Trileaf is a specialized environmental, architecture, and engineering firm.

We are known for completing large volumes of small and medium-sized projects across large geographies, including Phase I Environmental Site Assessments, As-Built Site Surveys, Construction Documents, and FCC NEPA Reviews. We employ highly-trained personnel in a variety of disciplines spanning the map, ensuring our ability to produce consistent, fast results for your project without relying on contractors or subconsultants.


Years in business




Portfolio Managers




US States


Completing projects in all 50 states and Canada from 19 locations coast-to-coast

With multiple locations across the country, Trileaf has developed expertise in our industry through our work on over 90,000 sites, spanning every state, territory, and province in the United States and Canada.

Consistent, Responsive, and Cost-Effective

We are consistent, responsive, and cost-effective – these are the hallmarks of the Trileaf Experience.


We Are Consistent

Consistency is a primary aspect of our service. Through our specialized Client Groups, an industry-specific project manager acts as your Single Point of Contact (POC) for Trileaf services, providing expertise and responsiveness while developing insights into your needs as our client.


We Are Responsive

We are proud of our reputation as a responsive firm. Your project is important, and we are committed to providing you with real-time updates. When you reach out by phone or email, our project managers will respond within the hour, and for those occasions in which your project manager is unavailable, we will provide a back-up contact to ensure you are always able to reach someone at Trileaf.


We Are Cost-Effective

When we take on your project, we don’t trust the results to just anyone. Trileaf performs all site visits across the U.S. and Canada utilizing our skilled, full-time staff – not subcontractors – without charging extra for travel. While many other firms will hire subcontractors or send talent to your site on your dollar, we believe Trileaf personnel offer the most value to your venture and include travel expenses in our lump-sum pricing. We want to make it as easy as possible to work with us, so we never charge mileage and decide pricing according to your needs.

Our History

After graduating with an MBA from the Kellogg Graduate School of Management at Northwestern University, T. Scott Muschany teamed with geologist Todd Prevette to form Trileaf Corporation in May of 1993. Headquartered in St. Louis, Missouri, the two founders and sole employees initially focused  in Iowa and Missouri, performing UST site investigations, Phase I ESAs, and Air Permitting projects. Excellent service attracted additional clients, which translated into employee growth. In 1999, Trileaf was named as ‘one of the fastest-growing privately held companies in America’ by Inc Magazine in their annual Inc. 500 publication.

In 1998, Trileaf performed our first NEPA for the telecommunications industry – perhaps the first of its kind.  Trileaf continued to grow and expand its reach nationwide. In 2009, in response to requests from our clients to expand our service offerings, Trileaf started the Architecture and Engineering Division, and a few years later, the Cultural Resources Division.

Trileaf currently maintains offices and full-time employees coast-to-coast, allowing us to perform excellent work, quickly, anywhere. As of 2022, Trileaf has completed work in all 50 states, Canada, Guam, and Puerto Rico, and is licensed to perform Architecture and Engineering services in 47 States.

Our mission

Honor God, Develop People, Grow Profitably

Honor God

At Trileaf, we honor God by treating each other with respect, keeping our promises, communicating honestly, and acting in good faith. This guides our interactions with personnel, clients, and vendors alike, we look for ways to serve on another and facilitate goal achievement. We will do what we say we will do, in the timing we’ve agreed upon, and in a more excellent manner than is expected.

Develop People

Focusing on personal and professional development is not only the right thing to do for our personnel, but also the best thing for you as our client. As individuals grow at Trileaf, they are provided with continual training, advanced responsibility, and valuable input. As industry leaders, it is imperative that our personnel continue their professional education and pursue certifications to perpetually expand their expertise. From entry level to management positions, Trileaf’s goal is for employees to consistently develop their professional capability and their personal maturity. To maintain our high service standards, we hire professionals who possess skills, experience, and a desire to pursue growth in their expertise.

Grow Profitably

We believe growing profitably is a natural consequence of achieving our first two objectives. Over the past 25 years, Trileaf has grown from a small regional environmental consulting service provider to a full-service, specialized environmental, architecture, and engineering firm with offices throughout the nation. As we continue to expand, so does our ability to benefit both our clients and our personnel. We are committed to developing an even greater breadth of services for your projects.

Trileaf is a trusted partner to hundreds of clients each year

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