HNTB Corporation is a prominent American infrastructure solutions firm, known for its expertise in architecture, engineering, and planning services. With a history spanning over a century, HNTB has been involved in numerous landmark projects across the United States, contributing significantly to the development of transportation systems, bridges, and public facilities.

HNTB is committed to sustainability and integrates environmentally responsible practices into its projects. The company focuses on reducing the environmental impact of its designs and operations, striving to create sustainable infrastructure that benefits communities and the environment. HNTB's approach includes the use of innovative technologies and materials to enhance energy efficiency and minimize carbon footprints.

While specific details on HNTB's sustainability certifications or ESG reports are limited, the company emphasizes its dedication to sustainable development through its project work and corporate practices. HNTB actively seeks to incorporate green building standards and sustainable design principles in its projects, aligning with broader industry trends towards environmental stewardship.