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We assist clients through a combination of consulting support, technology-based solutions, professional training, and staffing services.

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Ed Warner

Radhika Silhar on June 13, 2025

Ed Warner is an environmental engineer with 23 years of experience in the field of air quality. His environmental career began with 6 years as an air emissions tester, then transitioned to a nearly 14-year regulatory role as an air permitting engineer and then lead engineer with the Montana Department of Environmental Quality.

Ed then moved to the consulting field where he has continued to work as an air quality specialist for the past 2.5 years. He has technical experience in emissions calculations, regulatory review and analysis, air permitting and compliance, technical writing, and project management.

Mike Meister

Radhika Silhar on June 13, 2025

As Principal Consultant, Mike co-leads Trinity’s consulting operations in Austin, Texas. He has assisted clients in Texas, California, Oklahoma, South Dakota, and Mississippi with regulatory research, air dispersion modeling, and permit application preparation. Mike has performed Best Available Control Technology (BACT) analyses, emissions calculations, and evaluation of New Source Performance Standards (NSPS) requirements.

Additionally, he has prepared Toxic Release Inventory (TRI) reports and has experience with SCREEN3, ISCST3, ISC-PRIME, AERMOD, and other U.S. EPA-approved air dispersion models. Using ISCST3, Mike has modeled clients’ compliance with the National Ambient Air Quality Standards (NAAQS) and Prevention of Significant Deterioration (PSD) Increments. He is an active participant in the implementation plan for AERMOD in the state of Texas. Mr. Meister has also taught Trinity’s Computer Dispersion Modeling Laboratory course and facilitated the development and delivery of custom modeling training in Colombia.

Mike earned his B.S. and M.S. degrees in Agricultural Engineering from Texas A&M University. His undergraduate and graduate employment experiences allowed him to deal directly with emerging air and water quality technologies.

Patrick Nonhof

Kathian Pellot on June 12, 2025

Patrick Nonhof holds a B.S. in Chemical Engineering from The University of Texas at Austin. He has over twenty years of experience in the petrochemical industry. He began his career with BASF and held positions in project engineering and operations.

After BASF, he worked for Berwanger, Inc., an engineering consulting company based in Houston TX. At Berwanger, Mr. Nonhof served in a variety of line management positions. During his tenure with Berwanger, he worked for multiple multi-national oil and gas companies providing Process Safety Management (PSM) services.

In 2006, he co-founded Provenance Consulting, LLC., a process safety consulting company. Provenance’s focus is implementation and maintenance of PSM systems, with a focus on data management.

Jim Lyons

Kathian Pellot on June 11, 2025

Jim Lyons is Director of Trinity Consultants’ Mobile Source and Fuels Services business line and is based in the Phoenix, Arizona office. He brings over 40 years of experience in the development, implementation, and evaluation of mobile source emissions and fuel regulatory programs at both the state and federal levels.

As leader of Trinity’s Mobile Source and Fuels team, Mr. Lyons oversees technical services related to new engine and vehicle certification, low-emission fuel strategies, and advanced control technologies. His expertise includes the Low Carbon Fuel Standard (LCFS), Renewable Fuel Standard (RFS), evaporative and refueling emissions, and greenhouse gas compliance programs. He routinely evaluates the emission impacts, costs, and cost-effectiveness of control measures across light- and heavy-duty, on-road and nonroad sources.

Mr. Lyons is nationally recognized as an authority on mobile source regulations and serves as a testifying and consulting expert in litigation involving product liability, intellectual property, and regulatory compliance. He has supported high-profile enforcement cases in the auto manufacturing and refining sectors, including international expert testimony in China.

He has authored or contributed to more than 100 technical reports and peer-reviewed publications on emissions modeling, fuel impacts, vehicle standards, and air quality strategy.

He holds an M.S. in Chemical Engineering from the University of California, Los Angeles, and a B.S. in Chemistry (Cum Laude) from the University of California, Irvine. He is a member of the Society of Automotive Engineers.