ISG Executive and Leadership Team

October, 2026

Leadership Overview

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

Committed to delivering multidisciplinary design and engineering solutions, ISG empowers communities through thoughtful architecture, environmental planning, and infrastructure development to improve how people live and work.

Leadership Roles at ISG

  • Chief Executive Officer - Lynn Bruns
  • Principal Chief Executive Officer - Fausto Florentino
  • Chief Financial Officer - Alec Pfeffer
  • Chief Operating Officer - Andy Brandel
  • Lynn Bruns - Chief Executive Officer

    Lynn Bruns, the Chief Executive Officer at ISG, directs the overarching corporate strategy and long-term vision for the firm. By aligning multidisciplinary design teams with client needs, 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 evaluate market trends and identify growth opportunities within the infrastructure sector. By prioritizing sustainable environmental solutions, the Chief Executive Officer strengthens the firm's market position. Through consistent focus on operational excellence, the Chief Executive Officer supports the delivery of complex projects that enhance community spaces. Ultimately, the Chief Executive Officer secures the firm's reputation as a leader in the design and engineering industry.

    Fausto Florentino - Principal Chief Executive Officer

    Fausto Florentino, the Principal Chief Executive Officer at ISG, architects the firm's high-level planning initiatives and strategic partnerships. Focusing on the expansion of environmental and infrastructure services, the Principal Chief Executive Officer drives innovation across diverse project portfolios. Fausto Florentino manages complex stakeholder relationships, ensuring that large-scale developments align with the firm's mission to improve community living standards. This leadership role requires deep integration with technical teams to translate complex engineering requirements into actionable design solutions. By overseeing the firm's broader market impact, the Principal Chief Executive Officer maintains competitive advantages in the architecture sector. The Principal Chief Executive Officer also coordinates with other executive leaders to streamline project delivery cycles. Through meticulous attention to detail and strategic foresight, the Principal Chief Executive Officer ensures that every project contributes to the long-term success and sustainability of the organization.

    Alec Pfeffer - Chief Financial Officer

    Alec Pfeffer, the Chief Financial Officer at ISG, manages the firm's fiscal health and capital allocation strategies. Overseeing financial reporting, budgeting, and risk management, the Chief Financial Officer ensures that resources support the firm's multidisciplinary design and engineering goals. Alec Pfeffer directs the financial planning necessary for scaling infrastructure projects across various regions. This leadership role involves close coordination with the executive team to optimize profitability while maintaining the firm's commitment to employee ownership. By implementing robust financial controls, the Chief Financial Officer mitigates operational risks and supports sustainable growth. The Chief Financial Officer also evaluates investment opportunities in new technologies that enhance design capabilities. Through rigorous analysis of market data, the Chief Financial Officer provides the insights required for informed decision-making. Ultimately, the Chief Financial Officer maintains the financial stability required to deliver high-impact community projects.
    Alec Pfeffer

    Andy Brandel - Chief Operating Officer

    Andy Brandel, the Chief Operating Officer at ISG, directs the daily execution of architecture and engineering operations. By streamlining internal processes and project management workflows, the Chief Operating Officer ensures that multidisciplinary teams deliver high-quality results on time. Andy Brandel oversees the integration of environmental and infrastructure services, maintaining efficiency across all project phases. This leadership role involves managing resource allocation to support the firm's commitment to community-focused design. By fostering collaboration between departments, the Chief Operating Officer drives operational excellence and project consistency. The Chief Operating Officer also monitors performance metrics to identify areas for process improvement and technological adoption. Through active management of operational capacity, the Chief Operating Officer supports the firm's ability to handle complex, large-scale developments. Ultimately, the Chief Operating Officer ensures that the firm's internal operations align with the overarching mission of improving how people live and work.
    Andy Brandel

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    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 Alec Pfeffer (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), Alec Pfeffer (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.