CGS Executive and Leadership Team

July, 2026

Leadership Overview

CGS has 10 executives leading key functions including strategy, information technology, human resources, marketing, and operations.

Driven by a commitment to client success, CGS delivers comprehensive solutions that address complex, multi-dimensional business needs, solidifying its market position through innovation and dedicated service.

Leadership Roles at CGS

  • Chief Executive Officer - Patcharanon Cheevakrianggrai
  • Founder & Chief Executive Officer - David Chestnut
  • Owner and President of Hydrogeologic Consulting Company - Kenrick Lee
  • Division President, Learning - Douglas Stephen
  • President - Steven Polsky
  • Chief Information Officer - Michael Fitzpatrick
  • Senior Vice President, Global Chief Information Officer - James Tietjen
  • Senior VP, Human Resources & Chief Human Resources Officer - Savio Rebelo
  • Chief Marketing Officer & Senior VP - David Grabert
  • Jefe De Personal - Mauricio Sotomayor
  • Patcharanon Cheevakrianggrai - Chief Executive Officer

    Patcharanon Cheevakrianggrai, the Chief Executive Officer at CGS, directs the overarching corporate strategy and operational execution. This leadership role involves guiding the company's global expansion and ensuring alignment with its core mission of providing comprehensive solutions for complex client needs. Cheevakrianggrai oversees the integration of diverse service offerings, including software applications, enterprise learning, and customer experience services, to deliver unified value. The Chief Executive Officer's focus remains on driving innovation and maintaining CGS's competitive edge in the global market. By fostering strategic partnerships and optimizing resource allocation across all divisions, Patcharanon Cheevakrianggrai ensures sustained growth and operational excellence. This executive champions the company's commitment to meeting fundamental business activities for clients worldwide.

    David Chestnut - Founder & Chief Executive Officer

    David Chestnut, the Founder & Chief Executive Officer at CGS, established the company's foundational principles and continues to shape its strategic direction. This executive guides the long-term vision, focusing on innovation and client-centric solutions that address multi-dimensional business requirements. Chestnut's leadership ensures that CGS remains at the forefront of delivering comprehensive software applications, enterprise learning, and customer experience services. The Founder & Chief Executive Officer's role involves fostering a culture of excellence and driving the company's global presence across North America, South America, Europe, the Middle East, and Asia. By championing new technological advancements and market opportunities, David Chestnut reinforces CGS's commitment to supporting clients' most fundamental business activities. This leadership ensures the company's enduring impact and market relevance.

    Kenrick Lee - Owner and President of Hydrogeologic Consulting Company

    Kenrick Lee, the Owner and President of Hydrogeologic Consulting Company at CGS, leads specialized consulting services focused on hydrogeology and environmental solutions. This executive directs strategic initiatives within this niche, ensuring the delivery of expert technical services to clients. Lee's leadership involves overseeing project management, client relations, and the application of scientific expertise to address complex environmental challenges. The Owner and President of Hydrogeologic Consulting Company's role is to drive growth and innovation within this specific division, aligning its services with CGS's broader mission. By providing specialized consulting, Kenrick Lee enhances the company's ability to offer multi-dimensional solutions. This executive's focus is on maintaining high standards of technical excellence and client satisfaction.

    Douglas Stephen - Division President, Learning

    Douglas Stephen, the Division President, Learning at CGS, directs the strategy and operations for the company's enterprise learning solutions. This executive oversees the development and delivery of innovative learning programs designed to meet complex client needs in areas such as workforce development and skill enhancement. Stephen's leadership focuses on leveraging immersive technologies and digital platforms to create engaging and effective educational experiences. The Division President, Learning's responsibilities include managing curriculum design, instructional technology integration, and client partnerships. By ensuring the quality and impact of learning services, Douglas Stephen supports CGS's commitment to providing comprehensive solutions that drive client success. This executive's vision is crucial for advancing the company's educational offerings globally.

    Steven Polsky - President

    Steven Polsky, the President at CGS, oversees key operational divisions and drives strategic initiatives to enhance the company's service portfolio. This executive plays a critical role in ensuring the seamless integration of software applications, enterprise learning, and customer experience services. Polsky's leadership focuses on optimizing operational efficiency and fostering cross-functional collaboration to meet complex, multi-dimensional client requirements. The President's responsibilities include managing P&L for assigned divisions and identifying opportunities for market expansion. By championing operational excellence, Steven Polsky supports CGS's mission to deliver fundamental business activities for clients worldwide. This executive's strategic oversight is vital for sustained growth and market competitiveness.

