by a century of service, Ixonia Bank is dedicated to providing comprehensive financial solutions and fostering community growth across Wisconsin.

Leadership Roles at Ixonia Bank

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

    Gregory Larson, the Chief Executive Officer at Ixonia Bank, directs the overall strategic vision and operational framework for the institution. Overseeing all major business units, Gregory Larson ensures alignment with the bank's century-long commitment to comprehensive commercial banking and financial services. This leadership role involves guiding the expansion of assets, currently exceeding $500 million, and maintaining the integrity of services offered across seven locations in Jefferson, Milwaukee, and Waukesha Counties. The Chief Executive Officer's mandate includes fostering innovation in personal checking, savings, loans, and wealth management, directly impacting the bank's market presence and client trust. By championing a forward-thinking approach, Gregory Larson solidifies Ixonia Bank's position as a trusted financial partner.

    John Eimon - Executive Vice President & Chief Financial Officer

    John Eimon, the Executive Vice President & Chief Financial Officer at Ixonia Bank, manages the financial health and strategic fiscal planning of the organization. Overseeing all financial operations, John Eimon ensures the prudent management of assets exceeding $500 million and drives profitability across all service lines. This critical role involves detailed oversight of commercial banking products, personal checking, savings accounts, loan portfolios, and wealth management services. By implementing robust financial controls and identifying growth opportunities, the Executive Vice President & Chief Financial Officer supports the bank's expansion into Jefferson, Milwaukee, and Waukesha Counties. John Eimon's expertise is fundamental to maintaining Ixonia Bank's stability and enhancing shareholder value through disciplined financial stewardship.

    Erika Nowak - Executive Vice President & Chief Financial Officer

    Erika Nowak, the Executive Vice President & Chief Financial Officer at Ixonia Bank, spearheads the financial strategy and resource allocation for the institution. Managing the fiscal integrity of operations, Erika Nowak ensures the effective deployment of capital across the bank's diverse financial services, including commercial banking, personal accounts, loans, and wealth management. This executive position is vital for sustaining and growing Ixonia Bank's asset base, which surpasses $500 million, and for optimizing financial performance across its seven Wisconsin locations. By driving financial efficiency and compliance, the Executive Vice President & Chief Financial Officer supports the bank's long-term objectives and its commitment to serving communities in Jefferson, Milwaukee, and Waukesha Counties. Erika Nowak's leadership ensures robust financial planning and execution.
    Erika Nowak

    Mark Wierman - President

    Mark Wierman, the President at Ixonia Bank, leads the strategic direction and operational execution across the bank's extensive service network. Overseeing the delivery of a full suite of commercial banking products and personal financial services, Mark Wierman ensures seamless customer experiences at all seven locations. This leadership position is crucial for driving the bank's growth, which has seen assets climb over $500 million, and for maintaining its reputation for reliability since 1918. The President's focus includes enhancing offerings in checking, savings, loans, and wealth management, thereby strengthening Ixonia Bank's market position within Jefferson, Milwaukee, and Waukesha Counties. Mark Wierman's commitment to operational excellence underpins the bank's enduring success and community engagement.
    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 John Eimon (Executive Vice President & Chief Financial Officer) and Erika Nowak (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), John Eimon (Executive Vice President & Chief Financial Officer), Erika Nowak (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.