ConnectOne Bancorp Executive and Leadership Team

August, 2026

Leadership Overview

ConnectOne Bancorp has 6 executives leading key functions including technology, operations, human resources, and business development.

Driven by a commitment to client success, ConnectOne Bancorp provides essential commercial banking services, fostering growth for businesses and individuals across the New York Metropolitan area and South Florida market.

Leadership Roles at ConnectOne Bancorp

  • President, Business Relationship Managerconnectone - Alla Koumoullos
  • President - Thomas DeMedici
  • President - Matthew Zaloumis
  • Executive Vice President & Chief Technology Officer - Sharif Alexandre
  • Senior Vice President and Chief of Staff - Dawn Machacek
  • Executive Vice President & Chief People Officer - Maria Gendelman
  • Alla Koumoullos - President, Business Relationship Managerconnectone

    Alla Koumoullos, the President, Business Relationship Managerconnectone at ConnectOne Bancorp, drives client acquisition and relationship management for business banking services. Koumoullos focuses on expanding the bank's portfolio of commercial clients, particularly small and mid-sized businesses, by delivering tailored financial solutions. This role involves deep engagement with clients to understand their unique needs, offering expertise in areas such as treasury management, digital invoicing, and credit facilities. Alla Koumoullos ensures that ConnectOne Bancorp's services, including personal and business checking accounts and cash management solutions, meet the evolving demands of the market. The strategic cultivation of these relationships is paramount to ConnectOne Bancorp's growth objectives within the New York Metropolitan area and South Florida market, solidifying the bank's reputation for personalized service.

    Thomas DeMedici - President

    Thomas DeMedici, the President at ConnectOne Bancorp, spearheads strategic growth initiatives and oversees key operational areas of the bank. DeMedici's leadership focuses on enhancing ConnectOne Bancorp's market presence by driving the expansion of its commercial banking products and services. This involves fostering strong relationships with local professionals and businesses, ensuring the delivery of comprehensive solutions such as money market accounts, credit cards, and retirement accounts. Thomas DeMedici plays a pivotal role in aligning departmental objectives with the overarching mission of providing exceptional financial services across the New York Metropolitan area and South Florida market. The strategic vision and operational oversight provided by DeMedici are essential for navigating market dynamics and achieving ConnectOne Bancorp's ambitious growth targets.

    Matthew Zaloumis - President

    Matthew Zaloumis, the President at ConnectOne Bancorp, directs the bank's strategic direction and operational execution, focusing on expanding its reach within the financial services sector. Zaloumis is instrumental in developing and implementing strategies that enhance ConnectOne Bancorp's offerings, including personal and business checking accounts, savings accounts, and advanced cash management services. This leadership role involves cultivating key business relationships and ensuring the bank's services meet the specific needs of small and mid-sized businesses and local professionals. Matthew Zaloumis's commitment to innovation drives the adoption of digital banking solutions, such as automated teller services and mobile banking, reinforcing ConnectOne Bancorp's competitive edge in the New York Metropolitan area and South Florida market. The strategic leadership of Zaloumis is critical for driving revenue growth and market penetration.
    Matthew Zaloumis

    Sharif Alexandre - Executive Vice President & Chief Technology Officer

    Sharif Alexandre, the Executive Vice President & Chief Technology Officer at ConnectOne Bancorp, directs the bank's technological infrastructure and digital strategy. Overseeing all aspects of IT operations, Alexandre ensures the secure and efficient delivery of online and mobile banking platforms, supporting the company's commitment to providing advanced cash management services and digital invoicing solutions. This leadership role involves architecting scalable cloud infrastructure and implementing innovative fintech strategies to enhance customer experience and operational efficiency across the New York Metropolitan area and South Florida market. Alexandre's focus on robust cybersecurity measures protects client data and maintains the integrity of financial transactions, directly supporting ConnectOne Bancorp's mission to serve local professionals and businesses with cutting-edge banking technology.

    Dawn Machacek - Senior Vice President and Chief of Staff

    Dawn Machacek, the Senior Vice President and Chief of Staff at ConnectOne Bancorp, orchestrates strategic initiatives and operational alignment across the organization. Machacek ensures seamless execution of the bank's business development objectives, working closely with executive leadership to translate corporate strategy into actionable plans. This role involves managing key projects, facilitating interdepartmental communication, and optimizing internal processes to support the delivery of commercial banking products and services to small and mid-sized businesses. Machacek's oversight extends to enhancing the efficiency of treasury direct, automated clearing house, and remote deposit capture services, thereby reinforcing ConnectOne Bancorp's market position in the New York Metropolitan area and South Florida. The strategic coordination provided by Dawn Machacek is critical for maintaining operational excellence and driving growth.

    Maria Gendelman - Executive Vice President & Chief People Officer

    Maria Gendelman, the Executive Vice President & Chief People Officer at ConnectOne Bancorp, shapes the organization's human capital strategy and fosters a high-performance culture. Gendelman leads all human resources functions, including talent acquisition, employee development, and compensation and benefits, ensuring ConnectOne Bancorp attracts and retains top talent in the competitive financial services sector. This leadership position involves cultivating an environment that supports the bank's mission to serve local professionals and businesses, aligning people strategies with business objectives. Maria Gendelman's expertise is crucial in developing programs that enhance employee engagement and support the company's expansion in the New York Metropolitan area and South Florida market. The strategic direction provided by Gendelman ensures a motivated and skilled workforce, vital for delivering exceptional client service and driving ConnectOne Bancorp's sustained success.

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    Frequently Asked Questions Regarding ConnectOne Bancorp Top Executives and Leadership Team

    Who leads ConnectOne Bancorp?
    ConnectOne Bancorp is led by Alla Koumoullos (President, Business Relationship Managerconnectone), along with executives such as Thomas DeMedici (President) and Matthew Zaloumis (President).
    Who is part of ConnectOne Bancorp’s executive team?
    The executive team of ConnectOne Bancorp includes leaders such as Alla Koumoullos (President, Business Relationship Managerconnectone), Thomas DeMedici (President), Matthew Zaloumis (President) and other senior executives.
    How many executives does ConnectOne Bancorp have?
    ConnectOne Bancorp has 6 executives leading key business areas.
    What roles are included in ConnectOne Bancorp’s leadership team?
    The leadership team of ConnectOne Bancorp includes roles such as President, Business Relationship Managerconnectone, President, President, Executive Vice President & Chief Technology Officer, Senior Vice President and Chief of Staff.