Accounts Payable Supervisor
MacDonald-Miller Facility Solutions
Accounts Payable Supervisor
MacDonald-Miller Facility Solutions
Commercial building mechanical contractor
MacDonald-Miller Facility Solutions · Seattle, United States · Full-time · Posted 2026-09-12
Salary: USD 85,000–95,000
Workplace: on_site
Department: 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 1,600 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 executing with distinction. Our clients trust their toughest projects with our integrated teams, including:
People love to work at MacDonald-Miller, and it’s because we all share the same Core Culture Values:
We’re looking for an Accounts Payable Supervisor to lead our Accounts Payable team. This role is responsible for ensuring invoices are processed accurately and timely, vendor relationships are managed effectively, and AP processes continue to evolve as our business grows.
You’ll be both a hands-on leader and systems problem-solver—someone who can manage the day-to-day AP operation while identifying opportunities to improve workflows, leverage technology to support business growth and optimize operations -.
In return for achieving aggressive goals, you’ll get rewarded with more to own, a ton of growth opportunities, and more freedom than you’ve probably ever had.
Top deliverables in the first year to be a hero:
Leadership, management, and accountability — Lead, mentor, and develop the AP team while establishing clear expectations, priorities, and accountability.
Own the AP process — Ensure accurate and timely processing of vendor invoices, payment requests, and related transactions.
Process improvement — Continuously evaluate AP workflows and implement improvements that increase efficiency, accuracy, visibility, and scalability.
Cross-functional collaboration — Partner with Accounting, Procurement, Operations, IT, and other internal teams to resolve issues and improve financial processes.
Month-end close — Run and support the monthly A/P close to the general ledger, ensuring accuracy and timely completion.
Vendor management — Maintain strong vendor relationships and resolve invoice, payment, and account issues quickly and professionally.
Reporting and controls — Maintain accurate AP records, monitor key metrics, and ensure appropriate processes and controls are followed.
Training and support — Develop team members and serve as a go-to resource for AP processes.
The Accounts Payable Supervisor -role reports to the – Accounts Payable Manager and is part of a collaborative team working on a variety of projects and initiatives to support our growing business. This is a highly visible role that interacts with all levels and functions within the organization and will have the opportunity to make a meaningful impact on how we operate.
Your Background: What kind of person will thrive in this role?
You should have…
A track record of strong leadership and management skills, with the ability to mentor, develop, and motivate team members while effectively delegating responsibilities.
5+ years of Accounts Payable or related accounting experience, with supervisory or team leadership experience preferred.
Experience working with corporate credit card platforms and employee expense reimbursement and a strong interest in improving and optimizing system processes.
Experience in manufacturing, distribution, or a similar industry preferred.
Strong understanding of the full AP cycle, including invoice workflows, vendor management, and month-end close.
Bachelor’s degree in Accounting, Finance, Business Administration, or equivalent experience preferred.
Strong analytical, organizational, and problem-solving skills.
Comfort leveraging AI and automation tools to improve AP processes.
The ability to balance people leadership, daily execution, and systems/process improvement.
And everyone you work with should describe you as…
A forward thinker and problem solver who looks for better ways to get things done.
A consummate team player who works well across departments and is willing to jump in wherever needed.
Detail-oriented and able to work effectively in a fast-paced, ever-changing environment.
A strong communicator who can translate systems and process issues into practical solutions.
Someone who takes ownership and follows through without needing to be constantly reminded.
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.
Improving how things work. You’ll have the opportunity to influence processes, systems, and workflows rather than simply maintain the status quo.
Having fun in an environment high on transparency, open to innovative new approaches, with a supportive family feel.
Growing with the business. As we grow, your responsibilities and opportunities will grow with us.
Compensation - $85,000 to $95,000 Annually
MacDonald-Miller Facility Solutions presently provides employee coverage for:
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.
Apply at MacDonald-Miller Facility Solutions
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Commercial building mechanical contractor
MacDonald-Miller Facility Solutions operates as a Pacific Northwest commercial building mechanical contractor and facility-services company. It designs, builds, maintains, and optimizes HVAC, plumbing, controls, and related systems for complex buildings. In practice, engineering and construction teams work with fabrication, field trades, service technicians, controls specialists, and sustainability professionals. The profile is MacDonald-Miller Facility Solutions and its regional operating business. Roles span mechanical engineering, project management, skilled trades, service, controls, estimating, safety, sales, and support.
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