Derector Offices

About Us


Founded in 1980, Robert Derector Associates (RDA) is a full service MEP engineering firm specializing in Commercial Tenant Interiors, Building Modernizations, Lease Assistance, Due Diligence Studies, and Infrastructure Upgrades. It is through our uncompromised attention to detail, constant concern for our clients' needs, and a pragmatic approach that has led RDA to be known as a premier consulting engineering firm in New York.

Robert Derector Energy & Sustainability

Our Energy and Sustainability Group provides analyses to help commercial tenants, building owners, and data center users understand how they use energy and where savings could be made. This group also offers utility provider rebate studies and is an approved Flextech engineer for NYSERDA.


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SIA Acoustics

SIA Acoustics is an acoustical consulting & design team based in NYC since 1988. Founded by Sam Berkow, SIA Acoustics serves the construction, design, performing arts, and production communities by coordinating with your project team to help define and meet goals for: ambient noise levels, acoustic isolation (privacy), tonal balance, and performance of technical systems.

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Robert Derector Telecommunications

Robert Derector Telecommunications (RDT) provides a full range of IT, Security and Multimedia/Audio-visual design, engineering, project management, and consultancy services all geared toward providing robust innovative solutions for today's work space. These services are offered in both traditional design strategy and as design-build for those who prefer "one-stop shopping."

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Robert Derector Mission Critical

Robert Derector Mission Critical (RDMC) is a team of professionals specializing in the design of critical data center space. These experts are dedicated to forging enduring relationships with their clients to achieve 100% facility uptime. This group of seasoned professionals also provides commissioning and Arc Flash services for all types of facilities.

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There is no such thing as a “small project.”

Throughout our history, we have never lost sight of our mission: high quality service, regardless of the project size. Whether a project is 100 square feet or 1 million square feet, we treat our clients with the same level of service, attention and sensitivity to meet their needs.

New York Office

19 West 44th Street
New York, NY 10036

New Jersey Office

10 Wilmot Street - 3rd Floor
Morristown, NJ 07960

South Florida Office

One SE Third Avenue
Miami, FL 33131

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