Alpine Investors-backed Waggoner Engineering, a full-service economic development, planning, program management, and engineering firm, agreed to merge with Manchac Consulting Group, a professional civil/environmental engineering and operations firm. Financial terms were not disclosed. “The addition of Manchac and its subsidiaries furthers Waggoner’s overall offerings as we strive to improve the quality of life of our clients and their communities,” Matt Butler, Waggoner President and CEO.