Associated Construction Engineering, Inc. (A.C.E.), was established in 1987 and has become one of the largest mechanical/electrical professional consulting firms in the region. We currently staff offices in Belgrade, Billings, and Missoula, Montana; Minot, North Dakota; and Sheridan, Wyoming. Professional engineering services in the disciplines of mechanical, electrical, plumbing, fire protection, energy analysis and special systems are available for commercial, industrial and residential building projects.