SIOP Manager

Sales, Inventory & Operations Planning (SIOP) Manager

Salary: 50,000 - 55,000 per annum

Location: Sheffield
Contract: Permanent

The Role

We are seeking an experienced Sales, Inventory & Operations Planning (SIOP) Manager to play a critical role in balancing supply and demand across the business. This is a key, business-critical position responsible for translating sales demand into achievable operational plans, ensuring resources, materials and labour are aligned to deliver both current performance and long-term strategic objectives, you will be reporting to the Supply Chain Director. You will lead and manage one Project Management Officer who will support you in day to day activity.

Working cross-functionally, the SIOP Manager will lead the monthly SIOP process, oversee mid- to long-term load and capacity planning, and provide clear, data-driven insight to support decision-making at senior leadership level. This role suits someone analytical, detail-oriented and confident in influencing stakeholders across sales, operations and supply chain.

Key Responsibilities

• Balance business sales demand with available capacity, resources and labour
• Develop, lead and continuously improve the monthly SIOP process
• Analyse, interpret and maintain complex data sets to support planning decisions
• Partner with the Sales team to analyse demand and produce accurate sales forecasts
• Facilitate monthly load and capacity reviews, supporting operational leaders with resource improvement plans
• Collaborate with Purchasing to align material supply with forecasted demand
• Lead scenario planning activities and proactively resolve potential capacity or supply risks
• Ensure alignment between SIOP plans and weekly/monthly operational schedules
• Facilitate meetings relating to business strategy, SIOP and key projects
• Lead SIOP pre-meetings and Executive SIOP meetings with the Senior Leadership Team
• Document, communicate and track actions and outcomes from Executive SIOP meetings

The Successful Candidate

• Proven experience in Sales, Inventory & Operations Planning (SIOP or S&OP)
• Strong analytical capability with a high level of numerical competence
• Advanced Excel skills and confident use of PowerPoint for senior-level communication
• Excellent communication and stakeholder management skills
• Ability to build trust, influence effectively and challenge constructively when required
• Strong problem-solving skills with a proactive, solutions-focused mindset
• Solid understanding of medium to large manufacturing organisations
• Demonstrable experience in load and capacity management
• Experience using sales forecasting techniques to support operational planning

Desirable Experience

• Background in Supply Chain or related disciplines
• Understanding of Project Management principles
• Low Volume Manufacturing preferred but not essential

Why Apply?

This is a new formed high-impact role offering the opportunity to influence business performance at a strategic level while remaining closely connected to day-to-day operations. You'll be joining a collaborative environment where strong planning, insight and cross-functional working are critical to success.