TGS Executive and Leadership Team

June, 2026

Leadership Overview

TGS has 10 executives leading key functions including strategy, finance, operations, and regional development.

Driven by innovation, TGS provides essential geoscience data and services, shaping the future of the oil and gas industry through advanced analytics and comprehensive data solutions.

Leadership Roles at TGS

  • Chief Executive Officer - Yi Raj
  • Founder & Chief Executive Officer - Abdulazeez Idirisu
  • Co-Chief Executive Officer - Tafadzwa Tandi
  • Chief Financial Officer - Christopher Lee
  • President - Tim Sullivan
  • Regional President - Orjan Myrvold
  • President - Gary Mixon
  • President - Tirso Serrano
  • President - Mark Evershed
  • Chief Operations Officer - Ibrahim Sungur
  • Yi Raj - Chief Executive Officer

    Yi Raj, the Chief Executive Officer at TGS, directs the company's overall strategic vision and operational execution. This leadership role involves guiding TGS's global expansion and ensuring alignment with market demands for geoscience data products and services. Yi Raj oversees the integration of advanced technologies, including seismic data acquisition and processing, to enhance the value delivered to clients in the oil and gas sector. The Chief Executive Officer's responsibilities extend to fostering innovation within the geophysical and geological services divisions, ensuring TGS maintains its competitive edge. By driving forward the company's mission, Yi Raj ensures the delivery of critical data and analytics solutions that support exploration and production activities worldwide. This executive's focus remains on optimizing resource allocation and maximizing shareholder value through robust business strategies.

    Abdulazeez Idirisu - Founder & Chief Executive Officer

    Abdulazeez Idirisu, the Founder & Chief Executive Officer at TGS, established the company's foundational principles and continues to shape its long-term trajectory. This executive's role involves setting the strategic direction for TGS's global operations, emphasizing innovation in geoscience data acquisition and interpretation. Abdulazeez Idirisu guides the development of new service offerings, including advanced seismic and electromagnetic data solutions, to meet the evolving needs of the oil and gas industry. The Founder & Chief Executive Officer's oversight extends to fostering a culture of scientific excellence and technological advancement across all departments. By championing the company's core mission, Abdulazeez Idirisu ensures TGS remains a leader in providing comprehensive data products and analytics, supporting exploration efforts worldwide. This leadership position is critical for maintaining TGS's market position and driving sustainable growth.

    Tafadzwa Tandi - Co-Chief Executive Officer

    Tafadzwa Tandi, the Co-Chief Executive Officer at TGS, collaborates to define and execute the company's strategic objectives and operational frameworks. This leadership position involves driving TGS's global business development initiatives and ensuring the seamless delivery of geoscience data and services. Tafadzwa Tandi oversees the integration of advanced geophysical and geological technologies, enhancing the company's portfolio of seismic, gravity, and magnetic data. The Co-Chief Executive Officer's responsibilities include fostering strong client relationships and expanding market reach across key international regions. By working in tandem with other executive leaders, Tafadzwa Tandi ensures TGS remains at the forefront of data management and analytics solutions for the oil and gas sector. This executive's focus is on optimizing operational efficiency and driving revenue growth through strategic partnerships and service innovation.

    Christopher Lee - Chief Financial Officer

    Christopher Lee, the Chief Financial Officer at TGS, directs all financial planning, management, and reporting activities for the global organization. This executive's responsibilities include overseeing capital allocation, managing investor relations, and ensuring fiscal discipline across all operational units. Christopher Lee guides the financial strategy to support TGS's investments in advanced geoscience data acquisition and processing technologies, including seismic and electromagnetic surveys. The Chief Financial Officer's role is critical in evaluating new business opportunities and managing financial risks associated with international market fluctuations. By ensuring robust financial controls and transparent reporting, Christopher Lee supports the company's mission to provide high-value data products and services to the oil and gas industry. This leadership ensures TGS maintains a strong financial foundation for sustained growth and operational excellence.

    Tim Sullivan - President

    Tim Sullivan, the President at TGS, drives strategic initiatives and operational oversight across key business segments. This executive's role involves leading market development efforts and ensuring the effective deployment of TGS's geoscience data products and services. Tim Sullivan oversees the expansion of the company's geophysical multi-client data library, including seismic and electromagnetic datasets, to meet global exploration demands. The President's responsibilities encompass fostering cross-functional collaboration to enhance data integration solutions and interpretation products for clients in the oil and gas industry. By focusing on client needs and market trends, Tim Sullivan ensures TGS maintains its leadership position in providing advanced imaging and analytics services. This executive's leadership is crucial for driving growth and innovation within the company's service offerings.

