HR Green is pleased to announce that Tammy Hefner has joined the firm’s St. Louis office as an Area Manager for Construction.
Tammy brings more than two decades of progressive experience in transportation operations, maintenance management, and construction oversight within a statewide transportation system. She has led multidisciplinary teams across maintenance, traffic, general services, engineering, and IT, while managing district‑wide budgets, resource allocation, and long‑range operational planning. Her background includes administering complex construction contracts, supervising field offices, coordinating emergency response operations, and ensuring compliance with plans, specifications, and safety requirements.
In this role, Tammy will lead the delivery of HR Green’s construction engineering and inspection services across a multi‑county region in Southeast Missouri. She will oversee high‑profile infrastructure projects from preconstruction through completion, guiding teams in contract administration, construction management, and field inspection so that each project meets client expectations. By driving constructability reviews, safety planning, and continuous quality assurance, Tammy will help clients achieve efficient, cost‑effective, and thoroughly documented project outcomes that exemplify HR Green’s commitment to exceptional service.
“I’m truly excited to join the talented HR Green team and be part of a company that lives its mission of ‘Building Communities. Improving Lives.’ Working in the southeast region of Missouri means a great deal to me—I care deeply about the people and places that make this area home. My passion has always been inspecting projects to ensure they are efficient, thoughtful, and safe, ultimately contributing real value to our local communities. I’m looking forward to the challenges ahead and am grateful for the opportunity to bring my past experiences into a role where the work we do makes a meaningful difference.
Tammy earned a B.S. in Civil Engineering Technology from Murray State University and a B.S. in Engineering from Arkansas State University. She is a Licensed Professional Engineer (PE). She is a member of the Missouri Society of Professional Engineers (MSPE) and the National Society of Professional Engineers (NSPE).
