G&A Partners Executive and Leadership Team

June, 2026

Leadership Overview

G&A Partners has 5 executives leading key functions including strategy, operations, revenue, people, and legal.

Driven by a commitment to client success, G&A Partners provides comprehensive human resource services, HR management, payroll processing, and benefits administration, solidifying its market position through expert leadership.

Leadership Roles at G&A Partners

  • Chief Executive Officer - Hyun Namgoong
  • Chief Operating Officer - Aaron Call
  • Chief Revenue Officer - Jonathan Allen
  • Chief People Officer - Michelle Mikesell
  • Chief Legal Officer & General Counsel & Corporate Secretary - Stephen Calvert
  • Hyun Namgoong - Chief Executive Officer

    Hyun Namgoong, the Chief Executive Officer at G&A Partners, directs the overarching strategy and vision for the company's comprehensive human resource services. This leadership role involves guiding the organization's expansion in HR management, payroll processing, and benefits administration. By setting strategic objectives, Hyun Namgoong ensures G&A Partners maintains its commitment to client success and operational excellence across all service offerings. The Chief Executive Officer's focus remains on driving sustainable growth and reinforcing the company's position as a leading outsourcing provider. This executive's guidance shapes the company's market approach and operational framework, ensuring alignment with client needs and industry best practices. Hyun Namgoong's strategic direction is paramount to the firm's continued impact in the HR services sector.

    Aaron Call - Chief Operating Officer

    Aaron Call, the Chief Operating Officer at G&A Partners, oversees the execution of daily operations and the delivery of comprehensive human resource services. This critical function ensures the seamless integration of HR management, payroll processing, and benefits administration for clients. Aaron Call's responsibilities include optimizing internal processes and enhancing service delivery efficiency across the organization. The Chief Operating Officer's leadership ensures that G&A Partners consistently meets and exceeds client expectations through robust operational frameworks. By managing resource allocation and operational workflows, Aaron Call directly supports the company's mission to provide exceptional outsourcing solutions. This executive's role is central to maintaining the high standards of service that define G&A Partners' market reputation.
    Aaron Call

    Jonathan Allen - Chief Revenue Officer

    Jonathan Allen, the Chief Revenue Officer at G&A Partners, drives the company's revenue generation strategies and market expansion initiatives. This executive leads all sales and business development efforts, focusing on growing the client base for HR management, payroll processing, and benefits administration services. Jonathan Allen's strategic oversight ensures that G&A Partners effectively captures market opportunities and strengthens client relationships. The Chief Revenue Officer's performance is measured by the sustained growth in revenue and market share. By cultivating new business and expanding existing accounts, Jonathan Allen plays a pivotal part in the company's financial success and overall market impact. This leadership ensures the continued delivery of value-driven HR solutions.
    Jonathan Allen

    Michelle Mikesell - Chief People Officer

    Michelle Mikesell, the Chief People Officer at G&A Partners, directs the company's internal human capital strategy and employee experience initiatives. This role is fundamental to fostering a high-performance culture that supports the delivery of comprehensive HR services, including HR management, payroll processing, and benefits administration. Michelle Mikesell oversees talent acquisition, employee development, and organizational design, ensuring G&A Partners attracts and retains top talent. The Chief People Officer's focus on employee well-being and professional growth directly contributes to the company's operational strength and client service quality. By championing people-centric policies, Michelle Mikesell reinforces G&A Partners' commitment to its workforce, which is essential for sustained success in the competitive outsourcing landscape.
    Stephen Calvert, the Chief Legal Officer & General Counsel & Corporate Secretary at G&A Partners, provides critical legal counsel and oversees corporate governance for the organization. This executive ensures compliance with all relevant laws and regulations impacting HR management, payroll processing, and benefits administration services. Stephen Calvert's responsibilities include managing legal risks, advising on corporate strategy, and maintaining the integrity of corporate records. The Chief Legal Officer & General Counsel & Corporate Secretary's expertise is vital for navigating the complex legal landscape inherent in the outsourcing industry. By safeguarding the company's legal interests, Stephen Calvert supports G&A Partners' commitment to ethical operations and client trust, ensuring robust governance across all business functions.
    Stephen Calvert

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    Frequently Asked Questions Regarding G&A Partners Top Executives and Leadership Team

    Who leads G&A Partners?
    G&A Partners is led by Hyun Namgoong (Chief Executive Officer), along with executives such as Aaron Call (Chief Operating Officer) and Jonathan Allen (Chief Revenue Officer).
    Who is part of G&A Partners’s executive team?
    The executive team of G&A Partners includes leaders such as Hyun Namgoong (Chief Executive Officer), Aaron Call (Chief Operating Officer), Jonathan Allen (Chief Revenue Officer) and other senior executives.
    How many executives does G&A Partners have?
    G&A Partners has 5 executives leading key business areas.
    What roles are included in G&A Partners’s leadership team?
    The leadership team of G&A Partners includes roles such as Chief Executive Officer, Chief Operating Officer, Chief Revenue Officer, Chief People Officer, Chief Legal Officer & General Counsel & Corporate Secretary.