Supply Planning Manager

At IEM, we’re not just building innovative electrical distribution systems, we’re shaping the future. IEM is dedicated to delivering world‑class solutions for complex power needs. After 75 years, we continue to push the boundaries of what’s possible. Whether you’re an experienced professional or just starting out, you’ll have the opportunity to contribute, grow, and make a lasting impact on industries that power the world’s most dynamic markets. Position Summary: The Supply Planning Manager is responsible for owning and driving the enterprise supply plan, including rough‑cut capacity planning, as a core component of the company's Sales & Operations Planning (S&OP) cycle. This role serves as the primary liaison between the supply chain organization and plant Operations, ensuring supply plans are feasible, executable, and aligned to customer demand. Key Responsibilities: Develop and maintain the enterprise supply plan, translating the consensus demand plan into a feasible production and supply strategy through rough‑cut capacity planning (RCCP). Lead the supply review process within the monthly S&OP cycle, presenting supply constraints, risks, and recommended mitigations to senior leadership. Serve as the primary point of contact for plant Operations teams on supply plan requirements, capacity utilization, and schedule feasibility. Provide dotted‑line oversight and direction to plant Master Schedulers, ensuring alignment between enterprise supply plans and facility‑level Master Production Schedules (MPS). Identify supply/demand imbalances and capacity constraints; develop and communicate resolution scenarios and trade‑off analyses. Collaborate with Demand Planning to ensure supply plans reflect the latest consensus forecast and support agreed service level targets. Work with Procurement and Materials teams to align supply plans with material availability and lead time constraints. Maintain and improve supply planning tools, capacity models, and ERP‑based planning parameters, partner with the Planning Systems Manager on system enhancements. Develop and monitor key supply planning KPIs including schedule attainment, capacity utilization, and inventory performance. Lead a team of supply planners to optimize inventory levels, improve forecast accuracy, and ensure seamless product availability. Perform other duties as assigned by supervisor. Competencies: Systems Thinking: Ability to understand and balance enterprise‑level supply constraints across multiple facilities and product lines. Collaboration & Communication: Strong interpersonal skills to align Operations, Procurement, and cross‑functional teams on supply plan execution. Analytical Thinking: Proficiency in capacity modeling, scenario analysis, and data‑driven decision making. Attention to Detail: Ability to manage and reconcile complex planning data across multiple horizons and facilities. Leadership: Capability to influence and align dotted‑line reports and operational stakeholders without direct authority. Adaptability: Ability to respond quickly to supply disruptions, demand changes, and shifting operational priorities. Qualifications: Bachelor's degree in Supply Chain Management, Industrial Engineering, Operations, or a related field required. Minimum 5 years of experience in supply planning, master scheduling, or S&OP within a manufacturing environment. Demonstrated experience with rough‑cut capacity planning and MPS development. Experience providing cross‑functional or dotted‑line leadership to scheduling or planning personnel preferred. Proficiency with ERP systems required; INFOR/SyteLine experience highly preferred. Experience with BI tools (e.g., Power BI, Tableau) required for KPI tracking and reporting. APICS CPIM or CSCP certification preferred. Advanced proficiency in Microsoft Excel and capacity modeling tools. ASCM CPIM certification preferred. Demonstrated career ambition with a track record of growth and increasing responsibility; highly promotable with the potential to take on broader leadership roles within a fast‑paced, high‑growth organization. Compensation actually offered for this role will take into account internal equity and also may vary depending on the candidate's geographic region, job‑related knowledge, skills, and experience among other factors. A bonus and/or long‑term incentive units may be provided as part of the compensation package, in addition to the full range of medical, financial, and/or other benefits, dependent on the level and position offered. [FRE Compensation Range: $145,565 – 177,980 USD] Why Join IEM At IEM, you’ll join a team that powers some of the world’s most ambitious projects. We’re engineers, makers, and problem‑solvers who thrive on tackling complex challenges and delivering solutions that keep industries moving forward. If you’re driven, collaborative, and ready to make an impact, we’d love to hear from you. Your creativity and passion can help us achieve great things—come be part of the journey. Learn more about IEM at We offer comprehensive and competitive benefits package designed to support our employees' well‑being, growth, and long‑term success. View a snapshot of our benefits at Recruiting Scams Beware of recruiting scams. IEM never charges candidates fees, and all recruiter emails come from an @iemfg.com address. If you suspect fraudulent activity, do not share personal information and report it to us at iemfg.com/contact Non‑Discrimination Statement IEM does not discriminate against any applicant based on any characteristic protected by law. 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