BonTerra Psomas Employee Directory
Environmental ServicesUnited States1 Employees
BonTerra Psomas is the product of a merger between BonTerra Consulting and Psomas, an engineering consulting firm with a history spanning more than six decades. The combined entity will operate as a subsidiary of Psomas and concentrates on environmental planning and resource management consulting, building on BonTerra's long-time presence in Southern California since 1996. Operating in the environmental services sector, the firm serves clients seeking guidance on planning and managing environmental resources as part of their projects. The broader Psomas organization provides an established engineering and consulting platform, helping position BonTerra Psomas within the United States market. In November 2025, Psomas expanded its offices to Glen Ellyn, Illinois, signaling geographic growth for the broader firm.