ConnectOne Bancorp Executive and Leadership Team

June, 2026

Leadership Overview

ConnectOne Bancorp has 6 executives leading key functions including strategy, technology, client relations, human capital, and operations.

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

    Alla Koumoullos, the President, Business Relationship Managerconnectone at ConnectOne Bancorp, cultivates and manages key client relationships, driving business development initiatives. Overseeing the bank's engagement with small and mid-sized businesses and local professionals, Koumoullos ensures tailored financial solutions are delivered. This position is central to expanding ConnectOne Bancorp's footprint in the New York Metropolitan area and South Florida market by fostering strong partnerships. By focusing on client needs, Alla Koumoullos facilitates access to essential banking products such as personal and business checking, money market accounts, and credit card services. The strategic imperative involves deepening client loyalty and expanding the bank's service portfolio, directly contributing to revenue growth and market penetration.

    Matthew Zaloumis - President

    Matthew Zaloumis, the President at ConnectOne Bancorp, drives the overall strategic direction and operational execution of the bank's commercial banking services. Overseeing key business units, Zaloumis ensures the effective delivery of products and services to small and mid-sized businesses, local professionals, and individuals across the New York Metropolitan area and South Florida market. This leadership position is critical for maintaining ConnectOne Bancorp's competitive edge and expanding its market share. By focusing on strategic growth initiatives and operational excellence, Matthew Zaloumis directly impacts the bank's financial performance and client satisfaction. The objective is to foster sustainable growth and reinforce the bank's commitment to providing comprehensive financial solutions.
    Matthew Zaloumis

    Thomas DeMedici - President

    Thomas DeMedici, the President at ConnectOne Bancorp, spearheads the expansion and management of client relationships, particularly focusing on business banking services. Overseeing the development and implementation of strategies for client acquisition and retention, DeMedici ensures ConnectOne Bancorp effectively serves its target markets in the New York Metropolitan area and South Florida. This role is integral to driving revenue growth and enhancing the bank's market presence. By cultivating strong business partnerships and ensuring the delivery of tailored financial solutions, Thomas DeMedici directly contributes to the bank's success. The emphasis is on strengthening the bank's position as a trusted financial partner for businesses and individuals.

    Dawn Machacek - Vice President & Chief of Staff

    Dawn Machacek, the Vice President & Chief of Staff at ConnectOne Bancorp, directs strategic initiatives and operational efficiency across the organization. Overseeing critical projects, Machacek ensures alignment with ConnectOne Bancorp's mission to serve small and mid-sized businesses, local professionals, and individuals. This leadership role involves coordinating cross-departmental efforts to enhance service delivery for personal and business checking, money market accounts, and credit card services. By optimizing internal processes, Dawn Machacek directly supports the bank's expansion into the New York Metropolitan area and South Florida market. The focus remains on driving operational excellence and facilitating the seamless execution of corporate objectives, ensuring robust client relationships and sustained market presence.

    Sharif Alexandre - Executive Vice President & Chief Technology Officer

    Sharif Alexandre, the Executive Vice President & Chief Technology Officer at ConnectOne Bancorp, architects the bank's technological infrastructure and digital strategy. Overseeing all aspects of IT, Alexandre drives innovation in online and mobile banking platforms, ensuring secure and efficient delivery of services. This role is critical for enhancing ConnectOne Bancorp's offerings, including treasury direct, automated clearing house, remote deposit capture, and digital invoicing solutions for business clients. By championing technological advancements, Sharif Alexandre ensures the bank remains competitive in the New York Metropolitan area and South Florida market. The objective is to leverage cutting-edge technology to improve client experience and operational scalability, directly supporting the company's growth and commitment to providing comprehensive financial services.

    Maria Gendelman - Executive Vice President & Chief People Officer

    Maria Gendelman, the Executive Vice President & Chief People Officer at ConnectOne Bancorp, directs human capital strategy and organizational development. Overseeing talent acquisition, employee engagement, and professional development, Gendelman ensures ConnectOne Bancorp attracts and retains top talent essential for serving its client base. This role is vital for fostering a culture that supports the bank's mission in the New York Metropolitan area and South Florida market. By implementing robust HR policies and programs, Maria Gendelman enhances the employee experience, which directly translates to superior client service. The focus is on building a high-performing team capable of delivering innovative financial products and services, thereby strengthening the bank's operational capacity and market reputation.

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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 Matthew Zaloumis (President) and Thomas DeMedici (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), Matthew Zaloumis (President), Thomas DeMedici (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, Vice President & Chief of Staff, Executive Vice President & Chief Technology Officer.