Triterra Named to 2021 Inc. 5000 List of America’s Fastest-Growing Private Companies

LANSING, MI – September 2021: Triterra, a Michigan-based environmental consulting firm, has been recognized on the annual Inc. 5000 list, the most prestigious ranking of the fastest-growing private companies in the United States. The Inc. 5000 represents a unique look at the most successful companies within the American economy’s most dynamic segment – independent small businesses. Triterra joins other well-known companies including Intuit, Zappos, Under Armour, Microsoft, Patagonia, and others, who gained their first national exposure as honorees on the Inc. 5000.

“We are excited to be recognized by Inc. as one of the fastest-growing companies in the US,” said Don McNabb, CEO, Visionary, and co-founder of Triterra. “As the environmental consulting industry expands, we grow with it. We are investing in our people, technology, and expansion initiatives to ensure that our clients are able to achieve their goals.”

The 2021 Inc. 5000 is ranked according to percentage revenue growth when comparing 2017 and 2020. During this period, Triterra’s revenue increased by 61%.  “The 2021 Inc. 5000 list feels like one of the most important rosters of companies ever compiled,” says Scott Omelianuk, editor-in-chief of Inc. “Building one of the fastest-growing companies in America in any year is a remarkable achievement. Building one in the crisis we’ve lived through is just plain amazing. This kind of accomplishment comes with hard work, smart pivots, great leadership, and the help of a whole lot of people.”

Complete results of the Inc. 5000, including company profiles and an interactive database that can be sorted by industry, region, and other criteria, can be found at The top 500 companies are featured in the September issue of Inc.


Oslosky Joins Triterra

Triterra is pleased to welcome Greg Oslosky, Associate Geologist, to our team of professionals. Oslosky’s role will include managing projects, helping grow Triterra in West Michigan, and providing technical assistance. Greg acquired a Bachelor of Science in Geology, from the University of South Florida in Tampa. Oslosky has over seventeen years of experience as an Environmental Consultant including soil and groundwater investigations under several state and federal programs, project management, due diligence environmental site assessments, LNAPL characterization assessments, hydrogeological assessments, and facility decommissioning. Greg is originally from Pittsburgh, Pennsylvania, and moved to West Michigan with his family in 2019 to be closer to his wife’s family.




Feher Joins Triterra

Carrie Feher joins Triterra as an Accounting Specialist. Carrie holds a master’s degree in Business Administration with a concentration in Human Resources from Davenport University. Her work focuses on invoice processing and managing financial transactions, as well as maintaining vendor invoices and internal entries within the accounting system. Feher also assists with accounts receivable and preparing reports.




Kortas and Twohig Join Triterra

Madison Kortas joins Triterra as a Geologist. Madison holds a bachelor’s degree in Geological Sciences at Michigan State University (East Lansing, Michigan). Her work focuses on Hazardous Materials Services. Ms. Kortas conducts field inspections/sampling to determine the presence of asbestos, mold, and lead. Ms. Kortas’s responsibilities include field activities completing subsurface investigations, including borehole logging and soil/groundwater sampling. Data evaluation and technical report writing for investigation/remediation projects is a substantial part of her role at Triterra.  Her other responsibilities include conducting Phase I ESAs associated with property transactions.



Taylor Twohig joins Triterra as an Environmental Scientist. Taylor holds a Bachelor of Biology & Environmental Science degree from the University of Michigan (Flint, Michigan). Her work focuses on Environmental Due Diligence Services. Taylor also supports the Natural Resources Group. Taylor conducts Phase I Environmental Site Assessments (ESAs), field assignments, data analysis, and technical report preparation. She understands regulatory requirements and considerations necessary for environmental due diligence projects.