Senior Planner (6-Month Contract) | Dermstore

Life at THG Beauty 

We know that beauty isn’t one-size-fits-all. Our portfolio of leading retailers and iconic beauty brands caters to everyone, everywhere, empowering customers all over the world to look and feel fantastic.

By combining our portfolio of owned brands with a marketplace for over 1,300 third-party beauty brands through online retail sites LOOKFANTASTIC, Cult Beauty, and Dermstore, THG Beauty's ambition is to be the global digital partner of choice across the beauty industry, supporting the channel shift to online.

THG Beauty’s breadth of relationships is unique to the beauty market; it engages with brands as a retailer, a brand owner, and a product developer and manufacturer, making it the industry’s digital strategic leader. 

Why be a Senior Planner at THG Beauty? 

Dermstore is the premier destination for professional-grade skincare and clinical beauty, curated by experts and trusted by enthusiasts. Since its founding by a dermatologist, Dermstore has been a pioneer in the digital beauty space, offering a highly curated selection of the world’s most efficacious brands across skincare, hair care, and cosmetics. As a leader in prestige beauty e-commerce, we bridge the gap between clinical expertise and a premium shopping experience.

The Senior Planner is responsible for leading inventory strategy, open-to-buy (OTB) management, and demand forecasting across a high-volume premium skincare portfolio. Stepping in to cover a maternity leave during our peak holiday trading window, this leader will oversee stock portfolio management for major global brand partners to secure revenue targets and optimize vendor rebate structures. Additionally, this role provides vital technical guidance, mentorship, and support to junior and associate planners across the skincare division.

As Senior Planner, you’ll:  

• Replenish stock on a weekly basis and manage open-to-buy to agreed targets
• Forecast sales at SKU level using sales history, lost sales calculations, and future business plans to prepare order quantities and avoid out of stocks
• Maintain and update the WSSI, reporting on performance vs. plan on a weekly and monthly basis
• Identify best and worst sellers and adjust forecasts and intake plans accordingly
• Ensure high in-stock rate while managing EOM stock holding targets
• Report on aged and slow-moving lines and propose swap-out, markdown, or RTV solutions
• Order and allocate stock to multiple warehouses to ensure appropriate coverage and avoid split shipments
• Work directly with brand partners to align on intake schedules, shipment compliance, and lead times
• Support the planning and execution of key trading events including peak and holiday trade
• Provide data for management accounts and contribute to seasonal budget submissions
• Manage and develop the Assistant Planner, ensuring POs are raised and chased appropriately 

KPI's 

• Achieve average of 95% combined availability across brand portfolio
• Maintenance of correct weeks of supply
• Forecast accuracy
• Maintaining appropriate sales to stock ratio by category
• Aged stock profile
• Stock holding budget 

What skills and experience do I need for this role? 

• 5 or more years in planning or forecasting, retail or e-commerce environment 
• Replenishment and open-to-buy management experience 
• Experience managing or mentoring direct reports 
• Strong analytical skills and ability to demonstrate logical analysis to address business challenges 
• Expertise with Microsoft Excel; SQL knowledge a plus 
• Ability to filter and prioritize sources of information and identify emerging trends 
• Previous experience working cross functionally with all levels to complete projects 
• Flexible and amenable to changes in a fast-pace, high growth environment. Must be able to multi-task while accommodating changing priorities 
• Beauty or e-commerce retail experience a plus 
• Experience negotiating with external brand partners a plus 

What’s in it for me? 

• Salary: $90,000 to $100,000
• Type: 6-month fixed-term contract (July - January 2027)
• Hybrid Work Model - 3 days office/2 days home