GHD Executive and Leadership Team

June, 2026

Leadership Overview

GHD has 8 executives leading key functions including strategy, technology, information systems, finance, marketing, legal, and human resources.

Driven by a commitment to integrated solutions, GHD addresses complex challenges in water, energy, and community development, fostering sustainable and resilient outcomes through innovative approaches and a culture of shared ownership.

Leadership Roles at GHD

  • Chief Executive Officer - Jim Giannopoulos
  • Chief Marketing Officer & Interim Chief Executive Officer & Board Member - Guy Longworth
  • Chief Financial Officer - Mark Langevin
  • Chief Technology Officer - Andrew Kaddatz
  • Chief Information Officer - Paul Murphy
  • Chief Marketing Officer & Principal - Andre Ribeiro
  • Chief Legal Officer - Denise Obst
  • Drh - Kouadio Kouame
  • Jim Giannopoulos - Chief Executive Officer

    Jim Giannopoulos, the Chief Executive Officer at GHD, directs the company's global strategy and operational execution. Overseeing all facets of the business, Giannopoulos ensures GHD delivers integrated solutions across engineering, environmental services, design, and construction. This leadership role involves guiding the multidisciplinary team to address complex challenges in water, energy, and community development, prioritizing innovative and forward-looking approaches. By fostering a culture of shared ownership, Jim Giannopoulos drives a long-term commitment to quality and client success, strengthening communities and enhancing infrastructure worldwide. The Chief Executive Officer's focus remains on building lasting partnerships that contribute to a more sustainable future, connecting expertise from diverse regions to respond effectively to both local and global challenges.
    Jim Giannopoulos

    Guy Longworth - Chief Marketing Officer & Interim Chief Executive Officer & Board Member

    Guy Longworth, the Chief Marketing Officer & Interim Chief Executive Officer & Board Member at GHD, provides dual leadership across marketing and executive strategy. Longworth guides the company's market outreach while also steering overall corporate direction during this interim period. This multifaceted role involves overseeing GHD's brand presence and client engagement strategies, alongside ensuring the continuity and execution of the firm's mission in engineering, environmental services, design, and construction. Guy Longworth's leadership focuses on addressing complex challenges in water, energy, and community development, championing innovative and sustainable outcomes. As a Board Member, Longworth contributes to governance and long-term strategic planning, reinforcing GHD's commitment to strengthening communities and building lasting partnerships.
    Guy Longworth

    Mark Langevin - Chief Financial Officer

    Mark Langevin, the Chief Financial Officer at GHD, directs the company's financial strategy and fiscal management. Langevin oversees all financial operations, including budgeting, forecasting, and investment planning, ensuring the firm's financial health and sustainability across its global engineering, environmental services, design, and construction activities. This critical role involves managing financial resources to support innovative approaches and complex project delivery in water, energy, and community development sectors. By maintaining rigorous financial discipline, Mark Langevin enables GHD to pursue long-term growth and deliver exceptional value to clients and stakeholders. The Chief Financial Officer's leadership ensures that GHD's people-owned structure translates into sound financial stewardship, fostering a culture of accountability and commitment to client success.

    Andrew Kaddatz - Chief Technology Officer

    Andrew Kaddatz, the Chief Technology Officer at GHD, architects the firm's technological vision and innovation roadmap. Kaddatz drives the integration of cutting-edge technologies across engineering, environmental services, design, and construction, ensuring GHD remains at the forefront of digital transformation. This leadership position involves identifying and implementing advanced solutions that enhance project delivery, improve operational efficiency, and support sustainable outcomes for clients in water, energy, and community development sectors. By fostering a culture of technological advancement, Andrew Kaddatz empowers the multidisciplinary team to tackle complex challenges with novel approaches. The Chief Technology Officer's strategic direction ensures GHD leverages technology to build resilient infrastructure and strengthen communities globally, connecting global expertise to local needs.
    Andrew Kaddatz

    Paul Murphy - Chief Information Officer

    Paul Murphy, the Chief Information Officer at GHD, manages the company's information systems and digital infrastructure. Murphy oversees the strategic implementation and maintenance of technology solutions that support GHD's global operations in engineering, environmental services, design, and construction. This role is critical in ensuring seamless data flow, robust cybersecurity, and efficient IT support for the multidisciplinary team working on complex water, energy, and community development projects. By optimizing information systems, Paul Murphy enhances collaboration and productivity, enabling the firm to deliver innovative and sustainable outcomes for clients. The Chief Information Officer's leadership ensures that GHD's technological backbone is secure, scalable, and aligned with the company's mission to strengthen communities and build lasting partnerships.

    Andre Ribeiro - Chief Marketing Officer & Principal

    Andre Ribeiro, the Chief Marketing Officer & Principal at GHD, shapes the company's brand strategy and market positioning. Ribeiro leads initiatives to enhance GHD's visibility and reputation across its core sectors of engineering, environmental services, design, and construction. This role involves developing and executing marketing campaigns that highlight GHD's expertise in addressing complex challenges in water, energy, and community development, emphasizing innovative and sustainable solutions. By fostering strong client relationships and market engagement, Andre Ribeiro supports the firm's growth objectives and its mission to strengthen communities. The Chief Marketing Officer & Principal's strategic insights drive market penetration and ensure GHD's message of technical excellence and social responsibility resonates globally.
    Denise Obst, the Chief Legal Officer at GHD, oversees all legal affairs and ensures compliance across the company's global operations. Obst manages legal risks and provides strategic counsel on contractual matters, corporate governance, and regulatory adherence for GHD's engineering, environmental services, design, and construction projects. This position is vital in safeguarding the company's interests while facilitating its mission to deliver integrated solutions for complex challenges in water, energy, and community development. By ensuring robust legal frameworks, Denise Obst supports GHD's commitment to ethical practices and sustainable outcomes. The Chief Legal Officer's expertise is instrumental in maintaining GHD's reputation for quality and client success, fostering trust and accountability in all business dealings.

    Kouadio Kouame - Drh

    Kouadio Kouame, the Drh at GHD, leads human resources strategy and operations for the global professional services firm. Kouame manages talent acquisition, employee development, and organizational culture initiatives, ensuring GHD attracts and retains skilled professionals across engineering, environmental services, design, and construction. This role is crucial in fostering a supportive and collaborative work environment that empowers the multidisciplinary team to address complex challenges in water, energy, and community development. By championing people-centric policies, Kouadio Kouame reinforces GHD's commitment to its people-owned structure and long-term success. The Drh's focus on talent management ensures GHD continues to deliver innovative solutions and strengthen communities worldwide.

    Explore Leadership Teams in Architecture, Engineering & Design

    Frequently Asked Questions Regarding GHD Top Executives and Leadership Team

    Who leads GHD?
    GHD is led by Jim Giannopoulos (Chief Executive Officer), along with executives such as Guy Longworth (Chief Marketing Officer & Interim Chief Executive Officer & Board Member) and Mark Langevin (Chief Financial Officer).
    Who is part of GHD’s executive team?
    The executive team of GHD includes leaders such as Jim Giannopoulos (Chief Executive Officer), Guy Longworth (Chief Marketing Officer & Interim Chief Executive Officer & Board Member), Mark Langevin (Chief Financial Officer) and other senior executives.
    How many executives does GHD have?
    GHD has 8 executives leading key business areas.
    What roles are included in GHD’s leadership team?
    The leadership team of GHD includes roles such as Chief Executive Officer, Chief Marketing Officer & Interim Chief Executive Officer & Board Member, Chief Financial Officer, Chief Technology Officer, Chief Information Officer.