Compressed natural gas infrastructure provider ampCNG has announced that it now completely owns all of the 17 public access CNG fueling stations that were part of a joint venture between the company and Trillium CNG.

All 17 stations will operate under the ampCNG name. The company also appointed Grant Zimmerman as its chief executive officer, assuming the role from Nate Laurell, a co-founder of ampCNG. Laurell will continue as executive chairman of the board.

“This transaction further strengthens our commitment to advancing CNG fueling infrastructure throughout the country and to helping make the transition to CNG as easy as possible for heavy-duty trucking fleets,” said Grant Zimmerman, CEO of ampCNG. “The collaboration with Trillium CNG enabled us to successfully grow our network of CNG stations, and we look forward to working together in our new independent capacities.”

Zimmerman joined ampCNG in February, 2015, as senior vice president of business development. Prior to ampCNG, Zimmerman was an associate principal at McKinsey & Company’s energy consulting practice. Zimmerman also worked at Enron in a variety of commercial and finance roles.

He holds a BBA and MPA from the University of Texas at Austin and an MBA from University of Chicago’s Booth School of Business.

“Over the past year Grant has played an integral part in helping us bring six new CNG stations into action,” said Nate Laurell, chairman of the board. “His intensity and proven experience creating and sustaining growth in the energy sector make him the right person to lead ampCNG as we build on our achievements to offer even more natural gas fueling solutions.”

The company’s network of fast-fill CNG fueling stations are located across the U.S. on heavily traveled highway corridors, supporting several large CNG fleets with partners in the food and beverage, agriculture and dairy industries.

Along with its parent company, AMP Americas, ampCNG currently operates stations in Texas, Indiana, Ohio, Florida, Georgia, Arkansas, North Carolina and Tennessee.

New station projects are under development to expand ampCNG’s footprint in Texas, Georgia, Illinois, Tennessee and California.