    Michael Fitzpatrick - Chief Information Officer

    Michael Fitzpatrick, the Chief Information Officer at CGS, architects and manages the company's internal technology infrastructure and digital transformation initiatives. This leadership position involves overseeing the strategic implementation of software applications and ensuring the security and efficiency of all IT operations. Fitzpatrick drives the adoption of advanced technologies to support CGS's global service delivery, including customer experience and call center outsourcing. The Chief Information Officer's responsibilities extend to optimizing data management and cybersecurity protocols across all operational regions. By ensuring robust technological frameworks, Michael Fitzpatrick directly supports the company's mission to meet complex client needs. This executive's focus is on leveraging information technology to enhance service offerings and maintain a competitive advantage in the global marketplace.

    James Tietjen - Senior Vice President, Global Chief Information Officer

    James Tietjen, the Senior Vice President, Global Chief Information Officer at CGS, directs the global IT strategy and operational execution, ensuring seamless technology integration across all business units. This executive oversees the deployment of enterprise-level software solutions and manages the company's extensive technology infrastructure, supporting diverse client needs worldwide. Tietjen's leadership focuses on enhancing cybersecurity measures and driving digital innovation to optimize service delivery in areas like immersive technologies and customer experience. The Senior Vice President, Global Chief Information Officer's role involves collaborating with regional IT teams to ensure compliance and efficiency. By championing technological advancements, James Tietjen ensures CGS maintains its position as a provider of comprehensive, multi-dimensional solutions. This executive's efforts are critical to supporting fundamental business activities globally.
    James Tietjen

    Savio Rebelo - Senior VP, Human Resources & Chief Human Resources Officer

    Savio Rebelo, the Senior VP, Human Resources & Chief Human Resources Officer at CGS, leads all global human capital strategies and talent management initiatives. This executive is responsible for cultivating a high-performance culture that supports CGS's mission of delivering comprehensive client solutions. Rebelo oversees talent acquisition, employee development, and compensation programs across North America, South America, Europe, the Middle East, and Asia. The Senior VP, Human Resources & Chief Human Resources Officer's role involves ensuring robust HR policies that align with business objectives and foster employee engagement. By developing strategic workforce plans, Savio Rebelo ensures CGS has the skilled personnel necessary to meet complex, multi-dimensional client needs. This leadership is vital for operational continuity and growth.
    Savio Rebelo

    David Grabert - Chief Marketing Officer & Senior VP

    David Grabert, the Chief Marketing Officer & Senior VP at CGS, directs global marketing strategies and brand development initiatives. This executive oversees the promotion of CGS's comprehensive software applications, enterprise learning, and customer experience services to a diverse international clientele. Grabert's leadership focuses on driving market penetration and enhancing CGS's reputation as a provider of innovative solutions. The Chief Marketing Officer & Senior VP's responsibilities include managing digital marketing campaigns, public relations, and market research to identify emerging opportunities. By articulating the company's value proposition, David Grabert ensures CGS effectively communicates its ability to meet complex, multi-dimensional client needs. This role is critical for sustained business development and market leadership.

    Mauricio Sotomayor - Jefe De Personal

    Mauricio Sotomayor, the Jefe De Personal at CGS, manages human resources functions and personnel administration within specific operational regions. This executive ensures the effective implementation of HR policies and supports employee relations to foster a productive work environment. Sotomayor's responsibilities include overseeing recruitment processes, managing employee records, and ensuring compliance with local labor laws. The Jefe De Personal plays a key part in supporting the broader human capital strategies that enable CGS to deliver its comprehensive software applications and customer experience services. By focusing on local talent management, Mauricio Sotomayor contributes to the overall operational efficiency and client support capabilities of the company across its global footprint.

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    Frequently Asked Questions Regarding CGS Top Executives and Leadership Team

    Who leads CGS?
    CGS is led by Patcharanon Cheevakrianggrai (Chief Executive Officer), along with executives such as David Chestnut (Founder & Chief Executive Officer) and Kenrick Lee (Owner and President of Hydrogeologic Consulting Company).
    Who is part of CGS’s executive team?
    The executive team of CGS includes leaders such as Patcharanon Cheevakrianggrai (Chief Executive Officer), David Chestnut (Founder & Chief Executive Officer), Kenrick Lee (Owner and President of Hydrogeologic Consulting Company) and other senior executives.
    How many executives does CGS have?
    CGS has 10 executives leading key business areas.
    What roles are included in CGS’s leadership team?
    The leadership team of CGS includes roles such as Chief Executive Officer, Founder & Chief Executive Officer, Owner and President of Hydrogeologic Consulting Company, Division President, Learning, President.