PennDOT Districts 6-0, 5-0, 4-0, and 8-0
Bridge design, rehabilitation, inspection, and rating support
Experience framing for district-level highway bridge work across Southeastern Pennsylvania.
Bridge Engineering • Deisgn • Inspection • Testing
Specialty Engineering, Inc.
A bridge engineering firm, part of H&J International, PC, providing consulting and research engineering services for public agencies, transportation owners, and engineering partners throughout Pennsylvania, New Jersey, and the surrounding region.
About H&J + Specialty Engineering, Inc.
A bridge engineering firm strengthened by H&J International.
In 2024, Specialty Engineering, Inc. (SEI) became part of H & J International, P.C. (HPC), bringing together Specialty Engineering, Inc.’s bridge expertise with H&J International, PC’s broader engineering resources. The merger delivers capacity, capability, and maintains a DBE-backed platform.
Bridge Engineering expertise with expanded support.
Specialty Engineering, Inc. remains focused on practical bridge engineering: design, analysis, load rating, rehabilitation, inspection, structural testing and health monitoring for highway and railroad infrastructure.
Through its integration with H & J International, P.C. (HPC), Specialty Engineering, Inc. can support clients with greater operational capacity, broader transportation and civil coordination, and the same commitment to quality, continuity, and technical depth that has defined both firms for XX years.
2024 integrationSpecialty Engineering, Inc. joined H & J International, P.C. (HPC)
through a strategic acquisition that expanded the firm’s capabilities in bridge and structural
engineering.
Specialty Engineering, Inc. Core DiciplinesSpecialty Engineering, Inc. continues to deliver consulting and research
engineering for highway and railroad bridges, structural systems, and transportation
infrastructure.
H&J platformH&J International, PC adds broader resources, project-delivery
support, and DBE alignment that help Specialty Engineering, Inc. serve clients with more capacity and flexibility.
Leadership continuityDr. Yinbo Liu, P.E., President, leads the integrated
frim, while President Emeritus and founder Dr. Leon Lai, P.E., S.E. with Vice President Peter Kim, P.E. continue to support Specialty Engineering, Inc.’s technical leadership, operations,
and client relationships.
Values & Objectives
What guides Specialty Engineering, Inc.’s work.
Specialty Engineering, Inc.’s goal is simple: keep the region’s bridges and structures safe, serviceable, and built to last — while growing a technical team that owners trust and engineers want to join.
01
Safety & Public Trust
Every inspection, rating, and design decision protects the people who rely on the structures we touch. Public safety is the standard behind all of Specialty Engineering, Inc.’s recommendations.
02
Technical Excellence
Research-grade analysis, testing, and monitoring applied to real-world structures — practical answers backed by rigorous engineering, not guesswork.
03
Partnership & Growth
As part of H&J International, PC, Specialty Engineering, Inc. pairs specialty bridge focus with a broader DBE-backed platform — growing capabilities, careers, and long-term client relationships together.
Specialty Engineering, Inc. in the field
Infrastructure experience, seen up close.
These photos reflect some of the transportation structures Specialty Engineering, Inc. supports through inspection, analysis, rehabilitation, and field engineering services.
Bridge & Viaduct EngineeringDesign, evaluation, and field
support
Historic Arch StructuresRehabilitation and structural
assessment
Tunnel InspectionCondition assessment and field
documentation
Urban TransportationHighway ramps and complex
infrastructure
Services
Bridge-focused engineering, inspection, testing, and specialty support.
Specialty Engineering, Inc. supports bridge owners, transportation agencies, rail clients, and engineering partners with inspection, load rating, rehabilitation design, structural testing, health monitoring, and specialty access services.
01
Service 01
Bridge Design & Rehabilitation
Design, repair, replacement, strengthening, and rehabilitation support for highway and railroad bridges.
02
Service 02
Bridge Inspection & Analysis
NBIS-aligned inspection support, field documentation, load rating, and structural analysis for existing bridge assets.
03
Service 03
Structural Testing & Health Monitoring
Load testing, nondestructive evaluation, strain gaging, data acquisition, and remote structural health monitoring.
