Leadership Team

Rick Wilcox

Rick has applied his energy, experience, and passion for excellence to make vision reality for over 35 years. He is an entrepreneurial-minded business leader in the engineering and construction sphere, recognized as a pioneer in forging and implementing processes and systems that create transformative results. In addition to 20 years as CEO of a multi-disciplinary engineering firm, Rick has been a member of, or chaired, boards of diverse companies and organizations, been appointed to state energy and development boards, and was the youngest inductee to his alma matter’s Academy of Civil and Environmental Engineering.

Jamie Wallace
Chief Legal Officer

Jamie is a collaborative corporate leader with exceptional legal, business, and entrepreneurial acumen. Through his time as Assistant General Counsel of Brightmark, one of the most active developers in the dairy RNG space, and Vice President and General Counsel of Montauk Energy, one of the largest producers of RNG in North America, Jamie developed a deep knowledge of all facets of the RNG industry.

He’s negotiated a broad array of complex RNG agreements and has expertise in the RFS and LCFS programs. Jamie serves on various RNG advisory boards and is licensed to practice law in North Carolina and Pennsylvania.

Greg Montgomery

Greg is Managing Director of CleanSource Capital, a specialty environmental finance company.

He has successfully conceived, financed, and grown innovative entrepreneurial companies in both the clean energy and financial services sectors. 

He has a career in company and project finance including founding and/or building three different investment banking platforms.

Key Partners

As one of the largest electric and gas utilities in the U.S., Duke Energy embraces its responsibility to address risks from climate change, and Duke is an investor in SustainRNG.

Abundant Power Group exists to create and foster high growth companies serving niche markets in the clean energy economy and build environment. 

Board of Managers

Richard Fish
Bioenergy Devco

Greg Montgomery
CleanSource Capital

Elizabeth Paynter
Duke Energy

Shannon Smith
Abundant Power Group

Rick Wilcox

Board of Advisors

Garth Boyd
Context Agriculture Network

Aubrey Hillard
Texican Natural Gas

Erik Lensch
Leyline Capital

Jim Wallace
Senior Environmental Consultant


SustainRNG LLC was founded by CleanSource Capital LLC, based in Charlotte, NC, and is an affiliate of Abundant Power Group LLC.

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1447 South Tryon Street,
Suite 301
Charlotte, NC 28203

15169 N Scottsdale Road
Suite 205
Scottsdale, AZ 85254