O&S Associates | Explore Our Services

30 Years of Excellence

Founded on February 28, 1996, O&S is excited and thankful to celebrate our 30th Anniversary!

MESSAGE FROM OUR FOUNDER

DESIGN

DESIGN

PARKING STRUCTURES

Indoor parking garage with cars on both sides and signs saying 'Please Pay on Ground Floor'

Modern building facade with glass windows and reflections of nearby structures, tree branches in foreground.

ENVELOPE

Interior of an industrial facility with green and metallic pipes.

MEP

Architect's desk with blueprints, laptop, compass, and color swatches.

STUDIES

Exterior view of a City Hall building with columns and American flags.

COMPLIANCE

Our Locations

Choose your State

Roebling Suspension Bridge over the Ohio River with city skyline

Jefferson Memorial in autumn with colorful leaves and water in foreground.

WASHINGTON, DC

Jersey City skyline with tall buildings along the waterfront, viewed from across the river under a clear blue sky.

City skyline at sunset with tall skyscrapers and streets below.

NEW YORK CITY

Palm-lined street with cars, clear blue sky, and buildings on both sides.

Philadelphia City Hall with iconic clock tower, adjacent historic buildings, and cityscape background under a blue sky.

PENNSYLVANIA

Featured Projects

H Mart American Dream

East Rutherford, NJ

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Ocean Club

Atlantic City, NJ

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Drexel University Academy of Natural Sciences

Philadelphia, PA

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National Institute of Health, Building No. 10

Bethesda, MD

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John Glenn International Airport - Parking Garage

Columbus, OH

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Ocean 88 Condominium

Surfside, FL

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