Senior Traffic Engineer

Build and strengthen the firm’s in-house transportation practice while working on bridge, roadway, and infrastructure projects across New Jersey and New York. Based in Edison, NJ (onsite), this Senior Traffic Engineer role supports NJDOT and NYSDOT clients and offers a positive work environment with a comprehensive benefits package. The position is designed for an infrastructure professional who can expand beyond traditional traffic engineering when the project requires it, providing technical leadership from planning through construction.

Compensation: Minimum $140,000, Maximum $170,000 per year. Final compensation will be determined based on individual candidate qualifications and location. Work authorization: Authorization to work in the United States is required; visa sponsorship is not available.

What you will do

• Perform and review traffic engineering analyses, including capacity analysis, signal analysis, intersection evaluation, and corridor studies (for example, Synchro, HCS)
• Lead and oversee preparation of Maintenance & Protection of Traffic (MPT) and staging plans for bridge and roadway projects
• Develop traffic control, signing, and pavement marking plans aligned with NJDOT, NJTA, NYSDOT, NYCDOT, and MUTCD standards
• Support and lead traffic impact studies and operational improvement initiatives
• Coordinate with structural and civil engineers to create staging solutions that are practical, cost-effective, and constructible
• Act as task lead and provide technical authority on traffic-related assignments
• Participate in site visits and constructability reviews to evaluate existing traffic conditions
• Provide technical support during construction administration
• Assist with agency coordination and client engagement related to traffic and work zone impacts
• Contribute to proposals, qualifications packages, and business development efforts to strengthen the firm’s transportation resume

What you bring

• Bachelor of Science in Civil Engineering or Electrical Engineering (transportation focus preferred)
• 8–25 years of traffic engineering experience, including DOT project experience
• NJ PE required; NY PE strongly preferred or ability to obtain
• Demonstrated experience with NJDOT, NJTA, NYSDOT, or NYCDOT standards and procedures
• Strong background in MPT/staging and work zone traffic control
• Experience with traffic analysis software such as Synchro, HCS, VISSIM, or similar tools
• Ability to manage multiple assignments, mentor junior staff, and work effectively in a team
• Strong written and verbal communication skills
• PTOE certification preferred
• Signal design and timing experience preferred
• Proficiency in AutoCAD preferred; MicroStation experience is a plus

Tools you will use

• Synchro, HCS, VISSIM
• AutoCAD, MicroStation
• MUTCD

Growth and practice-building opportunity

This role supports a strategic initiative to expand multidisciplinary transportation capabilities. You will help define processes, grow internal talent, and build a scalable traffic engineering group within a collaborative environment, with opportunities to lead technical efforts, support pursuit strategy, and mentor staff across disciplines and office locations.

About the team: LiRo-Hill is a 1100-person firm with offices in NYC, Long Island, Buffalo, Rochester, Boston, and Edison, NJ. The culture emphasizes collaboration and empowering employees to share ideas and maximize their potential.