Implementation Manager Manager Jobs in Seattle, WA

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 one 1,600 employees across 14 offices, there's 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 to improve efficiency
• 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 projects in the built environment for private and public sector clients

People love to work at MacDonald-Miller 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

We're looking for an experienced Project Manager to lead MacDonald-Miller's Dynamics 365 Finance & Supply Chain (F&SC) implementation as our internal counterpart to our implementation partner. This is a high-visibility role on a transformational program that will replace our legacy Great Plains/Wennsoft environment and modernize how a 1,600-person commercial HVAC service and projects business runs its financials, project accounting, procurement, and supply chain.

You will own the customer side of an implementation running from mid-2026 through late 2027. The implementation partner's PM owns their delivery; you own ours - the people, the decisions, the data, and everything that has to come from MacDonald-Miller for the implementation to land on time and on budget. You'll also coordinate closely with the Project Managers leading our parallel SageHCM (payroll/HRIS) and BuildOps (field service) implementations, since the three programs share data, dependencies, and end users.

This is a dedicated, full-time role from kickoff through hypercare. As the ERP Project Manager, you will lead the day-to-day execution of the D365 F&SC implementation from MacDonald-Miller's side. You will manage the internal project plan, run the BPO and SME working cadence, hold the implementation partner accountable to their statement of work, co-prepare and co-present at Steering Committee meetings alongside the partner PM, and keep the program moving when decisions stall. You will work alongside our Product Owner, Finance BPO, and the functional SME teams across Finance, Project Accounting, AR, AP, Payroll, Supply Chain, and Operations through every phase of the methodology - Joint Process Design (JPD) sessions, Conference Room Pilots (CRPs), data migration iterations, UAT, and cutover.

• Project execution and governance. Build and maintain the internal project plan that mirrors and complements the implementation partner's. Run the weekly cadence with BPOs and SMEs, manage the RAID log, and co-prepare and co-present materials at monthly Steering Committee reviews alongside the partner PM. Drive accountability and delivery, manage scope, schedule, budget, risks, issues, communications, and change control. Hold the implementation partner accountable to their commitments without burning the relationship.
• SME and BPO orchestration. Make sure the right people from Finance, Project Accounting, AR, AP, Payroll, Supply Chain, Service Operations, and Project Operations show up prepared for design sessions, configuration reviews, and UAT. Protect their time, sequence their work, and unblock them when they're stuck.
• Cross-program coordination. Partner closely with the BuildOps PM and the SageHCM PM to align timelines, surface integration dependencies early, and prevent the three programs from making conflicting decisions. Establish and run the integration governance forum across all three workstreams.
• Data migration leadership. Co-lead the data migration workstream with our Data Migration BPO. Drive the cleanup, mapping, and validation of master data coming out of GP/Wennsoft - customers, vendors, items, jobs, GL, open AR/AP - and make sure mock conversions and cutover rehearsals happen on schedule.
• Change management partnership. Work hand-in-hand with our OCM lead to make sure training, communications, and readiness activities are sequenced into the plan - not bolted on at the end. Translate technical milestones into what end users actually need to know and do.
• Risk and decision management. Surface risks early, drive decisions to closure, and prevent scope creep from quietly inflating the budget. When trade-offs are needed between scope, schedule, and cost, frame them clearly for executives and recommend a path.
• Go-live and stabilization. Lead cutover planning and execution. Run the hypercare period after go-live and make sure the operational handoff to IT and the business is clean.

• 8+ years of project management experience, including at least one full-cycle ERP implementation taken from discovery through go-live and stabilization as the customer-side PM (not as the system integrator)
• Direct experience with Microsoft Dynamics 365 Finance & Supply Chain, Dynamics AX, or a comparable tier-one ERP (SAP, Oracle, NetSuite at scale)
• Demonstrated experience managing an external implementation partner - holding them accountable to scope, schedule, and quality without the relationship breaking down
• Strong working knowledge of core financial processes: GL, AR, AP, project accounting, procurement, fixed assets, and month-end close
• Experience leading or co-leading an ERP data migration effort, including cleanup, mapping, validation, and cutover
• Excellent written and verbal communication, with the ability to move fluidly between executive updates, SME working sessions, and technical design conversations
• PMP, PRINCE2, or equivalent project management credential, or comparable demonstrated experience

• Experience implementing D365 F&SC specifically with a major D365 implementation partner
• Industry experience in commercial HVAC, mechanical contracting, construction, or another field service-heavy trade contractor environment - enough to understand why a missed dispatch, a delayed invoice, or a broken job cost report is a serious problem
• Experience migrating off Microsoft Dynamics GP and/or Wennsoft (Signature/Job Cost/Service Management)
• Experience running a workstream alongside a parallel HRIS, payroll, or field service implementation, with shared integration dependencies
• Familiarity with integration concepts (REST/SOAP APIs, middleware, master data governance) - enough to pressure-test integration designs and catch hand-waving, even if you're not building them
• Experience with construction or project-based accounting (WIP, percentage-of-completion, job costing)
• Comfort using AI tools (Copilot, Claude, ChatGPT) to accelerate planning, documentation, status reporting, and analysis

Twelve months in, the D365 F&SC program is on schedule, on budget, and the Steering Committee trusts your read on where things actually stand. The BPOs and SMEs feel supported rather than overwhelmed. The implementation partner respects you as a counterpart who keeps them honest. The BuildOps and SageHCM PMs treat you as a partner, not a competitor for resources. And when go-live arrives in late 2027, the business is ready - because you made the readiness happen, not because everyone got lucky.

Benefits

Compensation: $150,000-$185,000 annually. This is a full-time, 24-month position. At the end of the term, the role will conclude and employment with MacDonald-Miller will end.

Benefits:
MacDonald-Miller Facility Solutions proudly provides comprehensive employee coverage, including:

• Medical, dental, and vision insurance (coverage available for dependents with shared premium).
• 401(k) retirement plan with company matching.
• Paid time off (vacation, sick time, and holidays).
• Disability income protection, including short-term and long-term disability.
• Employee and dependent life insurance.
• Wellness Program.
• Employee Assistance Program (EAP).

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

Interested in learning more?

If you're ready for an adventureand 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.