SIOP Manager (Demand Planning & Digital Integration)
About The Position
The SIOP Manager is responsible for building a world-class, data-driven Sales, Inventory & Operations Planning (SIOP) process by integrating direct demand signals from key customers and strategic distributors into the ERP planning system. Reporting to the Supply Chain leadership, this role serves as the business owner for the SIOP process and the Infor LN SIOP module implementation. Unlike a traditional demand planner focused on forecasting internally, this role will establish collaborative planning with customers, measure forecast accuracy and create a closed-loop continuous improvement process that increases visibility, inventory productivity, and service levels. The objective is to transform planning from internally generated forecasts into a collaborative, technology-enabled process supported by ERP automation and real-time demand intelligence.
Requirements
- Strong understanding of SIOP, demand planning, and supply chain processes.
- Experience implementing or administering ERP planning modules (Infor LN preferred; SAP, Oracle, or similar acceptable).
- Advanced analytical and statistical forecasting capabilities.
- Strong knowledge of inventory planning and replenishment principles.
- Experience building dashboards and KPIs using Excel, Power BI, or similar tools.
- Ability to translate business requirements into system enhancements with IT teams.
- Understanding of data integration and automated planning workflows.
- Process-oriented with a continuous improvement mindset.
- Strong project management and implementation skills.
- Ability to influence cross-functional teams without direct authority.
- Excellent communication and presentation skills.
- Customer-focused and collaborative.
- Data-driven decision maker who challenges assumptions with facts.
- Strong change management capabilities.
Nice To Haves
- 5+ years of experience in SIOP, Demand Planning, Supply Chain, or Integrated Business Planning.
- Experience implementing ERP planning modules or planning systems.
- Manufacturing environment experience preferred.
- Lean or Six Sigma experience is a plus.
- Experience collaborating directly with large customers or distributors on demand planning.
Responsibilities
- Lead the implementation and continuous improvement of the Infor LN SIOP module.
- Develop and maintain the monthly SIOP process across Sales, Supply Chain, Operations, and Finance.
- Establish direct demand planning collaboration with key customers and top distributors.
- Collect, validate, and integrate customer demand signals into the ERP planning system.
- Create a formal closed-loop process that measures forecast accuracy by customer and distributor and provides regular feedback to improve future planning.
- Develop dashboards and KPIs to monitor forecast accuracy, bias, inventory impact, and service performance.
- Partner with IT and ERP teams to implement enhancements, automation, and system improvements.
- Standardize planning assumptions, master data governance, and planning parameters.
- Identify gaps between customer forecasts and actual demand and drive corrective actions.
- Facilitate monthly SIOP meetings, including but not limited to Executive SIOP meeting, by presenting demand trends, risks, and recommended actions.
- Support inventory optimization by improving forecast quality and planning discipline.
- Work cross-functionally with Sales, Operations, Purchasing, Finance, and IT to improve planning capabilities.
- Lead continuous improvement initiatives that simplify processes and reduce manual work.
Benefits
- Medical, Dental, Vision, and Prescription Drug insurance plans
- Access to a Health Advocate who is an expert in Marmon’s health plan and can help you select the best health benefits for you and your family
- Tax advantaged spending accounts for health and dependent care expenses
- Wellness programs and resources including Telehealth, Mental Health, Fitness, and Family Planning
- Generous paid time off for personal use, holidays, and parental leave
- Company-sponsored life insurance
- 401(k) with fully vested company match; Marmon may also make an additional annual discretionary contribution to your account, whether or not you contribute on your own
- Financial and retirement advising
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What This Job Offers
Job Type
Full-time
Career Level
Manager
Education Level
No Education Listed
