Clark Hill Executive and Leadership Team

October, 2026

Leadership Overview

Clark Hill has 6 executives leading key functions including strategy, human capital, legal compliance, professional advocacy, talent management, and operational oversight.

Focused on delivering multidisciplinary legal solutions, Clark Hill maintains a commitment to excellence by integrating deep industry expertise with a client-centered approach to complex international law.

Leadership Roles at Clark Hill

  • Chief Executive Officer - John Hensien
  • President of the American Bar Association - Reginald Turner
  • President - Jeffrey Harris
  • Chief Human Resources Officer - Kathleen Sullivan
  • Chief Legal Officer - Jadd Masso
  • Chief Human Resource Officer - Kelli Matthew
  • John Hensien - Chief Executive Officer

    John Hensien, the Chief Executive Officer at Clark Hill, directs the firm's overarching strategic vision and international growth initiatives. Overseeing the integration of multidisciplinary practices, the Chief Executive Officer ensures alignment between legal service delivery and evolving client needs across global markets. This leadership role involves managing high-level partnerships and driving operational efficiency to maintain the firm's competitive position. By fostering a culture of innovation, John Hensien directly impacts the firm's ability to navigate complex regulatory landscapes. Hensien coordinates with the board to execute long-term financial objectives while upholding the professional standards established since 1890. Through rigorous oversight of firm-wide performance, the Chief Executive Officer secures the stability and reputation of the organization in the international legal sector, ensuring that all regional operations contribute effectively to the broader mission of providing comprehensive legal counsel.
    John Hensien

    Reginald Turner - President of the American Bar Association

    Reginald Turner, the President of the American Bar Association at Clark Hill, drives the firm's engagement with national legal policy and professional advocacy. Overseeing the firm's participation in shaping industry standards, the President of the American Bar Association ensures that the firm remains at the forefront of legal discourse and reform. This leadership role involves representing the firm's interests within the broader legal community and promoting the advancement of justice. By championing initiatives that improve the legal profession, Reginald Turner directly impacts the firm's standing as a thought leader in the industry. Turner coordinates with external stakeholders to influence policy decisions that affect the firm's multidisciplinary practices. Through active involvement in professional associations, the President of the American Bar Association enhances the firm's visibility and influence, ensuring that the organization contributes meaningfully to the evolution of legal practice and public service.

    Jeffrey Harris - President

    Jeffrey Harris, the President at Clark Hill, manages the firm's day-to-day business operations and execution of tactical objectives. Overseeing the performance of various practice groups, the President ensures that the firm meets its revenue targets and operational milestones. This leadership role involves coordinating between different departments to ensure that the firm's multidisciplinary services are delivered efficiently. By monitoring key performance indicators, Jeffrey Harris directly impacts the firm's financial health and market competitiveness. Harris collaborates with the CEO to translate strategic goals into actionable plans for the firm's regional offices. Through the rigorous management of internal resources, the President maintains the firm's operational momentum, ensuring that all business units remain aligned with the firm's core mission of providing high-quality legal counsel to a diverse and international client base.

    Kathleen Sullivan - Chief Human Resources Officer

    Kathleen Sullivan, the Chief Human Resources Officer at Clark Hill, manages the firm's talent acquisition and professional development frameworks. Overseeing the recruitment of top-tier legal professionals, the Chief Human Resources Officer ensures that the firm maintains a high-performance culture across all international offices. This leadership role involves designing comprehensive benefits programs and fostering an inclusive workplace environment that supports the firm's multidisciplinary goals. By implementing advanced performance management systems, Kathleen Sullivan directly impacts the retention of elite legal talent. Sullivan collaborates with department heads to align human capital strategies with the firm's broader business objectives. Through the optimization of internal training initiatives, the Chief Human Resources Officer strengthens the firm's collective expertise, ensuring that the workforce remains equipped to handle the sophisticated legal challenges presented by the firm's diverse client base.
    Kathleen Sullivan
    Jadd Masso, the Chief Legal Officer at Clark Hill, governs the firm's internal compliance protocols and risk management strategies. Overseeing the legal integrity of firm operations, the Chief Legal Officer ensures that all practice groups adhere to the highest ethical standards and regulatory requirements. This leadership role involves advising the executive team on complex legal matters and mitigating potential liabilities across the firm's international footprint. By architecting robust governance frameworks, Jadd Masso directly impacts the firm's operational security and professional reputation. Masso works closely with the board to address emerging legal trends that affect the firm's multidisciplinary practice areas. Through the continuous monitoring of internal policies, the Chief Legal Officer protects the firm's interests, ensuring that all legal activities remain consistent with the firm's long-standing commitment to excellence and professional responsibility in the global marketplace.
    Jadd Masso

    Kelli Matthew - Chief Human Resource Officer

    Kelli Matthew, the Chief Human Resource Officer at Clark Hill, focuses on the operational scaling of the firm's administrative and support staff. Overseeing the efficiency of internal support systems, the Chief Human Resource Officer ensures that the firm's infrastructure effectively supports the needs of the legal teams. This leadership role involves streamlining internal processes and enhancing the employee experience to drive operational productivity. By implementing technology-driven solutions for staff management, Kelli Matthew directly impacts the firm's ability to deliver seamless service to clients. Matthew works with the executive team to align administrative resources with the firm's growth targets. Through the optimization of internal workflows, the Chief Human Resource Officer improves the firm's overall agility, ensuring that the support structure remains robust enough to handle the demands of a complex, international legal practice while maintaining high standards of operational excellence.

    Frequently Asked Questions Regarding Clark Hill Top Executives and Leadership Team

    Who leads Clark Hill?
    Clark Hill is led by John Hensien (Chief Executive Officer), along with executives such as Reginald Turner (President of the American Bar Association) and Jeffrey Harris (President).
    Who is part of Clark Hill’s executive team?
    The executive team of Clark Hill includes leaders such as John Hensien (Chief Executive Officer), Reginald Turner (President of the American Bar Association), Jeffrey Harris (President) and other senior executives.
    How many executives does Clark Hill have?
    Clark Hill has 6 executives leading key business areas.
    What roles are included in Clark Hill’s leadership team?
    The leadership team of Clark Hill includes roles such as Chief Executive Officer, President of the American Bar Association, President, Chief Human Resources Officer, Chief Legal Officer.