Principal Supply Planner

Flexcon Company•Spencer, MA

3d•Hybrid

About The Position

The Principal Supply Planner is responsible for developing and maintaining short- and long-term supply and production plans aligned with demand and the Sales and Operations Planning (S&OP) process. This role involves running Master Production Scheduling (MPS) and Material Requirements Planning (MRP) processes, ensuring capacity feasibility, converting planned orders into production and purchase orders, and balancing production schedules across work centers. The Principal Supply Planner will also allocate inventory to support customer demand, monitor and adjust priorities based on supply constraints and business needs, and own the inventory strategy, including Make-to-Stock/Make-to-Order (MTS/MTO), safety stock, and decoupling points. They will establish and maintain inventory targets and planning parameters, monitor Finished Goods (FG), Work-In-Progress (WIP), and raw materials for risks, excess, or shortages, and support new product launches, transitions, and end-of-life planning. Additionally, this role performs capacity analysis, identifies constraints, recommends solutions, and runs scenario and what-if analyses to support decision-making. The Principal Supply Planner supports the Supply Review within the S&OP process, communicates risks and recovery plans, and identifies and addresses risks related to cost, service, quality, and capacity. They will also escalate critical issues with recommended actions, maintain planning master data and system parameters, ensure the accuracy and integrity of planning systems, and support continuous improvement in planning tools and processes. This role partners with Manufacturing, Procurement, Warehousing, Engineering, Finance, and Customer Service, translates supply plans into inventory and capacity impacts, supports KPI tracking and financial planning cycles, and participates in process improvement and standard work development.

Requirements

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)
Strong understanding of: 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

Responsibilities

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