Sr. Demand Planner

At Gentex Corporation, we’ve created an environment where great ideas and great people can thrive. Leveraging a history that spans over 130 years, Gentex is a global leader in personal protection and situational awareness solutions for defense forces, emergency responders, and industrial personnel operating in high performance environments. Join our multinational team of exceptional and dedicated employees around the world and work on challenging and rewarding projects, grow your skills, and advance your career all while making a positive difference in the lives of our customers.

Together, you and Gentex can build a career that’s uniquely yours.

The Senior Demand Planner is responsible for developing and maintaining demand forecasts, supporting inventory optimization initiatives, and leading business planning activities across a global network of product lines and business units.

This role serves as a key contributor to the monthly SIOP process and partners closely with Sales, Operations, Product Management, Customer Service, and Supply Chain teams to ensure alignment between demand, supply, inventory, and business objectives.

The ideal candidate combines strong analytical skills with practical manufacturing planning experience and can independently identify risks, opportunities, and recommendations to improve forecast accuracy, inventory performance, and customer service levels.

• Own demand forecasts for assigned product lines and business units.
• Analyze historical sales, bookings, backlog, customer demand signals, and market trends.
• Identify forecast risks and opportunities and recommend corrective actions.
• Support monthly Demand Review, Supply Review, and SIOP processes.
• Monitor inventory performance including safety stock, reorder points, max levels, DOS, and inventory turns.
• Recommend inventory planning parameter changes to improve service and reduce excess inventory.
• Evaluate demand plans against manufacturing and supply chain constraints.
• Partner with Operations to understand capacity limitations and inventory impacts.
• Support annual budgeting, projections, and long-range planning activities.
• Develop inventory and forecasting analyses to support business decisions.
• Monitor forecast accuracy, bias, service levels, and inventory metrics.
• Participate in continuous improvement initiatives related to planning processes and ERP systems.
• Prepare executive-level summaries and recommendations for leadership review.

Bachelor’s degree in supply chain, Business, Operations Management, Supply Chain, or related field.

• 7+ years of experience in Demand Planning, Supply Planning, Inventory Planning, SIOP, or Supply Chain Management relation environments.
• Experience leading and supporting cross-functional initiatives.
• Proven ability to manage multiple projects and business priorities.
• Manufacturing planning experience required.
• Experience utilizing ERP systems, preferably SAP, to support planning, inventory, and business processes.
• Advanced Excel skills with the ability to analyze large data sets and develop actionable insights.
• Experience evaluating inventory strategies and planning parameters, including safety stock, reorder points, service levels, and inventory optimization initiatives.

• Strong analytical and problem-solving, and critical-thinking skills.
• Ability to independently develop recommendations and challenge assumptions.
• Excellent communication, presentation and facilitation skills with the ability to engage all levels of the organization.
• Strong project management skills with the ability to prioritize and execute multiple initiatives in a fast-paced environment.
• Ability to lead cross-functional discussions, influence stakeholders, and drive alignment toward business objections.
• Strong understanding of forecasting, inventory management, and supply chain planning concepts.
• Ability to build collaborative relationships and work effectively across multiple functions and leadership levels.
• Continuous improvement mindset with a focus on process standardization, business integration, and operational excellence.
• Proficiency with business…