ACI Worldwide Executive and Leadership Team

June, 2026

Leadership Overview

ACI Worldwide has 9 executives leading key functions including strategy, technology, finance, and human resources.

Driven by innovation, ACI Worldwide is dedicated to transforming global commerce through advanced payment solutions, fostering financial inclusion and efficiency for institutions and consumers alike.

Leadership Roles at ACI Worldwide

  • Chief Executive Officer - Lamiya Rahman
  • President & Chief Executive Officer - Thomas Warsop
  • Chief Financial Officer - Robert Leibrock
  • Chief Financial Officer, Operations - Tushe Liza
  • Chief Technology Officer - Charles Linberg
  • Executive Vice President & Chief Technology Officer, Payment Software - Anup Thomas
  • Chief Human Resources Officer - Praveena Nathawat
  • Executive Vice President & Chief Technology Officer & Biller - Scott Prugh
  • Chief Technology Officer, Office & Head Senior VP, Operations - Tim Barndt
  • Lamiya Rahman - Chief Executive Officer

    Lamiya Rahman, the Chief Executive Officer at ACI Worldwide, directs the company's overarching strategy and global operations. This leadership position involves guiding ACI Worldwide's mission to deliver innovative payment processing solutions across banking, merchant payments, and billing sectors. Rahman's focus centers on driving market expansion and enhancing the company's cloud-based payment technology offerings. The Chief Executive Officer ensures alignment with industry trends and customer needs, solidifying ACI Worldwide's position as a leader in financial technology. This role demands a comprehensive understanding of global payment ecosystems and a commitment to operational excellence. Lamiya Rahman's strategic vision shapes the company's trajectory in the competitive fintech landscape.

    Thomas Warsop - President & Chief Executive Officer

    Thomas Warsop, the President & Chief Executive Officer at ACI Worldwide, spearheads the company's strategic direction and operational execution. This executive leadership role encompasses driving growth initiatives and ensuring the delivery of cutting-edge payment solutions to financial institutions, merchants, and billers globally. Warsop oversees the development and deployment of real-time payment platforms, payment orchestration, and fraud prevention technologies. The President & Chief Executive Officer champions ACI Worldwide's commitment to innovation within the software and finance industry, focusing on cloud-based payment technology. Thomas Warsop's leadership ensures the company maintains its competitive edge by adapting to evolving market demands and technological advancements, thereby securing robust financial performance and expanding market reach.
    Thomas Warsop

    Robert Leibrock - Chief Financial Officer

    Robert Leibrock, the Chief Financial Officer at ACI Worldwide, manages the company's financial strategy and fiscal operations. This critical role involves overseeing all aspects of financial planning, accounting, treasury, and investor relations. Leibrock ensures robust financial controls and drives initiatives to optimize profitability and shareholder value across ACI Worldwide's global operations. The Chief Financial Officer plays a key part in capital allocation, risk management, and supporting strategic growth opportunities within the payment processing solutions sector. Robert Leibrock's expertise guides the financial health of the organization, enabling sustained investment in technology and market expansion for ACI Worldwide's cloud-based payment platforms.

    Tushe Liza - Chief Financial Officer, Operations

    Tushe Liza, the Chief Financial Officer, Operations at ACI Worldwide, oversees the financial management and strategic planning for the company's operational divisions. This executive role involves optimizing financial performance, managing budgets, and ensuring efficient resource allocation across global operations. Liza's responsibilities include driving cost-effectiveness and supporting the strategic initiatives that enhance ACI Worldwide's payment processing solutions. The Chief Financial Officer, Operations collaborates closely with other leaders to align financial strategies with business objectives, particularly in the areas of banking, merchant payments, and billing. Tushe Liza's financial acumen is crucial for sustaining ACI Worldwide's growth and operational excellence in the dynamic financial technology market.

    Charles Linberg - Chief Technology Officer

    Charles Linberg, the Chief Technology Officer at ACI Worldwide, directs the company's technological vision and innovation roadmap. This executive position involves overseeing the architecture, development, and deployment of ACI Worldwide's advanced payment processing solutions, including real-time payment platforms and fraud management systems. Linberg guides the engineering teams in leveraging cloud-based payment technology to meet the evolving needs of financial institutions, merchants, and billers worldwide. The Chief Technology Officer ensures the scalability, security, and performance of ACI Worldwide's software offerings. Charles Linberg's leadership is pivotal in maintaining the company's technological superiority and driving digital transformation within the global payments landscape.

