CGS Executive and Leadership Team

October, 2026

Leadership Overview

CGS has 10 executives leading key functions including corporate strategy, global operations, financial management, and human resources.

Focused on delivering comprehensive software and outsourcing solutions, CGS drives digital transformation for clients through immersive technologies and enterprise learning services across global markets.

Leadership Roles at CGS

  • Founder & Chief Executive Officer - David Chestnut
  • Chairman & Chief Executive Officer - Phil Friedman
  • Senior Vice President and Group Chief Financial Officer - Mark Macmanus
  • President - Paul Magel
  • Owner and President of Hydrogeologic Consulting Company - Kenrick Lee
  • 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
  • Managing Director - Tony Mather
  • David Chestnut - Founder & Chief Executive Officer

    David Chestnut, the Founder & Chief Executive Officer at CGS, directs the long-term vision and strategic trajectory of the organization. By prioritizing the development of software applications and enterprise learning platforms, Chestnut ensures the company maintains a competitive edge in the global technology consulting landscape. This leadership role involves constant evaluation of market trends across North America, Europe, and Asia to identify new growth opportunities. David Chestnut actively collaborates with the board to align operational goals with the evolving needs of enterprise clients. Through the implementation of rigorous performance standards, the Founder & Chief Executive Officer fosters a culture of innovation and excellence. This commitment to high-quality service delivery supports the expansion of the company's immersive technology portfolio, ultimately securing the firm's position as a premier provider of complex business solutions.

    Phil Friedman - Chairman & Chief Executive Officer

    Phil Friedman, the Chairman & Chief Executive Officer at CGS, oversees the governance and high-level strategic execution of the firm. Friedman manages the integration of customer experience and call center outsourcing services to ensure seamless delivery for global clients. By maintaining oversight of international operations, the Chairman & Chief Executive Officer drives efficiency across diverse geographic regions including the Middle East and South America. Phil Friedman facilitates critical decision-making processes that balance immediate client requirements with long-term corporate sustainability. This executive role requires constant engagement with stakeholders to refine the company's value proposition in the software and technology consulting sectors. Through the application of deep industry expertise, Friedman optimizes organizational structures to support complex, multi-dimensional client needs. This leadership approach ensures that the company remains agile while scaling its global footprint in the competitive enterprise services market.

    Mark Macmanus - Senior Vice President and Group Chief Financial Officer

    Mark Macmanus, the Senior Vice President and Group Chief Financial Officer at CGS, directs the financial planning, reporting, and capital allocation strategies for the organization. Macmanus manages the fiscal health of the company by overseeing budgeting processes and financial performance analysis across all global business units. By ensuring accurate financial oversight, the Senior Vice President and Group Chief Financial Officer supports the firm's ability to invest in new software applications and immersive technologies. Mark Macmanus collaborates with the executive team to evaluate the financial viability of new market expansions and service offerings. This role involves managing relationships with investors and ensuring compliance with international financial regulations. Through the implementation of robust financial controls, the Senior Vice President and Group Chief Financial Officer drives operational efficiency and long-term profitability. Macmanus provides the fiscal foundation necessary for the company to meet the complex, multi-dimensional needs of its global client base.

    Paul Magel - President

    Paul Magel, the President at CGS, directs the day-to-day operations and execution of the company's core business activities. Magel manages the delivery of software and outsourcing services, ensuring that client projects are completed to the highest standards of quality and efficiency. By overseeing the operational teams, the President drives the implementation of strategies that address the complex, multi-dimensional needs of enterprise clients. Paul Magel coordinates with other C-suite leaders to ensure that operational workflows align with the firm's broader technological and financial goals. This role involves monitoring service performance across global regions and identifying opportunities for process improvement. Through the application of deep operational expertise, the President fosters a culture of accountability and excellence. Magel ensures that the company remains responsive to client demands while maintaining the scalability required to support growth in the competitive technology consulting and enterprise services market.

    Kenrick Lee - Owner and President of Hydrogeologic Consulting Company

    Kenrick Lee, the Owner and President of Hydrogeologic Consulting Company at CGS, directs specialized consulting services that integrate technical expertise with the firm's broader enterprise solutions. Lee manages the delivery of niche hydrogeologic projects, ensuring that these services meet the specific, complex requirements of clients in the environmental and industrial sectors. By leveraging deep domain knowledge, the Owner and President of Hydrogeologic Consulting Company drives the development of specialized service offerings that complement the company's core software and technology portfolio. Kenrick Lee coordinates with cross-functional teams to integrate these specialized services into the firm's global delivery model. This role involves managing client relationships and identifying new opportunities for growth within the environmental consulting space. Through the application of technical precision, the Owner and President of Hydrogeologic Consulting Company supports the firm's mission of providing comprehensive, multi-dimensional solutions to a diverse and demanding global clientele.

