Principal Supply Planner

The Principal Supply Planner is responsible for developing, managing, and continuously improving the end-to-end supply plan and supply strategy for assigned products, product families, or business units. This role translates demand forecasts into executable, capacity-feasible production and procurement plans while balancing customer service, inventory investment, and total supply chain cost.

The Principal Supply Planner owns planning policies, system planning parameters, and supply strategies, and serves as the primary supply planning lead within the S&OP and S&OE processes. This role is responsible for scenario planning, capacity and inventory modeling, supply risk management, and making recommendations to leadership regarding service, cost, and inventory trade-offs.

• Bachelor’s degree in Supply Chain, Operations, Engineering, Finance, Economics, Mathematics, or related field preferred
• ASCM/APICS certification (CPIM, CSCP) strongly preferred
• 5+ years of experience in supply planning, production planning, materials management, or manufacturing operations
• Deep hands-on experience with MRP, MPS, RCCP, and capacity planning
• ERP experience required (Oracle preferred)
• Advanced Excel and data analysis skills (modeling, scenario analysis, data visualization)

• Material Requirements Planning (MRP)
• Master Production Scheduling (MPS)
• Capacity Planning and Rough-Cut Capacity Planning
• Inventory Management and Inventory Policy
• Manufacturing processes and lead time structures
• Ability to perform scenario modeling and what-if analysis
• Strong financial and business acumen (inventory, cost, service trade-offs)
• Clear and confident communicator able to present recommendations to leadership
• High accountability and ownership mindset
• Strong organizational and time-management skills
• Ability to lead cross-functional discussions and drive decisions
• Detail-oriented with strong systems and process discipline
• Ability to thrive in a fast-paced, high-urgency environment

• Develop and maintain short- and long-term supply and production plans aligned with demand and S&OP
• Run MPS and MRP processes and ensure supply plans are capacity-feasible
• Convert planned orders into production and purchase orders as needed
• Balance production schedules across work centers
• Allocate inventory to support customer demand and service targets
• Monitor and adjust priorities based on supply constraints and business needs
• Own inventory strategy (MTS/MTO, safety stock, decoupling points)
• Establish and maintain inventory targets and planning parameters
• Monitor FG, WIP, and raw materials for risks, excess, or shortages
• Support new product launches, transitions, and end-of-life planning
• Perform rough-cut and detailed capacity analysis
• Identify capacity constraints and recommend solutions (overtime, outsourcing, schedule changes, inventory builds)
• Run scenario and what-if analysis to support decision-making
• Support Supply Review within S&OP process
• Provide supply constraints, risks, and scenario analysis to leadership
• Support S&OE execution and short-term adjustments
• Communicate risks and recovery plans to cross-functional teams
• Identify and address risks related to cost, service, quality, and capacity
• Develop mitigation and recovery plans for supply disruptions
• Escalate critical issues with recommended actions
• Maintain planning master data and system parameters
• Ensure accuracy and integrity of planning systems
• Support continuous improvement in planning tools and processes
• Partner with Manufacturing, Procurement, Warehousing, Engineering, Finance, and Customer Service
• Translate supply plans into inventory and capacity impacts
• Support KPI tracking and financial planning cycles
• Participate in process improvement and standard work development
• Category:
  Hybrid (minimum of 3 days on site in Spencer, MA)

At Flexcon, we offer a comprehensive compensation and benefits package that includes base salary, healthcare coverage (medical, dental, and vision), life and disability insurance, 401(k) with company match, paid time off, wellness programs, and tuition assistance. Based on region, the expected salary range(s) for this in-person position in Massachusetts is $89,110.69-$.

The posted salary range is intended to provide a general idea of compensation. Actual compensation may vary depending on location, experience, and other job-related factors. We take regional market differences into consideration to ensure fair and competitive pay in each area.

Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities

This employer is required to notify all applicants of their rights pursuant to federal employment laws. For further information, please review the Know Your Rights notice from the Department of Labor.