Senior Manager, Demand Planning

This is a high-impact leadership role where you’ll shape enterprise-level demand planning strategy, influence executive decision-making, and directly improve forecast accuracy, inventory health, and service levels across a growing national organization.

About Prime Source Building Products

Prime Source Building Products is a leading national distributor of specialty building products with over 3,000 employees across North America. We serve residential and commercial construction markets through a broad portfolio of brands and locations, delivering innovative products, reliable supply chain solutions, and best-in-class customer service.

Prime Source is a growth-oriented organization, expanding through organic growth and strategic acquisitions. Our success is driven by operational excellence, disciplined execution, and a people-first culture that values collaboration, accountability, and continuous improvement.

• Benefits: Medical, dental, vision, 401(k) with company match, paid time off, and professional development opportunities

Position Summary

The Senior Manager, Demand Planning is responsible for deploying, leading, and continuously improving demand planning processes and systems that create a consolidated, enterprise-wide view of demand. This role integrates sales budgets, promotional plans, seasonality, pricing elasticity, and product lifecycle dynamics to optimize forecast accuracy, reduce bias, improve service and fill rates, and enhance inventory turns and working capital performance.

This position plays a critical leadership role within the Sales, Inventory, and Operations Planning (SIOP) process and partners closely with Sales, Marketing, Finance, Supply Planning, Sourcing, and Logistics.

Prime Source’s culture is guided by our Blueprint values. Leaders in this role are expected to model and reinforce these behaviors:

• Care – Put people first and act with integrity
• Winning Together – Collaborate across teams to achieve shared success
• Working Hard – Take ownership and deliver results
• Working Smart – Use data, systems, and insight to drive decisions
• Working Fast – Move with urgency in a dynamic environment

Key Responsibilities

• Develop demand management capabilities using statistical forecasting models based on product segmentation and lifecycle
• Lead and steward the demand planning process, including new product introductions, end-of-life transitions, and promotional demand changes
• Collaborate with Sales, Product Management, and Marketing to build consensus-based forecasts using statistical forecasts as the baseline
• Partner with Distribution Centers and internal customers on large orders, demand shifts, and local initiatives; analyze inventory and service impacts
• Lead, develop, and mentor a team of Demand Planners in best practices of demand and supply planning
• Enable manual and system-driven forecasting of seasonality, promotions, and product lifecycle events
• Serve as a core leader in the executive monthly SIOP review
• Ensure demand plan alignment across the portfolio to maximize revenue, margin, service levels, and inventory efficiency
• Run a monthly demand management cadence delivering a rolling 6-quarter outlook at company, customer, product line, and SKU levels with historical reference
• Integrate supply, sourcing, and logistics constraints into demand models
• Enable ERP systems to produce unconstrained and constrained demand models
• Converge demand and supply plans with Finance and Business Leaders to deliver a 6-quarter forward-looking revenue plan
• Leverage demand planning systems and analytics to continuously improve forecast accuracy and bias

Qualifications

Education

• Bachelor’s degree in Statistics, Business Analytics, Supply Chain, Inventory Management, Logistics, or related field
• Advanced degree preferred

Experience & Skills

• 8+ years of leadership experience in demand planning, supply planning, inventory management, or supply chain
• 8+ years of experience leading SIOP / S&OP processes
• Experience with demand planning and ERP systems including:
• SAP ECC, Oracle, or Microsoft Dynamics
• Expertise in forecast accuracy, bias analysis, and demand analytics
• Strong analytical, problem-solving, and decision-making skills
• Experience with analytics and visualization tools (Power BI, Tableau, SAP BOBJ)
• Professional certifications preferred (IBF, ASCM/APICS, CSCMP, ISM, IIBA)

Prime Source Building Products 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, age, disability, veteran status, or any other protected characteristic in accordance with applicable law.