Gilsanz Murray Steficek | 3,579 followers on LinkedIn. Structural Engineering and Building Envelope Solutions | Gilsanz Murray Steficek is a structural engineering and building envelope consulting firm committed to creating solutions. We approach each project from a comprehensive point of view, and the diverse skills of GMS professionals allow them to take an integrated approach to building design and offer consulting services for structural, building envelope, roofing, and inspection-related aspects of any project. Among GMS’ extensive portfolio are award-winning tall office and residential towers, theaters, housing, healthcare, educational buildings, sports facilities, retail stores, transportation projects, sculptures, landmarks, and special structures located across the country and abroad.