Leadership Team

Greg Slater has over two decades of public service, most recently serving as Secretary of the Maryland Department of Transportation (MDOT). At MDOT State Highway Administration, he worked his way through the ranks, starting his career in Plats and Survey operations, advancing to leadership positions in the Engineering and Planning/Programming offices. Greg's commitment to customers, community involvement, collaboration, and innovation will help THEA prepare for the future.

Amy Lettelleir joined THEA in 2017 as CFO, bringing to the team more than 20 years of experience as a Public Finance Professional. Today she serves as THEA’s Chief Legal Officer where she uses her business acumen, negotiating skills, and deep knowledge of law and regulations to provide expert and strategic legal advice to THEA’s Executive Director and Board of Directors.

Amy started her career as a real estate attorney and served as a public finance attorney for more than 10 years working with governments and local government agencies. She has been a member of the Florida Bar for 25 years.

Tim Garrett is THEA’s first COO, joining the THEA Team in November 2024. He brings more than 30 years of design, planning, operations and systems management experience with a focus on transportation technology, tolling and program management. Tim is a registered Professional Engineer (PE) in the state of Florida and has a Project Management Professional (PMP) certification from the Project Management Institute (PMI). He is a graduate of the International Bridge, Tunnel and Turnpike Association (IBTTA) Leadership Academy and the Florida Engineering Society’s Florida Engineering Leadership Institute (FELI).

As COO, Tim reports to the Executive Director and is responsible for overseeing the day-to-day operations of THEA including executing THEA’s strategic plans, optimizing operational efficiency, mentoring senior operational staff and fostering a collaborative and high-performance culture.

Tim obtained his Bachelor of Science Degree in Engineering from the University of Maryland in 1992.

As Director of Planning and Innovation for the Authority, Bob is responsible for new projects including the Connected Vehicle Award, THEA’s USDOT Automated Vehicle Test Bed Certification.