Kimley-Horn Executive and Leadership Team

Tammy Flanagan, the Chief Financial Officer at Kimley-Horn, directs the firm's financial strategy, capital allocation, and fiscal planning. Overseeing the financial health of the organization, the Chief Financial Officer ensures that investments in transportation, transit, and environmental services yield strong returns. This leadership role involves managing complex budgeting processes and providing the Board with critical insights into market performance. By optimizing the firm's financial structure, Tammy Flanagan directly impacts the long-term stability and growth potential of the business. The Chief Financial Officer works in tandem with other executives to support strategic expansion and resource management across all service lines. Through the maintenance of transparent financial reporting and disciplined fiscal oversight, Flanagan secures the resources necessary for the firm to continue delivering high-quality design and planning consulting services to clients throughout the national market.

Aaron Nathan, the Chief Operating Officer at Kimley-Horn, executes the firm's daily operational strategies to ensure excellence in transportation and transit consulting. Overseeing the coordination of multi-disciplinary teams, the Chief Operating Officer drives internal efficiency and project delivery standards across all regional markets. This leadership role involves managing resource allocation to support the firm's diverse service offerings, from landscape architecture to energy infrastructure. By refining operational processes, Aaron Nathan directly impacts the firm's ability to meet complex client demands. The Chief Operating Officer collaborates with executive leadership to scale business operations while maintaining the high quality associated with the brand. Through the implementation of rigorous performance metrics, Nathan ensures that all departments remain aligned with corporate objectives, ultimately fostering sustainable growth and operational excellence throughout the firm's extensive network of offices and project sites.

Jonathan Oliver, the President-Elect at Kimley-Horn, prepares for the transition of executive leadership while overseeing key strategic initiatives in the transportation and roadway sectors. Overseeing the alignment of long-term vision with current project execution, the President-Elect ensures that the firm remains at the forefront of infrastructure design. This leadership role involves engaging with stakeholders to identify new market opportunities and strengthen existing client relationships. By facilitating strategic planning sessions, Jonathan Oliver directly impacts the firm's future trajectory and market positioning. The President-Elect works closely with the current executive team to ensure continuity and stability during the upcoming leadership transition. Through the promotion of collaborative design practices, Oliver helps maintain the firm's reputation for quality and innovation, ensuring that the organization remains well-positioned to address the evolving needs of the national infrastructure landscape.

Gary Garlow, the President at Kimley-Horn, directs the firm's overarching business strategy and market expansion efforts. Overseeing the delivery of full-service consulting across all disciplines, the President ensures that the firm maintains its status as a premier provider of planning and design solutions. This leadership role involves setting the strategic direction for the firm's diverse service portfolio, including aviation, energy, and integrated water projects. By driving high-level business development, Gary Garlow directly impacts the firm's growth and competitive standing. The President collaborates with the Board and other C-suite leaders to ensure that all operations align with the firm's core mission of excellence. Through the cultivation of strong client partnerships and the promotion of a culture of quality, Garlow secures the firm's long-term success and influence within the national consulting industry.

Joseph Riccardi, the President, Branch (Mckinney) at Kimley-Horn, manages regional operations and project delivery for the firm's local market presence. Overseeing the execution of land development and transportation projects, the President, Branch (Mckinney) ensures that local client needs are met with the firm's signature quality and expertise. This leadership role involves coordinating with regional teams to optimize project workflows and maintain high standards of design. By fostering local business relationships, Joseph Riccardi directly impacts the firm's regional market share and reputation. The President, Branch (Mckinney) works with corporate leadership to ensure that local initiatives align with the firm's national strategic goals. Through the effective management of regional resources and the promotion of collaborative design, Riccardi drives project success and contributes to the firm's overall mission of providing premier consulting services.

Catherine Hyland, the President at Kimley-Horn, leads the firm's strategic initiatives focused on sustainable infrastructure and environmental consulting. Overseeing the integration of environmental considerations into large-scale planning projects, the President ensures that the firm delivers innovative and responsible design solutions. This leadership role involves guiding cross-functional teams to address complex challenges in energy and water management. By championing sustainable design practices, Catherine Hyland directly impacts the firm's ability to lead in the evolving green infrastructure market. The President collaborates with other executive leaders to refine the firm's service offerings and expand its reach into new sectors. Through the promotion of forward-thinking design methodologies, Hyland strengthens the firm's commitment to quality and environmental stewardship, ensuring that the organization continues to provide high-value consulting services to clients across the country.

J. Otto, the Chief Technology Officer at Kimley-Horn, directs the integration of advanced digital tools into complex planning and design workflows. Overseeing the firm's technological roadmap, the Chief Technology Officer ensures that engineering teams utilize cutting-edge software to optimize roadway, bridge, and aviation projects. This leadership role involves evaluating emerging tech trends to maintain a competitive edge in the national consulting market. By architecting scalable digital infrastructure, J. Otto directly impacts the efficiency of multi-disciplinary design teams. The Chief Technology Officer collaborates with other C-suite leaders to align technical investments with long-term business growth. Through the implementation of robust data management systems, Otto secures the firm's position as a leader in integrated technology solutions, ultimately driving innovation across all North American operations and enhancing project delivery speed for diverse public and private sector clients.

Jeff Witt, the Chief Information Officer at Kimley-Horn, manages the firm's enterprise-wide information systems and cybersecurity posture. Overseeing the protection of sensitive project data, the Chief Information Officer ensures that all digital assets remain secure while supporting the firm's vast array of disciplines, including land development and water management. This leadership role involves streamlining internal communication networks to facilitate seamless collaboration across regional offices. By optimizing information flow, Jeff Witt directly impacts the operational agility of the entire organization. The Chief Information Officer works closely with the Board to mitigate digital risks and support the firm's commitment to high-quality consulting services. Through the deployment of resilient network architectures, Witt maintains the integrity of the firm's digital environment, ensuring that all staff members possess the necessary tools to execute complex design projects with precision and reliability across the United States.

Lori Vannewkirk, the Senior Vice President, Director of Human Resources (Chief Human Resources Officer) at Kimley-Horn, architects the firm's talent acquisition and professional development strategies. Overseeing the recruitment of top-tier engineers and planners, the Chief Human Resources Officer ensures that the firm maintains a workforce capable of delivering excellence in land development and asset management. This leadership role involves fostering a culture of innovation and professional growth across all regional offices. By implementing comprehensive training programs, Lori Vannewkirk directly impacts the firm's ability to retain high-performing talent. The Chief Human Resources Officer collaborates with the executive team to align human capital strategies with the firm's broader business goals. Through the development of inclusive and effective workplace policies, Vannewkirk supports the firm's mission to provide premier consulting services by empowering the people who drive the firm's success.