Founded 1893
Modjeski and Masters
Mechanicsburg, United States
Specialist bridge engineering firm providing design, inspection and rehabilitation services for long-span, movable and complex bridge structures, serving state transportation departments, port and turnpike authorities, and railroads across the United States.
- Headquarters
- Mechanicsburg, United States
- Founded
- 1893
- Website
- www.modjeski.com
- Legal name
- Modjeski and Masters, Inc.
Geographic coverage
- United States
Notable facts
- Founded in 1893 by Ralph Modjeski in Chicago; the current firm name dates to a 1924 partnership with Frank Masters.
- Marked over 130 years of continuous operation as of its stated history, making it one of the oldest bridge-engineering-only firms in the US.
- Acquired Flanders Engineering Group in 2022, expanding its practice.
Service categories
Sources. This profile is compiled from public reference data, WebSearch-verified againstsource 1 · source 2 · source 3. Data as of 2026-07-11. See methodology.
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