HOK Executive and Leadership Team

October, 2026

Leadership Overview

HOK has 10 executives leading key functions including strategy, financial oversight, technology integration, operational management, information systems, and legal compliance.

Driven by a commitment to sustainable design and high-performance architecture, HOK delivers innovative planning and engineering solutions that reduce energy use intensity and embodied carbon across global markets.

Leadership Roles at HOK

  • Co-Chief Executive Officer At HOK - Susan Williams
  • Chief Financial Officer - George Valenti
  • Senior Vice President, Chief Financial Officer - Misty Yanko
  • Senior Vice President & Chief Financial Officer - Terry Paterni
  • Chief Operating Officer - Thomas Robson
  • President - Carl Galioto
  • President - Mei-Hwie Sie
  • Chief Technology Officer - James Vandezande
  • Chief Information Officer - John Bartolomi
  • Chief Legal Officer - Lisa Green
  • Susan Williams - Co-Chief Executive Officer At HOK

    Susan Williams, the Co-Chief Executive Officer At HOK, directs the overarching strategic vision and global growth initiatives for the firm. Overseeing the expansion of design disciplines across North America, Europe, and Asia, the Co-Chief Executive Officer At HOK ensures alignment between architectural excellence and long-term business sustainability. This leadership role involves managing complex stakeholder relationships and driving the firm's commitment to reducing embodied carbon in large-scale projects. By fostering a culture of innovation, Susan Williams directly impacts the firm's ability to secure high-profile contracts in the aviation, healthcare, and civic sectors. Williams maintains a focus on operational efficiency while guiding the firm through evolving market demands. Ultimately, the Co-Chief Executive Officer At HOK secures the firm's position as a global leader in high-performance, sustainable built environments through rigorous strategic planning and consistent delivery of world-class design solutions.

    George Valenti - Chief Financial Officer

    George Valenti, the Chief Financial Officer at HOK, manages the fiscal health and capital allocation strategies for the global design firm. Overseeing financial reporting and risk management, the Chief Financial Officer ensures the firm maintains a robust balance sheet to support international operations. This leadership role involves optimizing project profitability and monitoring investment in sustainable design technologies. By analyzing market trends across the aviation, commercial, and government sectors, George Valenti directly impacts the firm's ability to scale operations effectively. Valenti coordinates with the executive team to align financial goals with the firm's mission of creating high-performance built environments. Through disciplined fiscal oversight, the Chief Financial Officer supports the firm's long-term growth objectives and ensures the availability of resources for complex, multi-disciplinary projects across diverse geographic regions, maintaining the firm's competitive edge in the global architecture and engineering market.

    Misty Yanko - Senior Vice President, Chief Financial Officer

    Misty Yanko, the Senior Vice President, Chief Financial Officer at HOK, manages the financial planning and analysis for specific business units within the firm. Overseeing budget forecasting and cost control measures, the Senior Vice President, Chief Financial Officer ensures that individual project portfolios remain profitable while adhering to the firm's sustainability standards. This leadership role involves evaluating the financial viability of new market opportunities in the corporate and commercial sectors. By providing detailed financial insights, Misty Yanko directly impacts the firm's ability to allocate resources toward high-impact, sustainable design initiatives. Yanko collaborates with project managers to monitor expenditures and improve financial performance across regional operations. Through rigorous financial oversight, the Senior Vice President, Chief Financial Officer supports the firm's overall mission, ensuring that fiscal discipline remains a core component of the firm's ability to deliver world-class architecture and engineering solutions globally.
    Misty Yanko

    Terry Paterni - Senior Vice President & Chief Financial Officer

    Terry Paterni, the Senior Vice President & Chief Financial Officer at HOK, directs the treasury functions and long-term financial strategy for the firm's international operations. Overseeing cash management and capital investment, the Senior Vice President & Chief Financial Officer ensures the firm maintains the liquidity necessary to pursue large-scale, complex projects in the aviation and transportation sectors. This leadership role involves managing financial risk and ensuring compliance with international accounting standards across diverse jurisdictions. By optimizing the firm's capital structure, Terry Paterni directly impacts the firm's ability to invest in sustainable design research and development. Paterni works closely with the executive team to align financial performance with the firm's strategic goals. Through the management of financial assets and liabilities, the Senior Vice President & Chief Financial Officer secures the firm's economic stability, enabling the continued delivery of high-performance built environments for clients worldwide.
    Terry Paterni

    Thomas Robson - Chief Operating Officer

    Thomas Robson, the Chief Operating Officer at HOK, directs the day-to-day business operations and project delivery processes across the firm's global network. Overseeing internal workflows and resource management, the Chief Operating Officer ensures that design, engineering, and planning teams operate with maximum efficiency. This leadership role involves streamlining project execution to meet the rigorous demands of clients in the sports, recreation, and mixed-use sectors. By optimizing operational capacity, Thomas Robson directly impacts the firm's ability to deliver high-performance environments on time and within budget. Robson coordinates with regional office leaders to maintain consistent quality standards across North America, Europe, and Asia. Through the implementation of scalable operational frameworks, the Chief Operating Officer supports the firm's mission of creating sustainable built environments, ensuring that the firm's internal processes remain as innovative and robust as the architectural designs produced for clients.

