Roadway | Drainage | Traffic Control | Municipal Infrastructure
Civil engineering with senior level judgment and hands-on design.
J. Diaz Engineering LLC is a Lakeland-based civil engineering practice providing principal-led roadway, drainage and stormwater engineering, Civil 3D design, construction plans, and project support for municipal infrastructure.
Principal Led • Practical • Responsive
About
A small practice built around direct senior-level involvement.
The practice is intentionally small and flexible, allowing the principal engineer to remain directly involved in design while collaborating with specialized subconsultants as needed. Roadway geometry and drainage are developed together, with a focus on practical design, clear communication, and constructible solutions.
21+
Years of Experience
39742
FL Engineering Business
Services
Focused civil engineering support for municipal and consultant teams.
Prime or subconsultant support for smaller municipal, roadway, and drainage assignments.
Roadway Design
Horizontal and vertical geometric design
Widening, reconstruction and rehabilitation
Intersections, access roads, sidewalks and shared-use paths
Typical sections, grading, cross sections and pavement design
Traffic Control Plans
Temporary Traffic Control / MOT plans development
Roadway and municipal project support
Plan production integrated with roadway design
Drainage & Stormwater
Storm sewer systems, inlets and gutter-spread analysis
Culverts, cross drains, and roadside ditches
Pond sizing, attenuation, treatment and floodplain compensation
Nutrient-loading analysis
Civil 3D & Construction Plans
Horizontal and vertical geometric design
Widening, reconstruction and rehabilitation
Typical sections development and pavement design
Autodesk Civil 3D Corridor modeling
Municipal Infrastructure
Sidewalk and shared-use path improvements
Local road and access-road assignments
Roadside drainage and stormwater improvements
Constructible solutions for constrained corridors
Project Delivery & Technical
Support
Prime consultant or subconsultant delivery
Scope, fee, schedule and subconsultant coordination
QA/QC, peer review and senior technical troubleshooting
Estimates, specifications support and permitting coordination
Qualifications and Approach
Senior engineering involvement stays close to the work.
Principal-Led
Integrated
Hands-On
Flexible
Delivery Model
| Prime Consultant | Subconsultant | Technical Review |
|---|---|---|
| Small municipal roadway, sidewalk and drainage projects. | Senior roadway/drainage, Civil 3D, MOT and plan-production support. | QA/QC, independent plan review and senior engineering support. |
Contact
Let's discuss your project.
J Diaz Engineering LLC
Josue G. Diaz, PE
863-337-1320 | Lakeland, Florida
Florida Engineering Business Registry No. 39742
© 2026 J. Diaz Engineering, LLC
Florida Engineering Business 39742