Trilon is founded on growth partnerships with successful firms.

Our group operates as a ‘family of companies’. Under this model, our partners and specialty firms have a high degree of autonomy and will have their own personality.

Like any harmonious family, we have a shared vision, shared values, and share our services to better support our clients. We make decisions in the best interest of the entire family and support each other to grow in both good and challenging times.

Our family comprises a mix of market leaders in Transportation, Water, Utilities, Environment and Community Infrastructure. We also have leaders in key geographic regions and nation-wide specialties.

Interested in Joining Trilon Group?

Regardless of whether you are just interested in better understanding the Trilon approach or have a desire to more formally discuss the potential to join the family we would welcome the opportunity to speak with you.

Please reach out to:


Founded in 1983, CME Associates is one of New Jersey’s leading integrated engineering firms. CME combines advanced Civil, Environmental, Geotechnical, & Structural Engineering services along with Surveying, Planning, & Landscape Architecture in one unique practice across 6 offices. From initial concept through construction, CME serves a broad range of government and private clients with world-class design & unprecedented local knowledge.


Based in Manchester, Connecticut, Fuss & O’Neill is a 100-year-old multidisciplinary engineering and environmental consulting firm that offers a comprehensive range of services to public and private clients. With a focus on sustainability and innovation, Fuss & O’Neill provides tailored solutions to address the diverse challenges faced by their clients in the fields of transportation, water resources, environmental management, and community planning. For more information, please visit

Fuss & O'Neill

Founded in 1976, Waggoner has a proud history of delivering infrastructure solutions, with a focus on the Water market. They share a common vision with Trilon in that they do more than plan and design infrastructure – they help transform communities. Their expertise spans Water, Utilities, Municipal Infrastructure and Disaster Recovery. 



Founded in 1985 in Arizona, Wilson provides infrastructure solutions that span the water, wastewater, reclaimed water, and electrical infrastructure markets. 

Wilson Engineers


Alta was founded in 1996 when cities and communities were calling for safer streets for people walking and bicycling as the non-motorized transportation movement developed in the United States. Alta pioneered the field of active transportation, evolving their planning and design work into a visionary global practice that empowers people to live active, healthy lives and gets them to where they need to go. Alta Planning + Design

Alta Planning + Design

Founded in 1977, DRMP has delivered infrastructure solutions across Florida and the Southeastern United States with multi-disciplinary civil engineering expertise that spans Transportation, Civil, Federal, and Utility markets.  DRMP has offices throughout Florida, Georgia, and North Carolina. DRMP


HMB is a premier provider of engineering services primarily focused on state and local agency clients in the transportation, water and environmental markets. Headquartered in Frankfort, Kentucky, HMB has also offices in Lexington, KY, Nashville, TN, New Albany, IN, Montgomery, AL, and Marianna, FL. HMB was founded in 1979 and has over 100 employees across its 6 offices. For more information, visit

HMB Professional Engineers

Founded in 1968, Horrocks has been an integral part of improving infrastructure for communities in the western United States. As a full-service civil engineering firm, Horrocks provides all of the disciplines necessary to study, plan, design, and communicate about infrastructure projects — from municipal water tanks to interstate highways. Horrocks is committed to providing essential resources for communities through innovative and forward-thinking engineering services. Visit Trilon | Horrocks


RDA is a Virginia-based civil engineering firm with more than 180 employees on staff, and six office locations strategically located throughout the Commonwealth of Virginia. Our mission is to capture our clients’ ideas, concepts, and plans in harmony with federal, state, and local regulations, meeting the long-range planning and environmental goals of the communities they serve. For more information, visit Rinker Design Associates

Rinker Design Associates


Fehr Graham is a premier provider of engineering, environmental and funding solutions. Professional Engineers Allen Fehr and Joseph Graham joined forces in 1973 to form Fehr Graham in Freeport, Illinois. Today, the firm employs 200 people in 12 offices in Illinois, Iowa and Wisconsin. Fehr Graham is an Engineering News-Record Top 500 Design Firm and Zweig Group Hot Firm. For more information: Fehr Graham

Fehr Graham

Founded in 2004, Gonzalez has a been recognized as a leading provider of consulting services to public and private entities throughout the Midwest. Gonzalez Companies is a partner-managed firm; with a focus on engineering and construction management solutions that provide clients with practical, buildable, and maintainable results. Gonzalez ensures clients receive comprehensive attention and solutions that are second-to-none. 

Gonzalez Companies

Founded in 1955, The Mannik & Smith Group, Inc. (MSG) has a proud 65+ year history of delivering consulting solutions to governmental agencies, municipalities, and private entities across North America. MSG is a premier multi-disciplined consulting firm, serving an exclusive collection of the some of the best and fastest growing private entities, municipalities, and governmental agencies across the Americas.

The Mannik & Smith Group

The Mannik & Smith Group

Community Infrastructure

Founded in 1981, CPH is a full-service Architecture and Engineering design firm serving Commercial, State, and Local Clients. CPH is headquartered near Orlando, Florida and currently employs professionals across 12 office locations.