This is us

Please allow us to introduce ourselves.

We are about helping you make your wastewater treatment program a worry-free source of pride for your communities.

The wastewater industry has seen how nutrients have exposed the limits of existing solutions. Nexom (now including EDI) designs and supplies the next wave of proven technologies for cleaner water so municipalities and industries can confidently meet and exceed every treatment need.

When wastewater plants get tighter regulations (or when their aging infrastructure can no longer meet existing regulations), their engineers turn to us to help them produce low carbon, phosphorus or nitrogen concentrations. We offer proprietary technologies including:

These, along with the rest of our proven portfolio, make us a leader in clean water technologies.

Our understanding of the following three traits sets us apart:

Responsive service and technologies: Our team strives to make our customers’ lives easier by providing responsive service, with design support and drawings to keep projects on track. Our portfolio of proprietary technologies is responsive as well, focused on addressing the contaminants and nutrients that regulators are targeting today and into the future.

At home in the cold: We understand cold water presents unique dynamics that are often believed to be insurmountable. At our office in Winnipeg, Manitoba, Canada, we annually see the coldest winters of any North American city of over 500,000 residents, and it’s in those conditions that our technologies have been proven.

Research and performance: We only promise what we have proven Nexom technologies and services can reliably deliver. We can provide years of data from dozens of full-scale installations, have been approved by the most rigorous regulators on the continent, and have the testimony of recognized academic authorities. All this, to give you the confidence that if its supplied by Nexom, it will work.

Our vision is for every drop of wastewater in North America to meet the highest nutrient standards at the lowest possible energy footprint.

As Nexom, we ensure all wastewater plant operators sleep easy at night through a relentless commitment to proven innovation, best in class employees and customer service.

We are proud of the history that we get the chance to write every day.


Our story dates back as far as 1975...

…when Environmental Dynamics International (EDI) is founded by Charles E. Tharp, a Columbia, Missouri-based company that quickly becomes a global competitor in biological wastewater treatment and advanced diffused aeration systems for municipal and industrial clients.

In 1997, Nelson Environmental is founded.

Winnipeg, MB-based Nelson Environmental was founded by Martin Hildebrand, P.Eng, to focus on the underserved lagoon market and equipping these low O&M facilities favoured by small- to mid-sized communities and industrial clients with the tools needed to meet tomorrow’s effluent requirements.

In 2016, Nelson Environmental becomes Nexom.

With the acquisition of Nelson Environmental by XPV Water Partners, the acquisition of the assets of Blue Water Technologies, the resulting launch of a full-line of nutrient- and solids-focused filtration technologies, the company emerged with a new name: Nexom.

In 2019, KKR and XPV choose Nexom as a foundational piece for a new platform.

Two of the biggest private equity firms active in the wastewater industry, KKR (through its Global Impact fund) and XPV Water Partners joined forces to use Nexom (alongside Environmental Operating Solutions, Inc., or EOSi) to form a new water quality platform. Axius Water, as it is now known, was created to address United Nations Sustainable Development Goal #6 by addressing the global wastewater nutrient crisis.

In 2020, EDI joins the Nexom family.

With the acquisition of EDI by Axius Water and its integration into Nexom, EDI continues to offer “aeration for life” through its engineered aeration technologies, and the combination of the two companies instantly creates a globally-competitive nutrient management leader offering an ever-broadening range of category-leading technologies.

In fact, it is thanks to this team that we, Nexom has been named the Best Employer in Wastewater by Hunter Crown, the water-focused recruiting and executive search company, twice!

Our Leadership Team
Meet the team that sets the tone.
Martin Hildebrand, P.Eng.

Martin Hildebrand, P.Eng.


Martin Hildebrand, P.Eng, started Nexom’s founding predecessor, Nelson Environmental, in 1997, and in the subsequent years has focused on guiding the company to pioneer numerous leading biological and filtration-based wastewater treatment systems. That experience includes research and wastewater technology development as well as process design and optimization of over 700 projects across North America and the Middle East.

Fred McCabe

Fred McCabe

Sr. Vice President & EDI General Manager

Our Sr. Vice President and EDI General Manager in Columbia, MO, Fred McCabe is a graduate of the University of Missouri-Columbia where he received a BS in Marketing and an MBA in Finance. Prior to joining EDI in 2003, Mr. McCabe was with the consulting firm of ILMS, LLC and Director of Materials for the Power System Division of Hubbell. Mr. McCabe’s responsibilities include management of the Columbia, MO, operations including finance, MIS, contracts, sales, inside sales, project management, safety and production operations.

Mona Colburn

Mona Colburn

Vice President, Finance

Mona Colburn joined Nexom’s finance and accounting team in 2008, and by 2013 she was leading it. She has has been a key contributor to a variety of acquisitions while overseeing successful reporting, audit, forecasting and cash management amidst the 4x+ organic growth of Nexom’s core business. Ms. Colburn holds her Bachelor of Commerce degree with a Major in Accounting, and leads both the Nexom and EDI teams with a current focus on understanding challenges and providing process-driven solutions that drive profitable growth.

Marty Lehman

Marty Lehman

Vice President, Operations

As VP of Operations, Marty Lehman is responsible for the entire Nexom experience once a purchase order has been signed. Coming to Nexom having led teams at Boeing and Dow Chemical, Marty is tasked with leading continual process improvement efforts and optimizing the flow of projects through engineering, installation, and customer service, and every stage in between. Hailing from Hamilton, Ontario, Marty received his Bachelor of Chemical Engineering and Management from McMaster University.

Carlos Rios

Carlos Rios

Global Vice President, Sales & Marketing

Carlos Rios Cavazos leads the Nexom & EDI Sales & Marketing teams in providing support to consultants, municipalities and industries that are looking for proven and cost-effective biological wastewater treatment or aeration solutions. Carlos is a Chemical Engineering graduate from the Universidad Nacional Autónoma de México (UNAM) of México City, with 18 years of experience in the water and wastewater treatment industry. He has worked on the development of municipal and industrial projects (DBOT) for potable water and wastewater treatment plants and he previously managed the Global Sales Team of EDI focused on driving strategies to achieve corporate growth.

Glen Wylie

Glen Wylie

Vice President, Infrastructure Services

Glen Wylie joined EDI in 2007 and directs its aftermarket sales through the company’s SiteWorks™ installation and maintenance division, as well as Customer Services operations for equipment inspection and commissioning. Mr. Wylie is a licensed General Contractor in 17 states across the U.S. Prior to joining EDI, Mr. Wylie held various financial and operational executive positions in a Fortune 500 company as well as startup ventures in high-tech and alternative energy industries. Mr. Wylie holds a BS degree from Brigham Young University in Provo, Utah.

Our Platform

Nexom (including EDI) is part of the Axius Water family of companies, a water quality-focused platform led by CEO Chris McIntire and formed by KKR’s Global Impact Fund and XPV Water Partners.

For more information, visit


ESG (Environmental, Social, and Governance)

In addition to Axius Water’s position at the forefront of addressing UN Sustainable Development Goal 6 (specifically Target 6.3), the platform’s stakeholders are counting on it to demonstrate excellence and transparency across all ESG issues. To learn more about Axius Water’s efforts through fiscal year 2020, and its commitment to strengthen our overall sustainability strategy, approach, and performance, download Turning the Tide on Water Quality: Axius Water’s 2020 Sustainability Overview.


People Served Worldwide

Countries with Running Systems

Proud Water Environment Federation (WEF) member