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Our History

Firm Description

Founded in 1996, O&S Associates, Inc. (O&S) is a full-service multi-disciplinary architectural and engineering consulting and design firm. We are headquartered in Hackensack, NJ with branch offices in NYC; Bedminster, NJ; PA; OH; Washington DC; and FL.


O&S is led by V.P. Samy, the Founder and Principal of O&S, who brings over 40 years experience in engineering and directs a professional staff of over 100 with more than 30 registered professional engineers and architects. O&S has five principals within the firm, all of whom are involved in nearly every project at some level.

One key attribute that separates O&S from a typical engineering firm is the range and diversity of our experience. Our team of seasoned professionals excels in project leadership, teamwork, dedication, and cooperation, which provides our clients with superior designs and exceptional service. This expertise and our commitment to quality provide clients with the latest technologies and advances in materials and products.

O&S specializes in design and restoration, particularly structural/civil engineering and MEP services including historic preservation and facility renewal. Our engineering specialties include parking, MEP, structural, restoration, exterior envelope services, energy audits, façade law compliance, cogeneration, and HVAC. O&S provides sustainable design on all our projects. We maintain LEED Accredited Professionals as an effort to show our commitment to “Green” design.

We also have experience in serving as expert witnesses, preparing property condition assessments, energy management audits, and façade/exterior wall assessment reports, as well as overseeing construction bidding, construction management, and document preparation.

O&S has developed a wide-ranging portfolio of projects and expertise in both the public and private sectors. With over 1,200 clients nationwide, our clients include local, state, and federal government agencies, schools, universities, industrial and institutional clients, parking authorities, healthcare providers, developers, office properties and attorneys.

Engineering, architecture, mechanical engineering, electrical engineering, plumbing, civil engineering, HVAC, structural, architecture day