Plumbing Engineer Position

Company Overview

Since 1954, Jarrell Mechanical Contractors has been building trusted partnerships in St. Louis and nationwide. As a family-owned, full-service mechanical contractor, we provide end-to-end design-build MEP solutions, from preconstruction and engineering to installation and ongoing service. Our in-house expertise and state-of-the-art prefabrication shops give us unmatched control over quality, safety, and schedule from the start. Specializing in HVAC, plumbing, piping, refrigeration, and control systems, we deliver efficient, high-performing solutions built for long-term reliability. From data centers and manufacturing facilities to schools and multifamily housing, customers trust us for hands-on expertise, innovative engineering, and our commitment to quality, safety, and performance.

Position Overview

We are seeking Plumbing Engineers to join our Design-Build Engineering team. This position is responsible for the design, coordination, and implementation of plumbing systems that support the successful delivery of commercial, industrial, healthcare, educational, and institutional construction projects.

You will work closely with project managers, estimators, BIM/VDC personnel, fabrication teams, field leadership, owners, and architects throughout all phases of project delivery. This role focuses on developing practical, cost-effective, and constructible plumbing system solutions that support project success from preconstruction through commissioning.

Candidates ranging from recent engineering graduates to experienced plumbing engineers are encouraged to apply.

• Design plumbing systems for commercial and industrial facilities, including domestic water, sanitary, storm, and medical gas systems.
• Produce and review drawings, layouts, and specifications in accordance with project requirements and code compliance.
• Collaborate with architects, GCs, and internal teams to ensure coordinated, constructible designs.
• Participate in preconstruction efforts such as budgeting, value engineering, and system selection.
• Support field installation through coordination, clarifications, and site visits.
• Review submittals and assist with final turnover documentation.

• Plumbing design experience in the commercial construction industry is a plus.
• Familiar with local plumbing codes.
• Experience with BIM tools like Revit and CAD software like AutoCAD a plus.
• Effective communicator who enjoys working cross-functionally with field teams and project partners.
• Detail-oriented, responsive, and focused on delivering real-world solutions.

At Jarrell Mechanical Contractors, you’ll be part of a growing organization with a strong reputation in the mechanical contracting industry. We offer a collaborative environment where your contributions will directly impact operational success. 

Competitive salary based on experience and a comprehensive benefits package including health, dental, and life insurance, as well as 401(k) matching.

• Work with a respected, established mechanical contractor with a strong reputation
• Be part of a team that values long-term relationships and repeat business
• Gain exposure to complex, high-impact projects across multiple market sectors
• Clear path for long-term growth