    Carl Galioto - President

    Carl Galioto, the President at HOK, leads the firm's design excellence initiatives and oversees the quality of architectural output across all global offices. Overseeing the integration of sustainable design principles into every project, the President ensures that the firm's work consistently meets the highest standards of performance and environmental responsibility. This leadership role involves mentoring design teams and fostering a culture of innovation in architecture and engineering. By driving the firm's design philosophy, Carl Galioto directly impacts the firm's reputation for creating high-performance, sustainable built environments. Galioto collaborates with other executives to align design goals with the firm's broader business objectives. Through the promotion of design excellence, the President ensures that the firm remains a leader in the industry, delivering projects that not only meet client needs but also contribute positively to the built environment and the communities served.
    Carl Galioto

    Mei-Hwie Sie - President

    Mei-Hwie Sie, the President at HOK, directs the firm's market expansion and client relationship management strategies. Overseeing the development of new business opportunities in the science, technology, and higher education sectors, the President ensures that the firm's expertise is effectively communicated to potential clients globally. This leadership role involves identifying emerging market trends and positioning the firm to address the evolving needs of the built environment. By cultivating strong client partnerships, Mei-Hwie Sie directly impacts the firm's growth and project pipeline. Sie coordinates with regional leaders to ensure that the firm's services are tailored to the specific requirements of diverse geographic markets. Through the strategic management of client relations and market development, the President supports the firm's mission, ensuring that the firm continues to deliver high-performance, sustainable design solutions that address the most pressing challenges in modern architecture and urban planning.

    James Vandezande - Chief Technology Officer

    James Vandezande, the Chief Technology Officer at HOK, architects the digital infrastructure and design technology platforms that power the firm's global projects. Overseeing the implementation of advanced modeling and simulation tools, the Chief Technology Officer ensures the firm remains at the forefront of sustainable design and engineering innovation. This leadership role involves integrating complex data systems to reduce energy use intensity across the firm's diverse project portfolio. By driving the adoption of cutting-edge software and collaborative design workflows, James Vandezande directly impacts the efficiency and precision of architectural delivery. Vandezande collaborates with project teams to solve technical challenges in high-stakes sectors like healthcare and science. Through the strategic deployment of technology, the Chief Technology Officer enables the firm to push the boundaries of modern architecture, ensuring that every project meets the highest standards of performance and environmental responsibility.
    James Vandezande

    John Bartolomi - Chief Information Officer

    John Bartolomi, the Chief Information Officer at HOK, manages the firm's enterprise information systems and data security protocols. Overseeing the digital connectivity of offices spanning North America, Europe, and Asia, the Chief Information Officer ensures that global teams collaborate securely and effectively on complex design projects. This leadership role involves protecting the firm's intellectual property and maintaining the integrity of project data across all sectors, including federal government and higher education. By modernizing IT infrastructure, John Bartolomi directly impacts the firm's operational agility and ability to support remote, multi-disciplinary design teams. Bartolomi aligns information technology strategies with the firm's broader goals of sustainable design and high-performance delivery. Through the continuous improvement of digital systems, the Chief Information Officer provides the foundation for seamless communication and data-driven decision-making, ensuring the firm remains a leader in the global architecture and engineering industry.
    John Bartolomi
    Lisa Green, the Chief Legal Officer at HOK, directs the legal strategy and risk mitigation efforts for the global design firm. Overseeing contract negotiations and regulatory compliance, the Chief Legal Officer ensures that the firm's interests are protected across all project sectors, including healthcare, justice, and civic design. This leadership role involves managing complex legal issues related to international operations and intellectual property. By providing expert legal counsel, Lisa Green directly impacts the firm's ability to navigate the legal complexities of large-scale, multi-disciplinary projects. Green collaborates with the executive team to ensure that all business practices align with the firm's commitment to sustainable design and ethical standards. Through the proactive management of legal risks, the Chief Legal Officer supports the firm's mission, ensuring that the firm can continue to deliver innovative and high-performance built environments while maintaining the highest levels of professional integrity.
    Lisa Green

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    Frequently Asked Questions Regarding HOK Top Executives and Leadership Team

    Who leads HOK?
    HOK is led by Susan Williams (Co-Chief Executive Officer At HOK), along with executives such as George Valenti (Chief Financial Officer) and Misty Yanko (Senior Vice President, Chief Financial Officer).
    Who is part of HOK’s executive team?
    The executive team of HOK includes leaders such as Susan Williams (Co-Chief Executive Officer At HOK), George Valenti (Chief Financial Officer), Misty Yanko (Senior Vice President, Chief Financial Officer) and other senior executives.
    How many executives does HOK have?
    HOK has 10 executives leading key business areas.
    What roles are included in HOK’s leadership team?
    The leadership team of HOK includes roles such as Co-Chief Executive Officer At HOK, Chief Financial Officer, Senior Vice President, Chief Financial Officer, Senior Vice President & Chief Financial Officer, Chief Operating Officer.