Interface Engineering is a multidisciplinary engineering firm that provides mechanical, electrical, plumbing, fire protection, and technology design services. The company was founded in 1969 and is headquartered in Portland, Oregon. Interface Engineering has additional offices in San Francisco, California, and Seattle, Washington. The company's projects include commercial, healthcare, higher education, hospitality, and residential buildings. Interface Engineering has been recognized as one of the best places to work in Oregon by Oregon Business magazine.