Trileaf Corporation

Trileaf Corporation is an environmental, architecture, and engineering firm based in St. Louis, Missouri. Founded in 1993, the company initially focused on underground storage tank site investigations and environmental assessments. Over the years, Trileaf has expanded its services and geographic reach, completing over 90,000 projects across all 50 U.S. states, Canada, Guam, and Puerto Rico.Trileaf operates through three main divisions: Environmental Services, which includes site assessments and compliance work; Architecture and Engineering, providing design solutions; and Cultural Resources, focusing on historical preservation. The firm serves key sectors such as telecommunications and commercial developments, emphasizing rapid turnaround and client-centric workflows. With a strong commitment to collaboration and professional development, Trileaf is currently in a phase of expansion, aiming to enhance its service offerings and geographic capabilities.