ACI Worldwide Executive and Leadership Team

May, 2026

Leadership Overview

ACI Worldwide has 7 executives leading key functions including strategy, technology, finance, operations, human resources, and payment software.

Driven by innovation, ACI Worldwide delivers essential payment solutions, shaping the future of global commerce through advanced cloud-based technology and a commitment to operational excellence.

Leadership Roles at ACI Worldwide

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

    Lamiya Rahman, the Chief Executive Officer at ACI Worldwide, directs the company's overarching strategy and global operations. Rahman guides the organization's mission to provide cutting-edge payment processing solutions across banking, merchant payments, and billing sectors. This leadership role involves setting the vision for real-time payment platforms and fraud prevention technologies. Rahman ensures ACI Worldwide maintains its market leadership by fostering innovation and driving growth in the digital payments landscape. The Chief Executive Officer's focus extends to strengthening client relationships with financial institutions, merchants, and billers worldwide. By championing cloud-based payment technology, Rahman positions ACI Worldwide for sustained success in the dynamic financial technology industry. Lamiya Rahman's strategic direction is critical for navigating complex market demands and expanding the company's global footprint.

    Robert Leibrock - Chief Financial Officer

    Robert Leibrock, the Chief Financial Officer at ACI Worldwide, manages the company's financial strategy and operational performance. Leibrock oversees all aspects of financial planning, accounting, and reporting, ensuring fiscal responsibility across global operations. This executive position involves optimizing financial resources to support ACI Worldwide's growth in payment processing solutions for banking, merchant payments, and billing. Leibrock's expertise is crucial for maintaining the financial health of the organization and driving profitability. The Chief Financial Officer plays a key part in strategic decision-making, capital allocation, and investor relations. By ensuring robust financial controls, Robert Leibrock supports the company's mission to deliver innovative cloud-based payment technology and fraud prevention services worldwide.

    Tushe Liza - Chief Financial Officer, Operations

    Tushe Liza, the Chief Financial Officer, Operations at ACI Worldwide, directs financial operations and resource management. Liza ensures efficient execution of financial strategies supporting the company's global payment processing services. This role focuses on optimizing operational expenditures and driving financial performance within the software and technology industry. Liza's responsibilities include overseeing budgeting, forecasting, and financial controls for ACI Worldwide's extensive operations. The Chief Financial Officer, Operations is integral to maintaining the company's financial stability and supporting its expansion in real-time payment platforms and digital payment solutions. By aligning financial objectives with operational demands, Tushe Liza enhances the company's ability to serve financial institutions, merchants, and billers effectively worldwide.

    Charles Linberg - Chief Technology Officer

    Charles Linberg, the Chief Technology Officer at ACI Worldwide, architects the company's technological vision and infrastructure. Linberg oversees the development and deployment of advanced payment processing solutions, including real-time payment platforms and robust fraud management systems. This critical role involves driving innovation in cloud-based payment technology to meet the evolving needs of financial institutions, merchants, and billers. Linberg ensures the integrity and scalability of ACI Worldwide's software offerings, supporting global operations across multiple countries. The Chief Technology Officer's responsibilities include managing research and development initiatives and fostering a culture of technological excellence. By leading the engineering teams, Charles Linberg ensures ACI Worldwide remains at the forefront of payment innovation, delivering secure and efficient digital payment solutions worldwide.

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

    Tim Barndt, the Chief Technology Officer, Office & Head Senior VP, Operations at ACI Worldwide, leads critical technology initiatives and oversees operational execution. Barndt directs the integration of advanced payment software and cloud-based payment technology across the company's global infrastructure. This dual role ensures seamless delivery of services in banking, merchant payments, and billing, while optimizing operational efficiency. Barndt's leadership is vital for managing the complex operational demands of a worldwide financial technology company. The Chief Technology Officer, Office & Head Senior VP, Operations drives strategic projects that enhance ACI Worldwide's capabilities in fraud prevention and real-time payment processing. Tim Barndt's focus on operational excellence supports the company's commitment to providing reliable and innovative digital payment solutions to clients globally.

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

    Anup Thomas, the Executive Vice President & Chief Technology Officer, Payment Software at ACI Worldwide, spearheads the development and advancement of the company's core payment software solutions. Thomas guides the technological direction for real-time payment platforms, payment orchestration, and digital payment solutions. This executive role is central to ensuring ACI Worldwide's software offerings meet the highest standards of performance, security, and innovation for financial institutions, merchants, and billers. Thomas oversees the engineering teams responsible for creating and refining the cloud-based payment technology that underpins global transactions. The Executive Vice President & Chief Technology Officer, Payment Software's strategic vision is crucial for maintaining ACI Worldwide's competitive edge in the rapidly evolving fintech landscape. Anup Thomas's leadership ensures the continuous enhancement of software capabilities, driving value for clients worldwide.

    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. Nathawat oversees talent acquisition, employee engagement, and HR operations to support ACI Worldwide's global workforce. This leadership position is essential for fostering a positive and productive work environment that aligns with the company's mission in financial technology. Nathawat's responsibilities include developing programs that attract, retain, and develop top talent across all departments, including technology, finance, and operations. The Chief Human Resources Officer plays a key role in shaping ACI Worldwide's culture and ensuring compliance with labor laws across multiple countries. Praveena Nathawat's strategic approach to human resources supports the company's growth and its commitment to delivering innovative payment solutions worldwide.
    Praveena Nathawat

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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 Robert Leibrock (Chief Financial Officer) and Tushe Liza (Chief Financial Officer, Operations).
    Who is part of ACI Worldwide’s executive team?
    The executive team of ACI Worldwide includes leaders such as Lamiya Rahman (Chief Executive Officer), Robert Leibrock (Chief Financial Officer), Tushe Liza (Chief Financial Officer, Operations) and other senior executives.
    How many executives does ACI Worldwide have?
    ACI Worldwide has 7 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, Chief Financial Officer, Chief Financial Officer, Operations, Chief Technology Officer, Chief Technology Officer, Office & Head Senior VP, Operations.