04
Service 04
Seismic / Fatigue & Fracture Evaluation
Rigorous seismic analysis, fatigue and fracture evaluation, and special structural assessment for complex structures.
05
Specialty Services
Additional Services
In addition to bridge design, analysis, and inspection, Specialty Engineering, Inc.'s capabilities include a wide range of structural engineering expertise for complex infrastructure challenges.
Projects / Experience
A glimpse of our work for regional transportation owners.
Representative experience includes highway and railroad bridges, rehabilitation programs, structural inspections, load ratings, field testing, and transportation infrastructure assignments throughout the region.
DRPA / PATCO
Major bridge and rail infrastructure support
Specialty bridge and structural engineering support for regional transportation assets.
NJDOT / SEPTA / NJ TRANSIT
Multimodal bridge and structural engineering
Experience language suitable for public-sector transportation owners and proposal reuse.
View the Full Project Portfolio →
Detailed experience across bridge design, inspection, testing, seismic, fatigue, and tunnel programs.
News & Insights
Latest from Specialty Engineering, Inc.
Updates on firm capabilities, project milestones, team growth, and industry involvement.
June 2025 : Specialty Engineering, Inc. Expands Bridge Inspection & Structural Testing Capabilities
Specialty Engineering, Inc. continues to grow its portfolio of bridge inspection, load rating, structural testing, and health monitoring services for complex transportation infrastructure across Pennsylvania and New Jersey.
Read more →May 2025 : Rehabilitation & Specialty Engineering for Regional Bridge Owners
Specialty Engineering, Inc. delivers rehabilitation, evaluation, and specialty engineering services for highway, railroad, and movable bridge assets throughout the region.
Read more →April 2025 : Specialty Engineering, Inc. + H&J International, PC: Growing Together Across the Transportation Market
Team updates, leadership visibility, and professional engagement across Pennsylvania, New Jersey, and surrounding markets as Specialty Engineering, Inc. expands its footprint within the H&J International, PC family.
Read more →March 2025 : Specialty Engineering, Inc. Engineers Recognized at Regional Transportation Conference
Specialty Engineering, Inc. professionals participated in regional industry events, presenting on advanced inspection methodologies and structural health monitoring for aging infrastructure.
Read more →Careers
Build a bridge-focused engineering career with Specialty Engineering, Inc. + H&J International, PC.
Specialty Engineering, Inc.’s careers section should speak directly to structural and bridge professionals who want hands-on project work, mentorship, technical depth, and growth opportunities.
Open roles
Bridge engineers, designers, and inspectors
Role families include senior bridge engineer, senior bridge designer, and bridge designer / inspector.
Why Specialty Engineering, Inc.
Specialty work with broader platform support
Specialty Engineering, Inc. offers bridge-specialty focus with H&J International, PC-backed growth, DBE opportunities, and expanded project reach.
Apply
Send resume and qualifications
Email employment@sei-engineers.com for current opportunities and future consideration.
Locations
Serving Pennsylvania, New Jersey, and the surrounding region.
With offices in Bristol, Blue Bell, and Philadelphia, Specialty Engineering, Inc. supports transportation and structural engineering assignments across Pennsylvania, New Jersey, and the surrounding region.
Headquarters
Bristol, PA
422 Mill Street
Bristol, PA 19007
Phone: (215) 785-5350
Office
Blue Bell, PA
1787 Sentry Parkway West, Suite 110
Blue Bell, PA 19422
Phone: (215) 785-5350
Office
Philadelphia, PA
1628 JFK Blvd
Philadelphia, PA 19103
Contact
Connect with Specialty Engineering, Inc.
Contact Specialty Engineering, Inc. to discuss bridge inspection, load rating, rehabilitation, structural testing, structural design, or teaming opportunities.
Talk with Specialty Engineering, Inc.
Phone: (215) 785-5350
Email: employment@sei-engineers.com
Primary office: 422 Mill Street, Bristol, PA 19007
Services: Bridge design, rehabilitation, inspection, load rating, testing, and specialty engineering support.