Merchandising Planner

Merchandising Planner

Hertfordshire, 3 days a week

£40,000

This role will be responsible for optimising stock levels across a defined group of categories for a large, high-volume eCommerce retailer. You'll own stock holding, availability, and warehouse space utilisation across a portfolio of suppliers.

Working closely with the Buying team and supported by senior planning leadership, you'll make sure sales-weighted availability is at the right level to drive revenue, hit key KPIs, and improve warehouse efficiency.

• Build long-term stock plans for both new and core lines, aligned with sales budgets, financial targets, and promo plans.
• Partner with Buying to drive KPIs such as sales, margin, basket size, and stock efficiency.
• Prepare clear KPI reporting with practical, actionable insights.
• Recommend products for exit based on rate of sale, aged stock, and supplier MOQs.
• Build strong, long-term partnerships from onboarding through to regular performance reviews.
• Manage new product launches against critical path timelines.
• Create and share medium- to long-term forecasts with suppliers.

• Experience in an Assistant or Junior Merchandiser / Planner role.
• Ideally from an eCommerce retail environment.
• Strong numerical and analytical skills, with confidence working with complex data.
• Commercially minded, with a good understanding of product mix, margin, basket metrics, and stock efficiency.
• Highly organised and comfortable juggling multiple priorities in a fast-paced environment.
• Proactive and comfortable driving change.
• Customer-led, with a strong focus on availability and improving the overall offer.

Sphere is an equal opportunities employer. We encourage applications regardless of ethnic origin, race, religious beliefs, age, disability, gender or sexual orientation, and any other protected status as required by applicable law.

If you require any adjustments or additional support during the recruitment process for any reason whatsoever, please let us know.