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Showcase Projects

Showcase Projects

Siefert Associates, LLC has successfully completed hundreds of projects since its inception.


Below is a sample of the projects that highlight our construction engineering capabilities in action. Imagine how our abilities can make your next project successful and profitable.


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Show All Structural Engineering Demolition Engineering Erection Engineering Geotechnical Engineering Accelerated Bridge Construction Engineering Heavy Lift and Rigging Engineering Additional Support Services
Alexander Hamilton Bridge & Highbridge Interchange Ramps Rehabilitation
Alexander Hamilton Bridge & Highbridge Interchange Ramps Rehabilitation
Bayonne Bridge - Replacement of Main Span Roadway & Approach Structures
Bayonne Bridge - Replacement of Main Span Roadway & Approach Structures
Emergency Declaration for SR 860 Culvert Failure
Emergency Declaration for SR 860 Culvert Failure
Gordie Howe International Bridge Project
Gordie Howe International Bridge Project
Green Line Extension Design Build Project
Green Line Extension Design Build Project
LaGuardia Airport Central Terminal Building Replacement Project
LaGuardia Airport Central Terminal Building Replacement Project
Long Island Rail Road Expansion Project - Floral Park to Hicksville
Long Island Rail Road Expansion Project - Floral Park to Hicksville
Middlebury Bridge Project
Middlebury Bridge Project
Newark Liberty International Airport - Terminal A Redevelopment Program
Newark Liberty International Airport - Terminal A Redevelopment Program
Moynihan Station Phase II
Moynihan Station Phase II
North Washington Street over Boston Inner Harbor
North Washington Street over Boston Inner Harbor
Reconstruction of Henry Hudson Bridge Toll Plaza & Lighting
Reconstruction of Henry Hudson Bridge Toll Plaza & Lighting
Reconstruction of I-84 - City of Waterbury
Reconstruction of I-84 - City of Waterbury
Repair/Rehabilitation of East Cambridge (Lechmere) Viaduct
Repair/Rehabilitation of East Cambridge (Lechmere) Viaduct
Replacement of Kosciuszko Bridge over Newtown Creek
Replacement of Kosciuszko Bridge over Newtown Creek
Replacement of MNRR Bridge over Atlantic Street Phase II
Replacement of MNRR Bridge over Atlantic Street Phase II
Rt 7 Hackensack River Wittpenn Bridge
Rt 7 Hackensack River Wittpenn Bridge
The New NY Bridge and the Former Tappan Zee Bridge
The New NY Bridge and the Former Tappan Zee Bridge
Throgs Neck Bridge - Replacement of Roadway Deck in Suspended Spans
Throgs Neck Bridge - Replacement of Roadway Deck in Suspended Spans
West Thames Pedestrian Bridge
West Thames Pedestrian Bridge
World Trade Center
World Trade Center

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