Remote Implementation Project Manager; ONESOURCE

Piper Companies is seeking an Implementation Project Manager to join a Professional Services team supporting the implementation of Thomson Reuters One Source solutions. . This role will lead cross-functional teams through complex software implementations for large enterprise clients, ensuring successful delivery of tax technology solutions. The ideal candidate will have experience managing multiple projects, ERP integrations, and a strong client advisory mindset.

This position will require up to 40% travel!

• Lead end-to-end implementation of ONESOURCE tax technology solutions for enterprise clients.
• Manage a portfolio of projects, including one large initiative, several mid-sized projects, and smaller engagements.
• Collaborate with client stakeholders to define scope, timelines, and deliverables.
• Integrate ONESOURCE with ERP systems such as SAP (preferred) or Oracle
  .
• Develop and maintain project budgets, timelines, and resource plans.
• Conduct scoping sessions and milestone reviews; ensure alignment with client objectives.
• Drive optimization and enhancements post-implementation, including new features and upgrades.
• Support change management initiatives and advise clients on workflow improvements.
• Identify opportunities for expanded engagement, including AI deployment reviews and SaaS integrations (e.g., Co-Counsel for legal).

• 5+ years of experience managing software implementation projects in enterprise environments.
• Strong background in ERP systems (
  SAP preferred
  , Oracle acceptable).
• Experience with tax technology or indirect taxation software (
  ONESOURCE experience is a plus
  ).
• Proven ability to lead techno-functional teams through complex integrations.
• Excellent communication and client-facing skills with a consultative approach.
• Strong budgeting and cost management experience.
• Bachelor’s degree in Business, Information Technology, or related field.
• Ability to travel up to 40%

• Familiarity with ONESOURCE or similar tax technology platforms (Avalara, Vertex).
• Experience in large-scale ERP integrations and global deployments.
• Change management and consulting experience.
• PMP certification or equivalent project management credentials.

• Join a global leader with a robust 2026 sales pipeline and thousands of projects in flight.
• Work on high-impact implementations with opportunities to advise on AI and SaaS integrations.
• Collaborative culture that values long-term commitment and professional growth.

• Salary: $150,000 – $190,000
• Full Benefits:
  Medical, Dental, Vision, 401k, PTO, and Paid Holidays

#LI-RL1 #LI-REMOTE

Implementation Project Manager, ERP Integration, SAP Project Manager, Oracle Project Manager, ONESOURCE Implementation, Tax Technology, Professional Services, Software Deployment, Techno-Functional PM, Enterprise Software, Project Budgeting, Client-Facing PM, Remote Project Manager, Global ERP Integration, Tax Compliance Software, Avalara, Vertex, SaaS Integration, AI Deployment, Change Management