Summer 2026 Internship - Accounting

At MacDonald-Miller Facility Solutions (“MacMiller”) we  make buildings work better . 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 15 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  executing with distinction . 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 Core Culture Values :

• Collaboration – 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.
• Dedication – We are dedicated to personal and professional excellence. We execute with distinction by doing the right thing and following through on our commitments.
• Safety – 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.
• Community – 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.
• Innovation – We are committed to continuous, creative problem solving . Innovation is how we stay an industry leader. We always strive to challenge and better ourselves.
• Fun! – 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.

Requirements

Accounting Intern : This is where you come in!

Top deliverables to be a hero :

• Learn as much as you can about accounting in the construction and mechanical contracting industry!
• Help your team! That could mean assisting with accounts payable and receivable, reconciling project costs, helping with month-end close, and supporting financial reporting for active jobs.
• Have a great time and learn if you’d like to consider a career at MMFS in the future, or if accounting / finance within a construction environment is for you!

The Interns report to one of our Senior Accountants on a collaborative team working on various projects and initiatives to support our growing business.

Your Background : What kind of person will thrive in this role?

You should have…

• An interest in accounting, finance, or business operations within a technical or construction environment
• A natural love of problem-solving, numbers, and learning how business decisions connect to financial outcomes
• An in-progress or completed bachelor's degree in accounting, Finance, Business Administration, or a related field

And everyone you work with should describe you as…

• Detail-oriented
• Very adaptable
• Positive with a can-do attitude
• A strong communicator

And you should be motivated by…

• 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

Benefits

Compensation : You will be paid $24 / hr for the duration of your internship.

MacDonald-Miller Facility Solutions presently provides Interns coverage for :

• Medical, dental, vision for employees (coverage available for dependents for shared premium)
• Paid Sick Leave, and Holiday Pay
• Wellness 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!

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.