Professional Service Directory

Gilsanz Murray Steficek, LLP


Gilsanz Murray Steficek is a structural engineering and building envelope consulting firm committed to quality design.  We approach each project from a holistic point of view and the diverse skill sets of GMS professionals allow them to take a comprehensive approach to building design and to offer consulting services for the structural, building envelope, roofing and inspection-related aspects of any project.
Among GMS’s extensive portfolio are award-winning tall office and residential towers, theaters, housing, educational buildings, sports facilities, retail stores, transportation projects, sculptures, landmarks and special structures.  These projects are located across the country as well as abroad.  Recent projects include the structural design of Frank Gehry’s New World Symphony in Miami Beach, the façade restoration at New York’s iconic Grace Building, design of the structure and façade at 510 Madison Avenue, structural design for a high rise in Abu Dhabi’s Central Market, and roofing and waterproofing at Carnegie Hall.
Our clients include public and non-public institutions, building and property owners, developers, contractors building managers, architects and engineers in other trades.  No matter who the client is, GMS is committed to fostering strong personal relationships.  We approach every project by listening attentively.
Founded in 1991, Gilsanz Murray Steficek is headquartered in New York with offices in New Jersey and California.  The staff of 100 includes structural engineers, building envelope architects and inspectors – many with unique specializations and 33 of whom are registered professionals.


129 West 27th Street, 5th Floor
New York, NY 10001
Tel: 212-254-0030
Fax: 212-477-5978


Victoria Arbitrio, PE, SECB

Firm Established



Achim Hermes, PE

Ramon Gilsanz, PE, SE

Philip Murray, PE

Gary Steficek, PE

Joseph T.  Blanchfield, AIA

Karl Rubenacker, PE, SE

Anthony J. Pagnotta, PE

Joseph W.  Basel, PE

Jonathan C.  Hernandez, PE

Susanne Mackiw, AIA

Type of Work

Engineer - Structural

AIA New York Chapter
536 LaGuardia Place
NY, NY 10012
(212) 683-0023

Gallery Hours
Mon-Fri: 9am to 8pm
Sat: 11am to 5pm

Office Hours
Mon-Fri: 9am to 5pm