    Orjan Myrvold - Regional President

    Orjan Myrvold, the Regional President at TGS, directs operations and strategic growth within designated geographic territories. This executive's focus is on expanding TGS's market presence and client engagement across critical oil and gas regions. Orjan Myrvold oversees the delivery of specialized geoscience data products, including seismic and gravity data, tailored to regional exploration needs. The Regional President's responsibilities include managing local teams, fostering client relationships, and ensuring the effective implementation of TGS's data management and analytics solutions. By aligning regional strategies with global objectives, Orjan Myrvold contributes to the company's overall mission of providing essential data services. This leadership role is pivotal in driving regional revenue and market share growth.

    Gary Mixon - President

    Gary Mixon, the President at TGS, spearheads strategic growth and operational excellence in key market areas. This executive's leadership focuses on enhancing TGS's portfolio of geoscience data and services, particularly in seismic data and advanced processing techniques. Gary Mixon oversees the development and deployment of innovative solutions, including interpretation products and data integration services, to support oil and gas exploration activities. The President's responsibilities involve strengthening client partnerships and identifying new opportunities for market penetration. By driving operational efficiency and technological advancement, Gary Mixon ensures TGS remains a preferred provider of geophysical and geological data. This executive's strategic direction is vital for expanding the company's global footprint and service capabilities.

    Tirso Serrano - President

    Tirso Serrano, the President at TGS, drives strategic initiatives and operational performance across designated business units. This executive's role involves leading the expansion of TGS's geoscience data offerings, including seismic and electromagnetic datasets, to serve the global oil and gas industry. Tirso Serrano oversees the implementation of advanced imaging and processing services, such as time-lapse and wide azimuth data processing, to enhance exploration insights. The President's responsibilities include fostering innovation in data analytics solutions and ensuring the highest quality of service delivery. By focusing on market dynamics and client requirements, Tirso Serrano ensures TGS provides critical data products that support exploration and production strategies. This leadership is essential for maintaining TGS's competitive advantage and driving sustainable business growth.

    Mark Evershed - President

    Mark Evershed, the President at TGS, directs strategic planning and operational execution for key global markets. This executive's leadership focuses on advancing TGS's capabilities in providing comprehensive geoscience data and services to the oil and gas sector. Mark Evershed oversees the expansion of the company's geophysical multi-client data library, emphasizing seismic data and advanced interpretation products. The President's responsibilities include driving innovation in data analytics solutions and ensuring the efficient delivery of services such as depth and time imaging. By cultivating strong client relationships and adapting to industry trends, Mark Evershed ensures TGS remains a leader in exploration technology. This executive's strategic vision is critical for enhancing TGS's market position and driving long-term value.

    Ibrahim Sungur - Chief Operations Officer

    Ibrahim Sungur, the Chief Operations Officer at TGS, oversees the company's global operational infrastructure and service delivery. This executive's mandate includes optimizing the efficiency of data acquisition, processing, and interpretation across all TGS facilities worldwide. Ibrahim Sungur directs the implementation of advanced technologies in seismic imaging, well log analysis, and data integration solutions, ensuring TGS provides cutting-edge services to the oil and gas sector. The Chief Operations Officer's responsibilities extend to managing supply chain logistics and ensuring the highest standards of safety and quality in all field operations. By streamlining workflows and enhancing resource utilization, Ibrahim Sungur supports TGS's mission to deliver reliable and comprehensive geoscience data. This leadership is vital for maintaining operational excellence and driving innovation in data management.

    Explore Leadership Teams in Business Services

    Frequently Asked Questions Regarding TGS Top Executives and Leadership Team

    Who leads TGS?
    TGS is led by Yi Raj (Chief Executive Officer), along with executives such as Abdulazeez Idirisu (Founder & Chief Executive Officer) and Tafadzwa Tandi (Co-Chief Executive Officer).
    Who is part of TGS’s executive team?
    The executive team of TGS includes leaders such as Yi Raj (Chief Executive Officer), Abdulazeez Idirisu (Founder & Chief Executive Officer), Tafadzwa Tandi (Co-Chief Executive Officer) and other senior executives.
    How many executives does TGS have?
    TGS has 10 executives leading key business areas.
    What roles are included in TGS’s leadership team?
    The leadership team of TGS includes roles such as Chief Executive Officer, Founder & Chief Executive Officer, Co-Chief Executive Officer, Chief Financial Officer, President.