O&S designed a new 4-story garment manufacturing building in Astoria, Queens, with textile production areas, office spaces, rooftop solar canopies, and compliance with NYC’s Energy Code and sustainable roofing requirements.

O&S Associates delivered full design services for H Mart's 35,000 SF space at American Dream Mall, completing a grocery area and food court with commercial kitchens, emergency systems, and public amenities.

Co-op City’s parking garages required extensive structural repairs due to deterioration and partial collapses. O&S conducted an in-depth analysis, created repair designs, and provided construction oversight, ensuring safe, restored parking structures for the largest cooperative housing development in the world.