Senior Planner

Location: Irvine, CA (Hybrid – 4 days in office)

Our Team:

We're dedicated to driving excellence in supply chain planning and revenue optimization for Semtech's high-growth Signal Integrity (SIP) business. Our team thrives on solving complex problems at the intersection of demand forecasting, capacity management, and strategic planning. We partner across the organization to turn data into actionable insights, balance competing priorities, and deliver solutions that protect revenue while optimizing inventory investment. If you're passionate about making an impact through analytical rigor, cross-functional collaboration, and innovative problem-solving, you'll thrive in this role.

Job Summary:

The Demand Planning Manager is responsible for managing demand forecasts, inventory, and coordinating with the supply planning team for the SIP business unit. This position requires strong analytical skills, cross-functional collaboration, and the ability to translate complex supply chain issues into clear business impact. The role manages critical relationships with partners in supply planning, engineering and product line managers, coordinates end-of-life planning for products, and supports revenue management activities to protect quarterly targets. This position requires deep knowledge of semiconductor manufacturing processes, capacity planning, and supply chain management.

Responsibilities:

Demand Planning & Forecasting

• Analyze consensus forecasts, sales inputs, and historical trends to validate demand assumptions

• Coordinate with Product Management to validate demand and product lifecycle forecasts

• Participate in S&OP planning processes, preparing analysis and recommendations for leadership

Supply Planning & Inventory Management

• Coordinate with foundry and supply planning partners on wafer releases, allocation, and delivery schedules

• Develop recommendations for material prebuilds, safety stock strategies, and buffer builds

• Monitor WIP inventory levels and Days of Inventory (DOI) targets

• Analyze slow-moving and excess inventory, developing disposition strategies

Product Lifecycle & EOL

• Lead end-of-life (EOL) planning activities including Last Time Buy (LTB) quantity calculations and Last Time Ship (LTS) planning

• Manage product lifecycle transitions (new product introductions, fab transfers, tester migrations)

Cross-Functional Collaboration

• Translate engineering and manufacturing issues into business impact language for executive communication

• Work with Sales and Operations teams on customer allocation decisions and urgent order prioritization

Systems & Data Management

• Maintain demand planning data in SAP APO and other planning systems

• Generate reports and analysis using Excel, SAP, and business intelligence tools

• Support system improvements and process automation initiatives

• Provide backup coverage for team operations including delinquency reporting and data uploads

Minimum Qualifications:

• Bachelor’s degree in Business, Supply Chain Management, Engineering, or related field

• 5+ years of experience in demand planning, supply chain planning, or operations planning

• Experience in semiconductor or high-tech electronics manufacturing environment

• Strong analytical skills with advanced Excel proficiency

• Experience with ERP/MRP systems (SAP preferred)

• Excellent written and verbal communication skills with ability to present complex information clearly

• Proven ability to work effectively across multiple functional teams and time zones

• Strong problem-solving skills and ability to make decisions with incomplete information

• Self-motivated with ability to manage multiple priorities in a fast-paced environment

Desired Qualifications

• APICS CPIM or CSCP certification

• Experience with semiconductor foundry and OSAT operations

• Knowledge of photonics or optical communications products

• Experience with SAP APO (Advanced Planning and Optimization)

• Familiarity with S&OP planning processes

• Experience managing product end-of-life transitions

• PowerPoint presentation skills for executive audiences

The intent of this job description is to describe the major duties and responsibilities performed by incumbents of this job. Incumbents may be required to perform job-related tasks other than those specifically included in this description.

All duties and responsibilities are essential job functions and requirements and are subject to possible modification to reasonably accommodate individuals with disabilities.

We may leverage Artificial Intelligence (AI) tools to enhance efficiency during candidate screening, assessment, and recruitment. Final hiring decisions remain with our Hiring Teams, not AI systems.

A reasonable estimate of the pay range for this position is $93,000 - $130,000.  There are several factors taken into consideration in determining base salary, including but not limited to: job-related qualifications, skills, education and experience, as well as job location and the value of other elements of an employee’s total compensation package.

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