    Anup Thomas - Executive Vice President & Chief Technology Officer, Payment Software

    Anup Thomas, the Executive Vice President & Chief Technology Officer, Payment Software at ACI Worldwide, leads the strategic development and execution of the company's payment software technology. This role focuses on driving innovation in real-time payment platforms, payment orchestration, and digital payment solutions. Thomas oversees the engineering and product management teams responsible for delivering robust, scalable, and secure software that powers global commerce. The Executive Vice President & Chief Technology Officer, Payment Software ensures ACI Worldwide's technology offerings align with market demands and regulatory requirements, supporting financial institutions, merchants, and billers. Anup Thomas's technical leadership is instrumental in advancing ACI Worldwide's cloud-based payment capabilities and maintaining its competitive advantage in the fintech sector.

    Praveena Nathawat - Chief Human Resources Officer

    Praveena Nathawat, the Chief Human Resources Officer at ACI Worldwide, directs the company's human capital strategy and organizational development. This leadership position encompasses talent acquisition, employee engagement, compensation and benefits, and fostering a positive corporate culture across ACI Worldwide's global workforce. Nathawat ensures that HR policies and practices support the company's mission to deliver innovative payment solutions and drive business growth. The Chief Human Resources Officer plays a vital role in attracting and retaining top talent, essential for ACI Worldwide's success in the competitive software and finance industry. Praveena Nathawat's strategic approach to human resources strengthens the organization's capabilities and supports its long-term objectives.
    Praveena Nathawat

    Scott Prugh - Executive Vice President & Chief Technology Officer & Biller

    Scott Prugh, the Executive Vice President & Chief Technology Officer & Biller at ACI Worldwide, leads critical technology initiatives and oversees aspects of the company's biller solutions. This multifaceted role involves driving innovation in payment technology, ensuring the reliability and scalability of ACI Worldwide's platforms, and enhancing services for bill payment sectors. Prugh guides the development of solutions that streamline payment processes for consumers and businesses, supporting ACI Worldwide's mission in financial technology. The Executive Vice President & Chief Technology Officer & Biller focuses on leveraging technology to improve customer experience and operational efficiency within the billing and payment ecosystem. Scott Prugh's expertise is key to advancing ACI Worldwide's market position and technological capabilities.
    Scott Prugh

    Tim Barndt - Chief Technology Officer, Office & Head Senior VP, Operations

    Tim Barndt, the Chief Technology Officer, Office & Head Senior VP, Operations at ACI Worldwide, directs the company's operational technology strategy and oversees key operational functions. This executive role involves ensuring the efficiency, security, and performance of ACI Worldwide's technology infrastructure supporting its global payment processing solutions. Barndt's responsibilities include driving operational excellence and implementing technological advancements that enhance service delivery for banking, merchant payments, and billing clients. The Chief Technology Officer, Office & Head Senior VP, Operations collaborates with cross-functional teams to optimize workflows and support ACI Worldwide's strategic growth objectives. Tim Barndt's leadership ensures robust operational capabilities and technological innovation across the organization.

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    Frequently Asked Questions Regarding ACI Worldwide Top Executives and Leadership Team

    Who leads ACI Worldwide?
    ACI Worldwide is led by Lamiya Rahman (Chief Executive Officer), along with executives such as Thomas Warsop (President & Chief Executive Officer) and Robert Leibrock (Chief Financial Officer).
    Who is part of ACI Worldwide’s executive team?
    The executive team of ACI Worldwide includes leaders such as Lamiya Rahman (Chief Executive Officer), Thomas Warsop (President & Chief Executive Officer), Robert Leibrock (Chief Financial Officer) and other senior executives.
    How many executives does ACI Worldwide have?
    ACI Worldwide has 9 executives leading key business areas.
    What roles are included in ACI Worldwide’s leadership team?
    The leadership team of ACI Worldwide includes roles such as Chief Executive Officer, President & Chief Executive Officer, Chief Financial Officer, Chief Financial Officer, Operations, Chief Technology Officer.