    Michael Fitzpatrick - Chief Information Officer

    Michael Fitzpatrick, the Chief Information Officer at CGS, architects the internal digital infrastructure and security frameworks necessary to support global operations. Fitzpatrick manages the deployment of advanced software applications and data systems that underpin the company's service delivery models. By overseeing the technological backbone of the organization, the Chief Information Officer ensures that all enterprise learning and outsourcing platforms remain secure and scalable. Michael Fitzpatrick collaborates with other C-suite leaders to integrate new immersive technologies into the existing service portfolio. This leadership role involves mitigating cybersecurity risks while simultaneously driving digital transformation initiatives across the firm's international offices. Through the optimization of IT resources, the Chief Information Officer supports the company's ability to handle complex, multi-dimensional client requirements. Fitzpatrick maintains a focus on technological agility, ensuring that the firm's infrastructure evolves in tandem with the rapidly changing demands of the global technology consulting industry.

    James Tietjen - Senior Vice President, Global Chief Information Officer

    James Tietjen, the Senior Vice President, Global Chief Information Officer at CGS, directs the global strategy for information technology and digital innovation. Tietjen manages the implementation of enterprise-wide software solutions that enhance the efficiency of customer experience and call center outsourcing services. By leading large-scale technology projects, the Senior Vice President, Global Chief Information Officer ensures that the firm's digital capabilities remain at the forefront of the industry. James Tietjen coordinates with regional IT teams to standardize systems across North America, Europe, and Asia. This role involves evaluating emerging technologies to determine their potential impact on the company's service offerings. Through the strategic management of technical assets, the Senior Vice President, Global Chief Information Officer drives operational excellence and supports the firm's commitment to meeting complex client needs. Tietjen ensures that all technological investments align with the company's long-term goals for growth and market leadership.
    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, directs the global talent strategy and organizational development initiatives. Rebelo manages the recruitment, retention, and professional growth of the workforce to ensure the company possesses the expertise required for high-level software and technology consulting. By fostering a culture of continuous learning, the Senior VP, Human Resources & Chief Human Resources Officer aligns employee performance with the firm's mission of delivering comprehensive solutions. Savio Rebelo oversees human capital operations across all international offices, ensuring compliance and cultural cohesion. This leadership role involves designing compensation and development programs that attract top-tier talent in the competitive enterprise services market. Through the implementation of strategic HR policies, the Senior VP, Human Resources & Chief Human Resources Officer drives organizational efficiency and supports the company's ability to meet the complex, multi-dimensional needs of global clients.
    Savio Rebelo

    David Grabert - Chief Marketing Officer & Senior VP

    David Grabert, the Chief Marketing Officer & Senior VP at CGS, directs the global brand strategy and market positioning for the firm's diverse service portfolio. Grabert manages the communication of the company's value proposition in software, enterprise learning, and immersive technologies to target markets worldwide. By analyzing market trends and client feedback, the Chief Marketing Officer & Senior VP ensures that marketing campaigns effectively reach key decision-makers in the technology consulting sector. David Grabert collaborates with sales and product teams to align messaging with the company's strategic growth objectives. This role involves overseeing digital marketing initiatives and public relations efforts that enhance the firm's reputation across North America, Europe, and Asia. Through the development of targeted outreach strategies, the Chief Marketing Officer & Senior VP drives lead generation and supports the firm's expansion into new markets. Grabert ensures that the brand remains synonymous with high-quality, complex business solutions.

    Tony Mather - Managing Director

    Tony Mather, the Managing Director at CGS, directs regional business development and operational performance within specific international markets. Mather focuses on scaling the delivery of enterprise learning and software solutions to meet the unique demands of local client bases. By coordinating with cross-functional teams, the Managing Director ensures that service quality remains consistent with the company's global standards. Tony Mather monitors market shifts and adjusts operational tactics to maintain growth in key territories. This role involves managing client relationships and identifying opportunities for service expansion within the immersive technology sector. Through the implementation of localized strategies, Mather enhances the firm's ability to address complex business activities for diverse organizations. The Managing Director consistently drives revenue growth by aligning regional service offerings with the overarching corporate mission of providing comprehensive, high-impact technology solutions to a global clientele.

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    Frequently Asked Questions Regarding CGS Top Executives and Leadership Team

    Who leads CGS?
    CGS is led by David Chestnut (Founder & Chief Executive Officer), along with executives such as Phil Friedman (Chairman & Chief Executive Officer) and Mark Macmanus (Senior Vice President and Group Chief Financial Officer).
    Who is part of CGS’s executive team?
    The executive team of CGS includes leaders such as David Chestnut (Founder & Chief Executive Officer), Phil Friedman (Chairman & Chief Executive Officer), Mark Macmanus (Senior Vice President and Group Chief Financial Officer) 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 Founder & Chief Executive Officer, Chairman & Chief Executive Officer, Senior Vice President and Group Chief Financial Officer, President, Owner and President of Hydrogeologic Consulting Company.