Project Manager, ERP Implementation

MacDonald-Miller Facility Solutions • Seattle, WA

1d • Onsite

About The Position

MacDonald-Miller Facility Solutions (MacMiller) is seeking an experienced Project Manager to lead their Dynamics 365 Finance & Supply Chain (F&SC) implementation. This is a critical, high-visibility role on a transformational program that will replace the existing Great Plains/Wennsoft system and modernize financial, project accounting, procurement, and supply chain operations for a 1,600-person commercial HVAC service and projects business. The role is a dedicated, full-time position from kickoff through hypercare, responsible for the internal project plan, managing the Business Process Owner (BPO) and Subject Matter Expert (SME) working cadence, holding the implementation partner accountable, co-preparing Steering Committee meetings, and driving the program forward. The Project Manager will collaborate with the Product Owner, Finance BPO, and functional SMEs across various departments through all phases of the implementation methodology, including Joint Process Design (JPD), Conference Room Pilots (CRPs), data migration, User Acceptance Testing (UAT), and cutover. Close coordination with Project Managers for parallel SageHCM (payroll/HRIS) and BuildOps (field service) implementations is also required due to shared data, dependencies, and end-users.

Requirements

• 8+ years of project management experience.
• At least one full-cycle ERP implementation taken from discovery through go-live and stabilization as the customer-side PM.
• 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 relationship breakdown.
• 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 skills, with the ability to communicate effectively with executives, SMEs, and technical teams.
• PMP, PRINCE2, or equivalent project management credential, or comparable demonstrated experience.

Nice To Haves

• 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.
• 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).
• 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.

Responsibilities

• Build and maintain the internal project plan that mirrors and complements the implementation partner's plan.
• Run the weekly cadence with BPOs and SMEs, manage the RAID log, and co-prepare and co-present materials at monthly Steering Committee reviews.
• Drive accountability and delivery, manage scope, schedule, budget, risks, issues, communications, and change control.
• Hold the implementation partner accountable to their commitments without damaging the relationship.
• Ensure the right people from Finance, Project Accounting, AR, AP, Payroll, Supply Chain, Service Operations, and Project Operations are prepared for design sessions, configuration reviews, and UAT.
• Protect SME and BPO time, sequence their work, and unblock them when they encounter issues.
• Partner closely with the BuildOps PM and the SageHCM PM to align timelines, surface integration dependencies early, and prevent conflicting decisions.
• Establish and run the integration governance forum across all three workstreams.
• Co-lead the data migration workstream, driving the cleanup, mapping, and validation of master data from GP/Wennsoft.
• Ensure mock conversions and cutover rehearsals happen on schedule.
• Work hand-in-hand with the OCM lead to sequence training, communications, and readiness activities into the plan.
• Translate technical milestones into actionable information for end users.
• Surface risks early, drive decisions to closure, and prevent scope creep.
• Frame trade-offs between scope, schedule, and cost for executives and recommend a path forward.
• Lead cutover planning and execution.
• Run the hypercare period after go-live and ensure a clean operational handoff to IT and the business.

Benefits

• 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).

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed