Transportation Project Engineer I/II: Roadway & Traffic Design

Mannik Smith Group; St. Louis (MO); On-site; USD 41,000 - 76,000; Full time

Benefits offered by this job

Major medical, dental and vision

Flexible Spending Account

Health Savings Account

401K

Bonus program

Paid holidays and generous PTO

Professional development

Job summary

Gonzalez Companies, LLC in St. Louis, MO is seeking a Transportation Project Engineer I/II to join our Transportation department.

You will assist in design and development of roadways, intersections, and traffic improvements, and support preparation of project documents and submittals. The role requires a Bachelor’s degree in Civil Engineering and up to 5 years of related experience, with familiarity in MicroStation, OpenRoads, or AutoCAD Civil 3D.

Qualifications

• Bachelor’s degree in Civil Engineering or related field.
• 0–5 years of transportation/municipal infrastructure design experience.
• Experience with MicroStation/OpenRoads and/or AutoCAD Civil 3D.
• Understanding of geometric design principles, drainage, traffic control, and plan development.
• Ability to prepare or assist with design calculations, drawings, cost estimates, and technical documentation.

Responsibilities

• Assist in design and development of transportation projects including roadways, intersections, pedestrian facilities, and traffic improvements.
• Prepare engineering drawings, plans, and 3D models using CAD software (MicroStation, OpenRoads, AutoCAD Civil 3D).
• Perform basic to intermediate engineering calculations, including alignments, grading, drainage, quantities, and traffic control layouts.
• Support preparation of project documents such as cost estimates, technical reports, design summaries, and bid packages.
• Conduct field visits to support data collection, condition assessments, surveying coordination, or construction observations.
• Collaborate with senior engineers, project managers, and multidisciplinary teams to develop design solutions and ensure project quality.
• Assist with MoDOT, LPA, or municipal submittals and ensure adherence to design standards and guidelines.
• Review and interpret topographic surveys, geotechnical reports, environmental documents, and utility data.
• Coordinate with clients, utility companies, and permitting agencies as needed.
• Contribute to internal QA/QC processes, documentation, and design reviews.

Skills

Civil Engineering

0–5 years experience

MicroStation/OpenRoads

AutoCAD Civil 3D

Geometric design principles

Drainage

Traffic control

Plan development

Design calculations

Documentation

EIT/FE preferred

PE-track preferred

Education

Bachelor’s degree in Civil Engineering or related field

Tools

MicroStation/OpenRoads

AutoCAD Civil 3D

Job description

Gonzalez Companies, LLC in St. Louis, MO is seeking a Transportation Project Engineer I/II to join our Transportation department.

You will assist in design and development of roadways, intersections, and traffic improvements, and support preparation of project documents and submittals. The role requires a Bachelor’s degree in Civil Engineering and up to 5 years of related experience, with familiarity in MicroStation, OpenRoads, or AutoCAD Civil 3D.