Columbia Association Executive and Leadership Team

July, 2026

Leadership Overview

Columbia Association has 7 executives leading key functions including strategy, finance, operations, administration, and executive support.

Driven by a commitment to community growth, Columbia Association sustains a vision of a welcoming, diverse, and respectful environment, fostering individual development through comprehensive services and extensive open spaces.

Leadership Roles at Columbia Association

  • President & Chief Executive Officer - Phillip Nelson
  • President & Chief Executive Officer - Shawn MacInnes
  • Interim President & Chief Executive Officer - Dennis Mattey
  • Executive Assistant To the President and Chief Executive Officer - Janet Loughran
  • Chief Financial Officer - Susan Krabbe
  • Senior VP, Administration & Chief Financial Officer - Shon McCollum
  • Chief Operating Officer - Rob Goldman
  • Phillip Nelson - President & Chief Executive Officer

    Phillip Nelson, the President & Chief Executive Officer at Columbia Association, directs the overarching strategy and vision for the organization. Nelson's leadership ensures the continued commitment to James Rouse's founding principles, focusing on creating a rational potential for the community. This executive guides the association's efforts to foster individual growth, welcome diversity, and respect the land. Nelson oversees the integration of recreational, cultural, and community services, ensuring they align with the core mission. The strategic direction set by Phillip Nelson impacts the maintenance of nearly 3,600 acres of open space, preserving it as a permanent asset for residents. Nelson's role involves championing the development and execution of initiatives that enhance neighborhood amenities, including parks, lakes, and extensive pathway systems, thereby maintaining Columbia's special community character.

    Shawn MacInnes - President & Chief Executive Officer

    Shawn MacInnes, the President & Chief Executive Officer at Columbia Association, drives the strategic direction and operational execution of the organization's mission. MacInnes's leadership focuses on upholding the founding vision of Columbia, emphasizing community growth and individual development. This executive oversees the comprehensive array of services, from the vibrant town center to extensive recreational facilities, ensuring they meet the community's evolving needs. MacInnes's responsibilities include fostering an environment that welcomes diversity and respects the natural landscape, aligning with the organization's commitment to sustainability. The strategic initiatives spearheaded by Shawn MacInnes support the preservation of nearly 3,600 acres of open space, a critical component of Columbia's appeal. MacInnes ensures that neighborhood amenities, such as parks, lakes, and pathways, are maintained to the highest standards, reinforcing Columbia's status as a unique and thriving community.

    Dennis Mattey - Interim President & Chief Executive Officer

    Dennis Mattey, the Interim President & Chief Executive Officer at Columbia Association, provides critical leadership during a transitional period, ensuring continuity of operations and strategic focus. Mattey's role involves guiding the organization in its commitment to fostering a diverse, respectful, and growth-oriented community. This executive oversees the management of the association's extensive services, including recreational, cultural, and community programs, ensuring alignment with the founding vision. Dennis Mattey's leadership ensures the ongoing stewardship of nearly 3,600 acres of open space, maintaining its value as a permanent community asset. Mattey's focus includes the upkeep and enhancement of neighborhood amenities, such as parks, lakes, and walking paths, reinforcing Columbia's unique character and quality of life for its residents.

    Janet Loughran - Executive Assistant To the President and Chief Executive Officer

    Janet Loughran, the Executive Assistant To the President and Chief Executive Officer at Columbia Association, provides critical administrative and logistical support to the organization's top leadership. Loughran manages complex scheduling, coordinates executive communications, and facilitates the smooth functioning of the President and CEO's office, ensuring efficient workflow. This role is integral to supporting the strategic initiatives and operational oversight directed by the President and CEO, contributing to the association's mission of fostering community growth and individual development. Janet Loughran's support is vital for the effective management of Columbia's diverse services, including recreational programs and the preservation of open spaces. Loughran ensures that executive priorities are addressed promptly, enabling leadership to focus on maintaining Columbia's unique community vision.

    Susan Krabbe - Chief Financial Officer

    Susan Krabbe, the Chief Financial Officer at Columbia Association, directs the financial strategy and fiscal health of the organization. Krabbe's responsibilities encompass managing budgets, financial planning, and ensuring the sustainable allocation of resources to support Columbia's diverse services and open spaces. This executive oversees all financial operations, including revenue generation from the town center's commercial and retail areas, and the management of expenditures for recreational and community programs. Krabbe's financial oversight is crucial for maintaining nearly 3,600 acres of open space and ensuring the upkeep of neighborhood amenities like parks and pathways. Susan Krabbe's expertise ensures that financial decisions directly support the association's vision of fostering individual growth and community well-being, safeguarding the long-term viability of Columbia as a special community.

    Shon McCollum - Senior VP, Administration & Chief Financial Officer

    Shon McCollum, the Senior VP, Administration & Chief Financial Officer at Columbia Association, directs both the administrative functions and the financial operations of the organization. McCollum's dual role ensures robust support for the association's mission, overseeing administrative processes that enhance operational efficiency and managing financial resources to sustain Columbia's comprehensive services. This executive is responsible for the fiscal integrity of the organization, including budgeting, financial reporting, and resource allocation for recreational facilities and the extensive open space management. Shon McCollum's leadership in administration supports the seamless delivery of community programs and the upkeep of neighborhood amenities. McCollum's financial acumen is critical for maintaining the long-term vision of Columbia as a thriving and well-managed community, safeguarding its assets and services for residents.

    Rob Goldman - Chief Operating Officer

    Rob Goldman, the Chief Operating Officer at Columbia Association, oversees the day-to-day operational execution of the organization's extensive service portfolio. Goldman's role involves ensuring the efficient and effective delivery of recreational, cultural, and community programs that support individual growth and community vibrancy. This executive manages the operational aspects of the town center, including its retail and entertainment venues, and directs the maintenance of nearly 3,600 acres of open space. Rob Goldman's operational leadership ensures the quality and accessibility of neighborhood amenities, such as parks, lakes, and extensive pathway systems, contributing directly to the community's high quality of life. Goldman's focus is on optimizing operational processes to uphold Columbia's founding vision and enhance resident experience.

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    Frequently Asked Questions Regarding Columbia Association Top Executives and Leadership Team

    Who leads Columbia Association?
    Columbia Association is led by Phillip Nelson (President & Chief Executive Officer), along with executives such as Shawn MacInnes (President & Chief Executive Officer) and Dennis Mattey (Interim President & Chief Executive Officer).
    Who is part of Columbia Association’s executive team?
    The executive team of Columbia Association includes leaders such as Phillip Nelson (President & Chief Executive Officer), Shawn MacInnes (President & Chief Executive Officer), Dennis Mattey (Interim President & Chief Executive Officer) and other senior executives.
    How many executives does Columbia Association have?
    Columbia Association has 7 executives leading key business areas.
    What roles are included in Columbia Association’s leadership team?
    The leadership team of Columbia Association includes roles such as President & Chief Executive Officer, President & Chief Executive Officer, Interim President & Chief Executive Officer, Executive Assistant To the President and Chief Executive Officer, Chief Financial Officer.