Sr. Manager, SIOP (Demand Planning Transformation)

Lennox International•Richardson, TX

5d•$139,200 - $182,700•Hybrid

About The Position

Lead the Demand Planning transformation initiative within SAP IBP, driving process standardization, forecast accuracy improvements, and adoption of advanced planning and AI-enabled forecasting capabilities across the organization. Partner with business leaders, Supply Chain, Sales, Marketing, Finance, and IT teams to design, implement, and sustain best-in-class demand planning processes that improve forecast reliability, inventory productivity, service levels, and business performance. This role will serve as the primary owner for Demand Planning process design, SAP IBP optimization, forecasting strategy, governance, analytics, and change management within an Integrated Business Planning (IBP) environment. The successful candidate will leverage statistical forecasting, machine learning, AI-driven demand sensing, and predictive analytics to enhance forecast accuracy, identify demand risks and opportunities, and support data-driven decision-making. Combining strong planning expertise, SAP IBP knowledge, advanced analytics skills, and cross-functional leadership, this individual will drive digital transformation and deliver measurable business value through continuous improvement and intelligent planning capabilities. The Sr. Manager, SIOP for the Lennox Residential HVAC business leads the end-to-end process that aligns sales forecasts, inventory, and production capacity to optimize inventory levels, meet customer demand, and drive operational efficiency. This cross-functional role balances demand and supply, ensuring the organization operates on a unified plan. This role reports to the Home Comfort Solutions SIOP team and works closely with the LRH Leadership Team.

Requirements

Bachelor's degree in Supply Chain, Operations, Business, or related field; MBA/advanced degree preferred.
5–10 years in SIOP/S&OP, integrated demand-supply planning, and inventory optimization roles.
Proficiency with ERP/MRP systems (e.g., SAP, APO, IBP), advanced Excel, statistical forecasting, and analytics tools.
Strong understanding of demand planning, capacity modeling, inventory management, and network optimization.
Capable of dissecting forecasts vs. actuals, developing simulations, and formulating cost-effective strategies.
Ability to lead and influence across functions, manage multi-stakeholder meetings, foster consensus, and guide change initiatives.
Strong interpersonal and organizational skills
Strategic and tactical thinking
Facilitator mindset with comfort moderating complex discussions.

Nice To Haves

MBA/advanced degree preferred.

Responsibilities

Lead and execute the SIOP process: Facilitate monthly cycles including demand review, supply planning, and executive consensus meetings.
Demand & inventory planning: Generate and monitor forecasts, adjust safety stocks, and evaluate forecast performance.
Supply alignment: Assess production and purchasing needs based on demand, adjusting schedules and material availability accordingly.
Cross-functional collaboration: Work closely with sales, marketing, production, purchasing, and finance to ensure forecasts and operational plans are accurate and aligned.
Meeting facilitation & coordination: Lead SIOP meetings, manage agendas, document action items, and ensure follow-through across functions.
Data integrity & reporting: Maintain accurate data within ERP/MRP systems, track KPIs (forecast accuracy, inventory levels, on-time delivery), and drive continuous process improvement.
Change agent: Champion process standardization, system enhancements, and operational improvements.