One of the world's leading bridge engineering practices
Modjeski and Masters is an bridge engineering practice, providing design, analysis, inspection, and rehabilitation services for all types of fixed and movable bridges. Established in 1893, it is responsible for the design and long-term maintenance of many of the nation's most recognizable bridge structures, including arch, bascule, cable-stayed, girder, suspension, swing, truss, and vertical-lift structures. The practice also delivers engineering services for tunnels, pedestrian bridges, retaining walls, and custom bridge lighting, operating regional offices throughout the United States.
Mike BrittPresident
Quentin JohnsonVice President
Comprehensive design services for new fixed, movable, and specialty bridge structures.
Design of arch, girder, suspension, truss, and cable-stayed structures.
Design of bascule, swing, and vertical-lift structures.
Specialized design of pedestrian crossings and walkways.
Custom aesthetic and functional bridge illumination systems.
Inspection and structural assessment services to ensure condition, safety, and integrity.
Work in this area is organized into supported delivery tasks.
Support includes Structural repair.
Support includes preservation.
Support includes modernization to extend the useful life of existing bridges.
Support includes Work in this area is organized into supported delivery tasks.
Long-term asset management, maintenance planning, and technical support across all phases of a bridge's service life.
Engineering assessments and design of protective systems for critical bridge pier structures.
Work in this area is organized into supported delivery tasks.
Support includes design engineering for tunnel structures and related systems.
Support includes inspection.
Support includes rehabilitation services for transit.
Support includes utility tunnel structures.
Support includes Work in this area is organized into supported delivery tasks.
Geotechnical and structural design of retaining walls and earth-retaining structures.
Bridges · Transportation · Infrastructure · Government · Tunnels
Northeastern, PA · Bridges · 2026 · Client: Pennsylvania Turnpike Commission
A new three-rib steel deck arch structure serving a critical corridor of the Pennsylvania Turnpike Commission's Northeast Extension.
Quad Cities · Bridges
A major bridge replacement project connecting the Quad Cities across the Mississippi River.
New Orleans, LA · Bridges
Design of a comprehensive lighting system for the Crescent City Connection.
Louisiana · Bridges
Long-term preservation and engineering services for the historic Huey P. Long Bridge, protecting critical infrastructure over a 90-year lifespan.