GHK Capital Partners, a middle-market private equity firm, completed the acquisition of WSB & Associates, an infrastructure engineering consulting firm serving transportation, and EST, an engineering firm. Financial terms were not disclosed. "We are thrilled to partner with the WSB team. We believe WSB, led by its entrepreneurial leadership team, is well-positioned for future growth and represents a fantastic entry point to play multiple compelling secular trends in the critical infrastructure space." Gil Klemann, GHK Managing Partner.