Plumbing Engineer/Designer - Seattle, WA

Tetra Tech; Seattle (WA); Hybrid; USD 100,000 - 135,000; Full time

Job summary

Glumac, a Tetra Tech company, is expanding its plumbing engineering group and seeking an experienced Senior Plumbing Engineer/Designer who will lead plumbing and process piping design from concept through construction administration. You will produce calculations, advise on system options, and coordinate with multidisciplinary teams on healthcare, commercial, multifamily, and education projects.

The role requires strong communication, sustainable design focus, and the ability to mentor staff.

Qualifications

• 5+ years in consulting, construction, or similar.
• Valid PE license or CPD certification.
• Proficient in Revit (BIM).
• Strong plumbing design experience (commercial, healthcare, process, multifamily residential and/or manufacturing).
• Clear communicator, organized, solution oriented, able to work independently.
• Applicants must be currently authorized to work in the United States on a full-time basis.

Responsibilities

• Lead plumbing piping designs and prepare construction documents.
• Perform plumbing calculations including fixture counts, booster pump head, hot water loads, storm water, and condensate collection.
• Coordinate with ownership, mechanical, electrical, structural, and architectural teams.
• Support Construction Administration: RFIs, submittal reviews, site visits, and field reports.
• Adhere to QA/QC policies and escalate issues as needed.
• Mentor junior engineers/designers and help grow the local plumbing team.
• Assist with Business Development opportunities when needed.

Skills

Plumbing design

Communication

Independent work

Education

Professional Engineer (PE) license

Tools

Revit (BIM)

Job description

The Opportunity

Glumac, a Tetra Tech company, is expanding our plumbing engineering group and is seeking an experienced Plumbing Engineer/Designer who is passionate about sustainable design and ready to take a lead role on diverse projects. This is an opportunity to work on a wide variety of projects, including healthcare, commercial, multifamily, and educational buildings. Short-term responsibilities include leading plumbing designs and supporting construction administration; long-term career growth includes building and leading a regional plumbing practice and shaping standards and workflows within the group.

Position Summary

The Senior Plumbing Engineer/Designer will lead plumbing and process piping consulting and design efforts from Schematic Design through Construction Administration. The successful applicant will be responsible for plumbing system calculations, consulting clients on system options, technical design deliverables, coordination with other disciplines, QA/QC compliance, and mentoring junior staff. The role requires regular collaboration with internal and external project teams and regular site visits for field observation and investigation. The ideal candidate is a self-directed, solution-oriented professional with strong communication and organizational skills and a commitment to sustainable practices.

Essential Job Functions

• Lead plumbing piping designs and prepare construction documents.
• Perform plumbing calculations including: fixture counts, booster pump head, ejector pump head, domestic hot water loads (including heat pump design), storm water, condensate collection, etc.
• Coordinate with ownership, mechanical, electrical, structural, and architectural teams.
• Support Construction Administration: RFIs, submittal reviews, site visits, and field reports.
• Adhere to QA/QC policies and escalate issues as needed.
• Mentor junior engineers/designers and help grow the local plumbing team.
• Assist with Business Development (BD) opportunities when needed.

Required Qualifications

• 5+ years in consulting, construction, or similar.
• Valid PE license or CPD certification.
• Proficient in Revit (BIM).
• Strong plumbing design experience (commercial, healthcare, process, multifamily residential and/or manufacturing).
• Clear communicator, organized, solution-oriented, able to work independently.
• Applicants must be currently authorized to work in the United States on a full-time basis; this position is not eligible for current or future employment visa sponsorship.

Preferred Qualifications

• Medical gas or process piping experience (certifications a plus).
• LEED, LFA, or sustainability credentials (experience with water harvesting/treatment and heat pump water heaters a plus).
• Water treatment knowledge (experience with water softeners, descalers, interceptors, and similar treatment devices a plus).
• Fire protection knowledge (experience with wet/dry systems and dry‑agent suppression systems a plus).
• Project Management, Business Development, or prior team leadership experience.

Work Environment and Location

This position offers a hybrid work environment, with a requirement of two in-office days per week in our Seattle, WA office. All candidates must be located in and eligible to work in the U.S.

Compensation

Salary Range: $100,000 - $135,000
The base salary range represents the low and high end of the compensation scale for this role. Actual salaries will be determined based on location, experience, responsibilities, and qualifications. This salary range is just one component of Glumac’s total compensation package, which includes benefits, professional development opportunities, and additional incentives.

Why Glumac, a Tetra Tech Company

Glumac has been a leader in the sustainable building design industry for over 50 years. In 2017 we joined Tetra Tech, enabling us to combine our expertise with the reach and resources of a prestigious global organization.

At Tetra Tech, we are Leading with Science to solve the world’s most complex challenges. Our industry-leading experts in engineering and consulting are committed to driving positive change in communities around the world. For nearly 60 years, we have been at the forefront of innovation and sustainability. Today we stand as a market leader, offering cutting‑edge solutions in water, environment, energy, and international development. Our work has improved more than 625 million lives around the world.

Your Impact

Join Glumac, a Tetra Tech company, to make a real difference. Our work leverages cutting‑edge technologies, advanced analytics, and the expertise of world‑class scientists and engineers to create meaningful change around the world. Discover your full potential – join us to advance your career while leaving a lasting legacy.

Life at Glumac, a Tetra Tech Company

• Comprehensive and market‑competitive benefits.
• Merit‑based financial rewards.
• Flexibility and company‑wide commitment to work/life balance.
• Collaborative team atmosphere that values the contributions of all employees.
• Learning and development opportunities for ongoing professional growth.

About Tetra Tech

Tetra Tech is the leader in water, environment, and sustainable infrastructure, providing high‑end consulting and engineering services for projects worldwide. Our 25,000 employees work together to provide clear solutions to complex problems by Leading with Science® to address the entire water cycle, protect and restore the environment, design sustainable and resilient infrastructure, and support the clean energy transition.

Tetra Tech is proud to be an Equal Opportunity Employer. All qualified candidates will be considered without regard to race, color, religion, national origin, age, disability, sex, marital or familial status, status as a protected veteran, or any other characteristic protected by law. Tetra Tech is a VEVRAA federal contractor and we request priority referral of veterans.

We invite applications from all interested parties.