NEW YORK — George J. Pierson, president and CEO of Parsons Brinckerhoff Group Inc., announced that Subsurface Group Inc. has joined PB Energy Storage Services in the US Power and Energy Division of Parsons Brinckerhoff. Subsurface Group is a professional consulting and engineering firm providing services in underground injection, underground storage, specialty wells, petroleum and natural resources, and environmental science. Headquartered in Houston, the group also has offices in Baton Rouge, La., and South Bend, Ind. In its 2012 fiscal year, the 37-person Subsurface Group had revenues of approximately $50 million.

Said Pierson, “We are pleased to have the Subsurface Group as part of Parsons Brinckerhoff. The Subsurface Group’s recognized expertise in underground injection and specialty wells complements Parsons Brinckerhoff’s recognized expertise in underground storage for oil & gas, energy, and industrial clients.”

Joseph Sheldon, president and co-owner of Subsurface Group stated, “As part of our ownership transition plan, we are pleased to know that our employees will be part of an organization which is dedicated to technical excellence and will offer them career opportunities moving forward.”

John Fleniken, vice president and co-owner of Subsurface Group stated, “The complementary skill sets of both groups will combine to provide a unique and robust full service offering to our clients in the oil & gas, chemical, and industrial markets.”

In a letter to all employees of Parsons Brinckerhoff and Subsurface Group, Pierson stated, “The addition of Subsurface Group as a new part of our U.S. Power and Energy Division aligns with our strategic goal of expanding the services we can provide to the energy market.”