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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 over 1,600 employees across 13 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 install 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
• Energy and 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 taking 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

Service Accounting Supervisor: This is where you come in.

We are seeking a proactive Service Accounting Supervisor who thrives on process excellence, enjoys mentoring and developing team members, and is driven to enhance financial accuracy in a fast-paced service environment.

This role goes beyond supervision. It is an opportunity to elevate a team, optimize the billing lifecycle, and shape the way our service division operates.

This role will serve as the day-to-day operational leader for the service billing function, overseeing a team of billing specialists and ensuring work moves efficiently from service completion through invoicing and financial reporting.

Top 5 Deliverables in Your First Year to Be a Hero

1. Drive Operational Excellence

• Champion consistent billing practices, standardized procedures, and continuous improvement initiatives.
• Ensure service demand calls are closed on time each month and proactively remove delays or barriers.
• Monitor weekly call activity and help the team reduce aging unbilled completed calls (WIP).
• Actively investigate billing delays, process breakdowns, and customer invoicing issues to ensure work is moving through the billing lifecycle efficiently.
• Partner with operations and Area Operations Managers to identify opportunities to streamline billing workflows and improve turnaround time.

2. Deliver Accurate, Insightful Financials

• Review general ledger (GL) activity and correct misapplied costs to maintain financial accuracy.
• Confirm demand batches are posted promptly and correctly for month end close.
• Lead coordination for Lean initiatives, audits, and process documentation improvements.
• Investigate month end variances and work with internal partners to determine root causes and ensure accurate financial reporting.
• Support the team in identifying and resolving discrepancies between service activity, billing records, and financial reports.

3. Lead, Coach & Elevate Your Team

• Provide daily guidance, mentorship, and structure to accounting specialists.
• Host team huddles, monthly meetings, and one on one check ins to keep the team aligned and engaged.
• Foster a positive, accountable, and growth focused work environment.
• Escalate issues effectively while promoting problem solving and ownership.
• Develop clear process flowcharts and optimize team procedures.
• Provide leadership to a team of billing specialists, ensuring clear expectations, accountability, and consistent execution of billing processes across zones and customer accounts.

4. Be a Cross-Functional Partner

• Serve as a key contact for Area Operations Managers (AOM), operations teams, management, and internal partners.
• Conduct quarterly AOM check ins to ensure strong communication and alignment.
• Support inquiries from internal stakeholders and external customers as needed.
• Collaborate with AOMs and customers to resolve billing challenges, improve invoicing workflows, and establish clearer processes for obtaining customer purchase orders.

5. Execute High-Value Reporting & Business Support

• Deliver weekly, monthly, and ad hoc reports with clarity and accuracy.
• Assist with special projects, audits, and initiatives that strengthen operational performance.
• Support analysis of billing performance metrics, aging WIP, and reporting trends to help leadership identify opportunities for improvement.

Your Background: What Kind of Person Will Thrive in This Role

You should have:

• Previous billing experience is required. Accounting experience is strongly preferred.
• Experience supervising or leading a team in a fast-paced environment.
• Familiarity with accounting software systems. Experience in service, construction, or project-based industries is a plus.
• Comfort navigating customer portals such as Corrigo, Ariba, Service Channel, or Vendor Café.
• Advanced proficiency with Excel, Outlook, and other Microsoft Office tools.
• Experience improving operational processes or building workflow documentation.
• Experience investigating financial discrepancies or supporting month end reporting.

People should describe you as:

• A strong communicator who collaborates effectively with plant managers, engineers, and maintenance supervisors.
• Fast and accurate with ten keys, capable of typing 30 plus WPM.
• Detail oriented, managing project scopes, timelines, forecasting, and customer expectations with precision.
• Confident and proactive, able to guide teams through operational challenges and navigate difficult conversations when necessary.

You should be motivated by:

• Solving operational challenges that improve reliability, efficiency, and financial accuracy.
• Working in a results driven environment where initiative, accountability, and follow through are recognized and rewarded.
• Creating clear processes that help teams work more efficiently and reduce operational friction.

Benefits

Compensation: $37/hr to $48/hr

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 Headquarters, located at 17930 International Blvd, SeaTac, WA 98188, offers easy access to the Seattle-Tacoma International Airport, ample secured parking, and newly renovated office facilities — not to mention great views!

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.