Senior Merchandise Planner

Who We Are Thirdlove disrupted the lingerie industry by empowering women to find their perfect fit online with our innovative Fitting Room® quiz and is one of the original brands to operate 100% direct-to-consumer. All design and R&D is done in-house, and our extensive and complex supply chain is fully managed by our team. Inclusivity is at the core of who we are and how we serve our customers and build our teams. Traditionally, women were given a choice between two options when it came to their bras and underwear: Be sexy, or be comfortable. Our Cofounders: Heidi Zak and Ra’el Cohen, thought that was outdated too — so, in 2013, they created Thirdlove — a third, better option, which doesn’t force us to choose between being sexy or comfortable. What Our Team Embodies Our culture is collaborative, fast-paced, and data-driven, and we were most recently recognized with the Great Place to Work certification for the 5th year in a row. This recognition is given to a very small percentage of companies who apply for it and determined by employees’ real-time reports of their company culture. Earning this designation demonstrates to us that our team at Thirdlove is inspired by our mission, engaged in their everyday work, and enjoy partnering with our teammates and customers. If you want to impact millions of people, find your fit, and propel your career forward, we’d love to hear from you. What We Are Looking For The Senior Merchandise Planner drives demand forecasting and aligns tops-down/bottoms-up inventory plans for assigned ThirdLove product categories. They identify risks and opportunities, manage data and size curve integrity, and oversee SKUs and purchase orders. This role determines optimal investment levels across styles, sizes, and channels to hit sales and margin targets in an omnichannel environment. Responsibilities include aligning cross-functional plans and product-level forecasting/receipt plans. This role requires strong cross-functional partnership, high proficiency in data analysis, and the ability to clearly and succinctly present detailed sales and inventory insights. Key to success is using strategy, insights, and intuition to speak to data and influence diverse audiences. The ideal candidate has strong analysis skills, experience with forecasting systems and OTB processes, and channel experience in a growing and dynamic retail landscape. The Senior Merchandise Planner must be an excellent, proactive communicator, enthusiastic to learn, and detail/accuracy-oriented. They must ask questions, share knowledge, and thrive in a collaborative, fast-paced team environment. What You Will Own And How You Will Make A Difference Category & Product Planning: Forecast monthly sales/inventory incorporating bottoms-up trends and market insights. Execute action plans to align demand with inventory targets. Size Planning & Optimization: Analyze size-level selling across channels to optimize allocation, reduce stock issues, and update size curves based on historical and channel-specific data. Inventory Investments & Management: Formulate strategic initial and reorder buy recommendations to meet sales forecasts. Maximize inventory productivity and manage the entire inventory lifecycle for profitability. Business Insights & Performance Management : Analyze omnichannel selling to drive clear, executable action plans. Refine forecasting based on insights. Channel Expansion & Omnichannel Strategy: Establish annual/seasonal sales and inventory targets for existing and expanding channels. Tools & AI: Develop, optimize, and implement best-in-class processes and tools for omnichannel sales analysis, receipt planning, and dynamic inventory allocation to ensure a profitable customer experience. Who You Are 5-7 years in merchandise or demand planning for apparel/consumer goods; preferably intimates/numeric sizing. Expertise in omnichannel demand forecasting and OTB planning (e-commerce, retail, wholesale). Strong knowledge of demand planning to