Project Engineer III/IV - Water/Wastewater

About the role

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.

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.

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; 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.

Requirements

• 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.

Skills

• 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.

Benefits

• 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