New Construction Plumbing & Mechanical Superintendent

About Joseph J. Magnolia (“JJM”)

For over 75 years, Joseph J. Magnolia Inc. has proudly served the DC metropolitan area as a premier contractor specializing in commercial new construction, providing expert plumbing and mechanical solutions to our customers.

We believe the best service starts with the best people, so we hire the best and invest in their success.

Joseph J. Magnolia (“JJM”) is currently seeking an experienced Plumbing & Mechanical Superintendent to join our New Construction team. This role is responsible for overseeing the installation, coordination, and execution of commercial plumbing and mechanical systems on large-scale ground-up construction projects, ensuring all work is completed safely, efficiently, and in accordance with project plans, specifications, and applicable codes.

 
A $5,000 signing bonus is available for qualified candidates.  

Responsibilities

• Partner with the Project Manager to support cost control, labor planning, forecasting, and schedule management. 
• Participate in BIM coordination meetings for all MEP systems. 
• Utilize coordinated BIM models for field layout, clash detection, and resolution of system conflicts. 
• Identify, submit, and manage RFIs related to plumbing and mechanical scope. 
• Review and manage submittals to ensure compliance with project specifications. 
• Oversee all phases of plumbing and mechanical installation from underground through commissioning. 
• Direct and coordinate daily activities of plumbing and HVAC subcontractors and vendors. 
• Perform quality control inspections including pressure testing, leak detection, and system verification. 
• Lead equipment start-up, testing, balancing (TAB), and commissioning of mechanical systems. 
• Ensure all work is completed safely and in compliance with project plans, specifications, and applicable codes. 
• Coordinate material deliveries, logistics, and site installations to maintain schedule integrity. 
• Support final turnover and ensure full system operational readiness. 
• Enforce safety standards and maintain a safe jobsite environment. 
• Communicate project status, issues, and solutions with project stakeholders.

• Minimum 7 years of experience in plumbing and/or HVAC systems. 
• Journeyman Plumbing or HVAC license preferred. 
• Journeyman Gas Fitting license preferred. 
• Strong knowledge of plumbing and mechanical codes (IPC, IMC, and local codes). 
• OSHA 30 certification required or ability to obtain prior to start. 
• Experience supervising crews and subcontractors on commercial construction projects. 
• Experience with ground-up, large-scale commercial projects ($5M–$20M preferred). 
• Strong understanding of plumbing systems from underground through completion. 
• Experience with HVAC equipment start-up and commissioning (chillers, boilers, cooling towers, rooftop units). 
• Experience with hydronic and refrigeration piping systems. 
• Proficient with construction software (Procore, Bluebeam, or similar). 
• Ability to read drawings and specifications. 
• Strong communication and leadership skills. 
• Valid driver’s license required.

Benefits & Culture

• Company Truck & Fuel Card.
• Medical benefits starting the first of the month, plus company-paid life insurance and long-term disability.
• Company contributions to 401(k). 
• Employee Assistance Program (EAP).
• Company-paid Basic Life Insurance Policy.
• Paid time off.
• 7 Paid Holidays.
• Opportunity to pursue trade school and ongoing professional development.

As part of our standard hiring process, this role requires completion of a background check and drug screening following an offer of employment.