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Plumbing Design Engineer

At MacDonald-Miller Facility Solutions (“MacMiller”) As the Northwest’s leading mechanical contracting firm, we design, deliver and service HVAC, plumbing and automation system solutions for commercial buildings. With our over 1500 employees across 14 offices, there is a breadth and variety of work to keep you engaged and inspired. 

We enjoy a well-respected history of exceeding our customers’ expectations and . Our clients trust their toughest projects with our integrated teams, including: 

  • New construction – Engineering, fabrication and installation of mechanical systems for new projects following lean construction practices 
  • Special projects – Retrofits and mechanical repairs for existing buildings for new efficiencies 
  • Service - scheduled preventative maintenance ensuring tenant comfort, and 24/7 emergency response 
  • Building performance – Control systems, fault detection, energy services and remote monitoring 
  • Performance Contracting -- Sustainable Solutions: Acting as the Prime Contractor, we deliver design-build energy-efficient solutions in the built environment for private and public sector clients

People love to work at MacDonald-Miller, and it’s because we all share the same 

  • Diverse players, one team, a common vision. Collaboration is our foundation and critical to the success of the company. Every team member is valued and brings a diversity of strengths to help us meet our common vision.
  • We are dedicated to personal and professional excellence. We execute with distinction by doing the right thing and following through on our commitments.
  • Everyone deserves a safe workplace. Safety is more than hardhats and boots, it’s an attitude and the environment we create. Every day, everyone goes home to their families.
  •  We are proud to be part of MacDonald-Miller. We actively seek to build relationships and know each other as individuals. Together we create an environment that is welcoming, caring, and trusting.
  • We are committed to continuous. Innovation is how we stay an industry leader. We always strive to challenge and better ourselves.
  • Take the work seriously, but never take ourselves too seriously. It’s possible to be both serious professionals and good-natured people you enjoy working with. We strive to be both.

Plumbing Design Engineer: This is where you come in.

We’re seeking a Plumbing Design Engineer to collaborate with a talented team responsible for the layout, design, and coordination of commercial plumbing projects. In this role, your hard work and ability to drive results won’t go unnoticed - you’ll be rewarded with increased ownership, significant growth opportunities, and a level of autonomy you likely haven’t experienced before.

Top 3 ways to make an impact in your first year:

  1. Produce exceptional designs – Deliver fully coordinated, accurate plumbing designs on time, with no errors.
  2. Exceed budget expectations – Meet or outperform the engineering budgets set for each project.
  3. Communicate effectively – This role requires constant coordination; clear, concise, and proactive written and verbal communication is essential.

The Plumbing Design Engineer reports to David Jacques, Senior Engineering Manager, and is part of a collaborative team driving a variety of projects and initiatives that support our growing business. This highly visible role offers the opportunity to interact with stakeholders across all levels and functions within the organization.


We’re looking for someone who has:

  • Proven experience in designing, calculating, selecting equipment, and laying out Plumbing systems.
  • Strong proficiency with Revit, AutoCAD, and Bluebeam Revu.
  • Bachelor of Science in Engineering (or equivalent).

And everyone you work with should describe you as…

  • Dependable with tracking project deliverables, thoroughly checking work, finishing assignments, and meeting deadlines.
  • Having strong accountability.
  • Collaborative, strong communicator and great team player.
  • Surrounding yourself with people and projects that will challenge you to grow Empowering yourself to learn how to do something. If you need a ton of handholding or a micro-manager boss, this is not the place for you
  • Working in a lean, results-oriented environment, where you’ll be expected to do more, take on more, and achieve more every year
  • Having fun in an environment high on transparency, open to innovative new approaches with a supportive family feel

You should be motivated by…

  • Collaborating with a highly-skilled engineering team and taking pride in delivering plumbing solutions that exceed client expectations.
  • Continuously learning and expanding your expertise in plumbing design and engineering best practices.
  • Thriving in an environment that values autonomy- if you need constant handholding or a micro-managing boss, this isn’t the place for you.
  • Contributing in a lean, results-oriented workplace where efficiency and quality go hand in hand.
  • Enjoying a team-oriented culture where collaboration and camaraderie are encouraged, while also excelling independently on your projects.

Compensation: 

  • Plumbing Design Engineer (0–5 years of experience): $90,000 – $120,000 annually
  • Plumbing Design Engineer (5–10 years of experience): $120,000 – $140,000 annually

MacDonald-Miller Facility Solutions presently provides employee coverage for:

  • Medical, dental, vision for employees (coverage available for dependents for shared premium).
  • 401k retirement plan including Company matching.
  • Vacation and Sick Compensation (PTO), and Holiday Pay!
  • Disability income protection including short term and long term disability.
  • Employee and dependent life insurance.
  • Wellness Program.
  • Employee Assistance Program.

Where you will work

Our Seattle HQ office (17930 International Blvd, SeaTac, WA 98188) has easy access to the SeaTac International Airport, ample secured parking, and newly renovated office facilities - not to mention great views! Neighborhood amenities include an onsite deli, restaurants, and convenient freeway/airport access.   

Interested in learning more?

If you’re ready for an adventure and are interested in being considered for this role, click apply to start the conversation! Or if you know someone who currently works at MacDonald-Miller, reach out to them to get introduced to the team!

MacDonald-Miller Facility Solutions is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.

Average salary estimate

$115000 / YEARLY (est.)
min
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$90000K
$140000K

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Founded in 1965, MacDonald-Miller Facility Solution functions as a full-service, design-build mechanical contractor in the Pacific Northwest

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Full-time, onsite
DATE POSTED
October 5, 2025
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