ISG Executive and Leadership Team

November, 2026

Leadership Overview

ISG has 4 executives leading key functions including strategy, executive leadership, financial management, and operational oversight.

Focused on delivering multidisciplinary design and engineering solutions, ISG empowers communities through thoughtful architecture, planning, and infrastructure development to improve the quality of life for people across diverse regions.

Leadership Roles at ISG

  • Chief Executive Officer - Lynn Bruns
  • Principal Chief Executive Officer - Fausto Florentino
  • Chief Financial Officer - Donald McEnteer
  • Chief Operating Officer - Andy Brandel
  • Lynn Bruns - Chief Executive Officer

    Lynn Bruns, the Chief Executive Officer at ISG, directs the overarching strategic vision and long-term growth initiatives for the firm. By aligning multidisciplinary design teams with client goals, the Chief Executive Officer ensures that architecture and engineering projects meet rigorous quality standards. Lynn Bruns fosters a culture of employee ownership, driving engagement across all regional offices to maintain high performance. This leadership role involves constant collaboration with the Board to refine market positioning and expand the reach of environmental and infrastructure solutions. Through the implementation of sustainable design practices, the Chief Executive Officer strengthens the firm's reputation as a leader in the construction industry. By prioritizing innovation and community impact, the Chief Executive Officer secures the future stability of the organization while delivering exceptional value to partners and stakeholders throughout the United States.

    Fausto Florentino - Principal Chief Executive Officer

    Fausto Florentino, the Principal Chief Executive Officer at ISG, architects the high-level corporate governance and executive management frameworks necessary for complex multidisciplinary operations. The Principal Chief Executive Officer oversees the integration of planning and environmental services, ensuring that every project aligns with the firm's commitment to strengthening places. Fausto Florentino drives the expansion of infrastructure capabilities, focusing on large-scale developments that require sophisticated engineering expertise. This role demands close coordination with other executive leaders to synchronize business development efforts and maintain operational excellence. By championing a collaborative approach to design, the Principal Chief Executive Officer enhances the firm's ability to solve intricate community challenges. Through the application of rigorous management standards, the Principal Chief Executive Officer ensures that the organization remains at the forefront of the architecture and engineering sector, consistently delivering impactful results for clients.

    Donald McEnteer - Chief Financial Officer

    Donald McEnteer, the Chief Financial Officer at ISG, manages the fiscal health and capital allocation strategies for the firm. The Chief Financial Officer directs financial planning, budgeting, and risk management processes to support the multidisciplinary design and engineering operations. Donald McEnteer ensures that the firm maintains a robust balance sheet, enabling continued investment in infrastructure and environmental projects. This leadership role involves providing critical data-driven insights to the executive team, facilitating informed decision-making regarding market expansion and resource distribution. By optimizing financial performance, the Chief Financial Officer supports the long-term sustainability of the employee-owned model. Through the oversight of fiscal compliance and reporting, the Chief Financial Officer protects the interests of the firm and its partners. This position remains essential for maintaining the financial agility required to navigate the competitive landscape of the construction and architecture industry.

    Andy Brandel - Chief Operating Officer

    Andy Brandel, the Chief Operating Officer at ISG, executes the daily operational strategies that drive the firm's multidisciplinary design and engineering projects. The Chief Operating Officer oversees internal workflows, project delivery systems, and resource management to ensure efficiency across all departments. Andy Brandel coordinates with project managers to maintain high standards in architecture, planning, and infrastructure development. This leadership role involves streamlining processes to improve how people live and work through better design outcomes. By focusing on operational scalability, the Chief Operating Officer enables the firm to handle complex, large-scale projects across diverse geographic markets. Through the implementation of advanced project management tools, the Chief Operating Officer enhances team productivity and project turnaround times. This position remains vital for ensuring that the firm's operational capabilities consistently meet the evolving needs of communities and organizations.
    Andy Brandel

    Explore Leadership Teams in Architecture, Engineering & Design

    Frequently Asked Questions Regarding ISG Top Executives and Leadership Team

    Who leads ISG?
    ISG is led by Lynn Bruns (Chief Executive Officer), along with executives such as Fausto Florentino (Principal Chief Executive Officer) and Donald McEnteer (Chief Financial Officer).
    Who is part of ISG’s executive team?
    The executive team of ISG includes leaders such as Lynn Bruns (Chief Executive Officer), Fausto Florentino (Principal Chief Executive Officer), Donald McEnteer (Chief Financial Officer) and other senior executives.
    How many executives does ISG have?
    ISG has 4 executives leading key business areas.
    What roles are included in ISG’s leadership team?
    The leadership team of ISG includes roles such as Chief Executive Officer, Principal Chief Executive Officer, Chief Financial Officer, Chief Operating Officer.