Tri-State Design and Development, Inc. 
Multi-Disciplinary Consulting Engineering Firm

Tri-State Design and Development is a multi-disciplinary Consulting Architectural / Engineering firm serving both public agencies and private industry. We offer a wide range of engineering services. Our collective experience includes the design, construction management/inspection, and coordination of numerous industrial, institutional, and transportation projects. We have designed steel and prestressed concrete highway bridges, roadways, and structural rehabilitations and industrial facilities for heavy and light industries, commercial and educational buildings.

Tri-State Design and Development, Inc. is a Certified Minority Business Enterprise.

Tri-State Design's professional, high quality services are built upon proven engineering and project management skills. We have the experience necessary to successfully complete projects on-time and within budget.

Founded in 1983, Tri-State's leadership team is skilled in broad base design, supervision, project management, construction management/inspection, and administration. They oversee a project staff ready and able to handle the layout, design, field survey, field inspection, reports, rehabilitation design, construction plans and specifications, and other design services required for any project.

Over the years, we have steadily grown while actively providing civil, structural, electrical, HVAC, plumbing, fire protection, inspection and rehabilitation design, and construction inspection/management services. We can easily adapt our services to meet the project and our clients' needs. We negotiate in good faith, providing what and when we promise. Our reputation has been built around our clients' total satisfactions. Our growth is a result of support from our clients, friends, and our dedicated employees.

Our in-house staff includes Experienced Managers, Registered Professional Engineers and Surveyors, Construction Inspectors and CADD Designers. Our staff is equipped with the latest hardware and a library of up-to-date software. Our firm is well recognized for our work on public projects and buildings throughout Western Pennsylvania.

Cost Effective

Tri-State Design and Development utilizes a state-of-the-art CADD system with  AutoCAD and MicroStation software, backed by personal computers, printers, and a large library of structural design, analysis, traffic analysis, geometric design, HVAC systems design, lighting design and database software. This technology base is one of the reasons our team of highly experienced professionals can offer the key support that keeps projects on schedule and cost-effective, even under the most demanding time constraints.

A Comprehensive Line of Engineering Services

Tri-State Design and Development offers a comprehensive line of services, including:

  • Structural and Civil Engineering
  • Structural Inspection, Analysis, and Report
  • Highway and Bridge Design
  • Traffic Studies and Intersection Design
  • Field Survey
  • Construction Management/Inspection
  • Mechanical Engineering
  • Electrical Engineering
  • HVAC


 SR 1009 over Chartiers Creek

Tri-State Design and Development's portion of the award winning I-79 Meadowlands
Interchange Improvement Project.

Voted Road & Bridges' 6th Best Road Project of 2013 and the Engineering Society of
western Pennsylvania's (ESWP) 2013 Transportation Project of the Year.