Senior Demand and Supply Planner

PHINIA Inc.; Stonehouse; Hybrid; GBP 65,000 - 90,000; Full time

Benefits offered by this job

On-site parking

Canteen facilities

Discretionary bonus

Private healthcare

Pension scheme

Life assurance

Job summary

PHINIA Inc. in Stonehouse, Gloucestershire, is hiring a Senior Demand and Supply Planner to translate customer demand into achievable manufacturing and supply plans.

You will balance production capacity, inventory, and on-time delivery while working with SAP/ERP and cross-functional teams. You will lead S&OP and production planning, monitor capacity versus demand, drive improvements, and support new product launches.

Qualifications

• Minimum 3 years in Demand Planning, Supply Planning, Production Planning or S&OP.
• Experience in automotive or manufacturing supply chains is preferred.
• Degree and professional certifications are desirable.

Responsibilities

• Translate customer demand into achievable production and supply plans.
• Lead weekly S&OP and daily build-plan reviews with cross-functional teams.
• Monitor capacity vs. demand and drive recovery actions when needed.
• Maintain accurate MRP parameters and coordinate inventory planning.

Skills

Demand planning

Supply planning

Production planning

S&OP

SAP/ERP

Education

Degree in Supply Chain, Operations, Business or Engineering

APICS/CPIM/CSCP certification

Tools

SAP/ERP systems

Job description

Senior Demand and Supply PlannerPHINIA does not save or store the information you input until after you complete inputting the information and you consent and agree to submit the data.### Senior Demand and Supply PlannerApply: Stonehouse - United Kingdom: Full time: Posted Today: R2026-0532## **ABOUT US** **PHINIA:** Advancing sustainability today, powering a cleaner tomorrow. PHINIA is a diversified industrial supplier and global leader in the development of fuel systems, electrical systems, and aftermarket solutions, with a strong portfolio of trusted brands that includes DELPHI, DELCO REMY, and HARTRIDGETM. With over 100 years of manufacturing expertise and industry relationships, PHINIA has approximately 12,500 talented employees and over 40 locations in 20 countries and is headquartered in Auburn Hills, Michigan, USA. Read More**JOB PURPOSE**Reporting to the Head of Department, this senior level role is responsible for translating customer demand into an achievable manufacturing and supply plan, ensuring we deliver the right product, at the right time and in the right quantity, while balancing production capacity, inventory and operational efficiency.**KEY RESPONSIBILITIES*** To plan and coordinate production within the product line to ensure achievement of MPS targets taking advantage of the product line structure to drive efficiency in production planning.* To lead best practice production management of value stream bottlenecks to optimise production uptime and efficiency.* Proactively work to identify and mitigate production risks in the short term to minimise impact to the product line. **Demand & Customer Planning*** Ensure customer demand is accurately reflected within SAP/ERP.* Maintain customer scheduling agreements, orders and releases.* Monitor and resolve EDI errors and manage non-EDI customer releases.* Analyse customer demand variations and identify significant changes requiring escalation.* Translate changing customer requirements into updated production, inventory and dispatch plans.* Support customer planning activities for new product launches and product transitions. **S&OP and Production Planning and Scheduling*** Coordinate the site's S&OP process, bringing together Operations, Manufacturing Engineering, Industrial Engineering, Production Control, Supply Chain, Programme Management, Sales, HR and other key stakeholders.* Develop, maintain and communicate a rolling manufacturing, assembly and test build plans.* Translate customer demand into an achievable Master Production Schedule aligned with available capacity, materials and inventory.* Lead weekly and daily build-plan reviews with Operations.* Monitor short and long-term capacity versus demand, highlighting gaps and coordinating cross-functional recovery actions.* React quickly to demand variation and agree appropriate production and dispatch plans.* Identify bottlenecks and planning constraints and coordinate actions to maximise production uptime and efficiency.* Proactively identify short-term production risks and implement mitigation plans before customer delivery is affected.* Maintain relevant MRP parameters for manufactured parts and finished goods. **Inventory Management*** Monitor and optimise finished-goods inventory levels while protecting customer service.* Ensure SAP inventory remains accurate.* Review backflush transactions and investigate unusual inventory discrepancies.* Identify root causes of inventory inaccuracies and coordinate corrective actions.* Monitor blocked stock, negative inventory and other abnormal inventory conditions.* Coordinate excess and obsolete reporting and process* Balance inventory, customer requirements and production efficiency when developing manufacturing plans.* Lead and coordinate plant cycle counts and annual physical inventory counts. **Continuous Improvement & Problem Solving*** Monitor production adherence to schedule and respond quickly to abnormal conditions.* Use data to identify recurring planning, capacity and inventory issues and drive sustainable corrective actions.* Work cross-functionally to improve planning stability, inventory accuracy and customer delivery performance.* Support new-product launches and production cut-over planning.* Escalate risks early and ensure clear ownership and action plans are in place.* Ensure compliance with QMS and customer requirements* Support continuous improvement initiatives, e.g. Kaizen projects and Quarterly improvement projects, QCI / JFE. **Experience and Qualifications*** Minimum 3 years' experience in Demand Planning, Supply Planning, Production Planning or S&OP.* Experience within automotive manufacturing or Tier 1/Tier 2 automotive supply chain environments.Degree in Supply Chain, Operations, Business or Engineering.* Line management and experience of developing others* APICS/CPIM/ CSCP certification.* Lean, Six Sigma, RedX qualification. **Reward and Benefits**Reward package commensurate with role and experience including discretionary bonus, private healthcare and health cashplan, life assurance, contributory pension, on-site parking and subsidised canteen. **Location**On-site, Stonehouse Plant - Gloucestershire As proud Armed Forces Covenant Silver Award holders, we welcome applications from members of the Armed Forces community, recognising the valuable skills, experience and perspectives they bring to our workforce. **EQUAL EMPLOYMENT OPPORTUNITY** PHINIA is an equal employment opportunity employer such that all qualified applicants will receive consideration for employment without regard to race, color, age, religion, sex, sexual orientation, gender identity/expression, national origin, disability or protected veteran status. **VISA SPONSORSHIP** For this role, applicants must be currently authorized to work on a full-time basis in the country where the position is based. Only in certain circumstances, based on business need, does PHINIA provide sponsorship for employment visa status. **NO UNAUTHORIZED REFERRALS** PHINIA does not accept unsolicited resumes from recruitment agencies or third-party vendors. Any recruitment partnership must be approved in writing by Human Resources before candidate submissions are made.