Gregory Halle based in Maine and cover all areas. Gregory Halle has been working throughout the Maine state for many years and has many years of experience working in Architectural & Engineering Services. Gregory Halle offer a full Architectural & Engineering Services. The Staff have expert Architectural & Engineering Services skills, which enable them to carry out minor to major Architectural & Engineering Services projects. Formed in 2010 , Gregory Halle specializes in Architectural & Engineering Services.