Trilon Group

Infrastructure consulting for transportation and water

Project Engineer 3/4 - Water/Wastewater

Water Resources EngineeringUpdated on Nov 13

Full-timeSt. Louis, MO, USA$40 - $55 /hrIn-person

About the Job

Requirements

A bachelor's degree in Civil, Environmental, or a related engineering field is required.
EI/EIT certification is required; PE registration is preferred or in progress.
Four to eight or more years of experience in water/wastewater design, permitting, or construction support is required.
Proficiency with hydraulic modeling tools such as WaterGEMS, SewerGEMS, InfoWater, or SWMM is required.
Strong experience with AutoCAD and Civil 3D is required.
Experience with pump systems, process equipment, site layout, and utility design is required.
Strong analytical, project management, and problem-solving skills are required.
Leadership, communication, and client coordination abilities sufficient to mentor junior engineers are required.

Responsibilities

Lead the design, analysis, and technical oversight of water and wastewater treatment facilities, pump stations, pipelines, and related infrastructure.
Prepare and review engineering calculations, design drawings, specifications, and technical reports.
Conduct hydraulic modeling and system analysis to optimize water distribution and sewer collection networks.
Manage field investigations, site assessments, and construction observation, and provide technical guidance to junior engineers.
Develop project scopes, cost estimates, schedules, and proposals, and support project management activities.
Coordinate multidisciplinary teams to ensure integrated and compliant project designs.
Review designs for compliance with design standards, regulatory requirements, and permitting processes.
Serve as a point of contact for clients, contractors, and regulatory agencies, and communicate technical information.
Mentor and support junior staff, and uphold quality control and company engineering standards.

Desired Qualifications

Knowledge of BIM or Revit is preferred.
PE registration is preferred or may be in progress.

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 Project Engineer (III/IV) - Water/Wastewater 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 base salary range for this role is indicated in the posting. This range reflects the company’s good faith estimate of the compensation for this position at the time of posting. Final compensation will be determined based on factors such as experience, skills, qualifications, internal equity, and geographic location.

Lead the design, analysis, and technical oversight of water and wastewater treatment facilities, pump stations, pipelines, and related infrastructure.
Prepare and review engineering calculations, design drawings, specifications, and technical reports.
Conduct hydraulic modeling and system analysis to optimize water distribution and sewer collection networks.
Manage field investigations, site assessments, and construction observation; provide technical guidance to junior engineers.
Develop project scopes, cost estimates, schedules, and proposals; support project management activities.
Coordinate multidisciplinary teams to ensure integrated and compliant project designs.
Review and ensure compliance with design standards, regulatory requirements, and permitting processes.
Serve as a point of contact for clients, contractors, and regulatory agencies; communicate technical information clearly and effectively.
Mentor and support junior staff; uphold quality control and company engineering standards.

Bachelor’s degree in Civil, Environmental, or related engineering field.
EI/EIT required; PE registration preferred or in progress.
4–8+ years of experience in water/wastewater design, permitting, or construction support.
Proficiency with hydraulic modeling tools (WaterGEMS, SewerGEMS, InfoWater, SWMM, etc.).
Strong experience with AutoCAD/Civil 3D; BIM/Revit knowledge preferred.
Demonstrated experience with pump systems, process equipment, site layout, and utility design.
Excellent analytical, project management, and problem-solving skills.
Strong leadership, communication, and client coordination abilities; capable of mentoring junior engineers.

About the Company

Trilon Group

Infrastructure consulting for transportation and water

Trilon Group provides infrastructure consulting in transportation, water, and municipal systems in the Mid-Atlantic region. It works by partnering with local governments, municipalities, and private clients to deliver planning, design support, and project management through fee-based engagements, expanding capabilities through alliances with firms like Rinker Design Associates and Wilson Engineers. The company differentiates itself with a platform-style growth approach backed by private equity and a People First culture focused on talent development. Its goal is to expand service offerings and market presence in the Mid-Atlantic by building scalable partnerships and using capital to support growth.

Company size: 51-200
Company stage: Growth Equity (Non-Venture Capital)
Total funding: $200M
Headquarters: Denver, CO
Founded: 2021

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