Transportation Project Engineer III/IV

Mannik Smith Group; Clayton (MO); On-site; USD 80,000 - 95,000; Full time

Benefits offered by this job

Competitive salary

Major medical, dental and vision insurance

401K

Paid holidays and generous paid time off

Professional development

Job summary

Mannik Smith Group is seeking a Transportation Project Engineer III/IV to join their team in Clayton, MO. The ideal candidate will have significant experience in transportation engineering, with a focus on design and project delivery. Key responsibilities include leading design efforts, overseeing junior engineers, and ensuring compliance with industry standards. Competitive benefits include salary, medical and dental insurance, 401K, and professional development opportunities. Join a dynamic environment at Mannik Smith Group and contribute to critical engineering projects.

Qualifications

• 5–12+ years of experience in transportation or roadway engineering required.
• Demonstrated technical competency in transportation engineering.
• Ability to produce and review complex engineering calculations.

Responsibilities

• Lead design and delivery of transportation projects including roadway geometrics.
• Develop and review engineering plans and calculations.
• Oversee junior engineers and ensure design document quality.

Skills

Transportation engineering expertise

Proficiency in MicroStation/OpenRoads

Advanced geometric design

Strong understanding of DOT standards

Education

Bachelor’s degree in Civil Engineering

Master’s degree preferred

Tools

MicroStation

AutoCAD Civil 3D

Job description

Transportation Project Engineer III/IV

Department: Transportation

Employment Type: Full Time

Location: St. Louis, MO

Reporting To: Tony Shenk

Description

Gonzalez Companies is a partner managed firm that provides comprehensive Planning, Design, and Construction Management Services to large and small Water, Sewer and Utility Districts; Departments of Transportation; and municipalities. We are currently seeking a Transportation Engineer (III/IV) to help serve our connection of clients and community. If you’re hungry for knowledge, ready to make a difference and dedicated to providing personalized attention to our clients, we want you on our team.

The projected range of compensation in Illinois for this job is $80,000 - $95,000.

Your Primary Responsibilities will include

• Lead or contribute significantly to the design and delivery of transportation projects, including roadway geometrics, intersections, pedestrian facilities, drainage, and traffic control.
• Develop and review engineering plans, models, and calculations using MicroStation/OpenRoads and/or AutoCAD Civil 3D.
• Prepare design reports, cost estimates, technical memos, specifications, and milestone submittals for DOT, LPA, or municipal agencies.
• Oversee and guide junior engineers, providing mentorship, task coordination, and quality review of design documents.
• Coordinate with project managers, clients, subconsultants, utilities, and permitting agencies to ensure project requirements and schedules are met.
• Perform advanced engineering analyses, troubleshoot design challenges, and propose effective technical solutions.
• Support or lead project planning, scope development, and discipline-level budgeting as experience allows.
• Participate in QA/QC reviews and ensure compliance with relevant DOT, municipal, and industry standards.
• Conduct occasional field investigations, site reviews, or construction support activities.

What you'll need

• Bachelor’s degree in Civil Engineering or related discipline; Master’s preferred for higher-level roles.
• Typically 5–12+ years of experience in transportation or roadway engineering with demonstrated technical competency.
• Proficiency with MicroStation/OpenRoads and/or AutoCAD Civil 3D, including advanced geometric design and plan development.
• Strong understanding of DOT, LPA, or municipal design standards, processes, and submittal requirements.
• Ability to produce, review, and refine engineering calculations, design packages, cost estimates, and technical documents.

Gonzalez Offers Competitive Benefits including:

• Competitive salary
• Major medical, dental and vision insurance
• Flexible Spending Account
• Health Savings Account
• 401K
• Bonus program
• Paid holidays and generous paid time off
• Professional development
• A team of creative and talented individuals to work alongside

Gonzalez is a rapidly growing, dynamic, professional services firm specializing in civil engineering, construction management, and construction inspection. Our clientele includes large and small water, sewer, and utility districts; departments of transportation and other public transportation agencies; and municipalities throughout the Midwest.

Working primarily in the Greater St. Louis, Chicago, and Louisville metro areas, Gonzalez offers a great work environment, generous benefit packages, and opportunities to succeed in many professional disciplines.

Equal Opportunity Employer

Gonzalez Companies, LLC provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.