Senior Manager, Customer Supply Chain Manager - Walmart , NY ; Bentonville, AR

Senior Manager, Customer Supply Chain Manager - Walmart

New York, NY ;
Bentonville, AR

About Mammoth Brands

Mammoth Brands (formerly Harry’s Inc.) is the modern CPG company behind brands Harry’s, Flamingo, Lume, Mando, and Coterie. We’re building a new model—and home—brands, founders, and talent looking to solve unmet needs, improve peoples’ lives, and ultimately challenge the status quo. Our mission is to “Create Things People Like More.” Simply put: everything we do should be better than what already exists.

If it’s not, we don’t do it. This guides everything we do, from developing the best product experiences, to making Mammoth Brands a great place to work, to exploring innovative ways to give back to our community.

We got our start in 2013 when our co-founders created Harry's. They built the brand differently—online first, prioritizing direct relationships with customers—and in the process learned they’d created something bigger: a playbook and platform that could help other brands grow and scale to their full potential, and a vision to reimagine consumer packaged goods. Today, Mammoth Brands is a growing portfolio of brands and the largest CPG company built in the last 20 years.

Even as we grow, we take extra care to maintain the small, scrappy, entrepreneurial culture that helped to get us where we are today: to create a company that people like more, that better serves its customers, employees, and community. As a company, we’re also committed to making a positive impact and have donated over $20 million through our network of nonprofit partners to date.

The Customer Supply Chain (CSC) team sits within the broader Supply Chain organization and is directly embedded with our Retail partners. As part of Mammoth Brands, we support the end-to-end execution of Harry’s, Flamingo, Lume, and Mando across key retailers.

As the Sr Manager for Walmart, you will own retail operations, forecasting, replenishment, and in-store execution from shelf to supply node. You will be accountable for ensuring best-in-class availability, in-stocks, OTIF performance, and flawless execution for Walmart’s omni-channel business. While this role is primarily Walmart-focused, there may be periodic support across other retailers depending on business needs.

We’re seeking an analytical, collaborative, and execution-obsessed Customer Supply Chain Manager to lead end-to-end supply chain operations for Walmart. This is a high-impact, customer-facing role responsible for CPFR, operational performance management, chargeback mitigation, and partnership with Walmart’s replenishment and supply chain teams.

You will work cross-functionally with Commercial leaders, Demand Planning, Supply Planning, Operations, Finance, and third-party partners to ensure products flow seamlessly through Walmart’s supply chain and onto shelves and digital carts. This role requires strong problem-solving, prioritization, and the ability to convert data into actionable insights and proactive recommendations.

We’re looking for a strategic thinker who can also roll up their sleeves, move quickly, and manage both day-to-day operations and long-term improvements.

• Lead Walmart forecasting & replenishment across all Mammoth Brands (Harry’s, Flamingo, Lume, Mando).
• Manage weekly CPFR processes, ensuring accurate internal inputs and alignment with Walmart’s Supply Plan.
• Conduct weekly replenishment analyses to monitor store inventory health, supply flow, and demand shifts.
• Own Event Management forecasting (promotions, resets, modular changes), new item launches, and end-of-life transitions.
• Identify risks and opportunities related to in-stocks, waste, overstocks, and seasonal dynamics.

• Serve as the go-to expert on Walmart operational processes including fulfillment, warehousing, transportation, in-store operations, modular execution, allowances, and chargebacks.
• Own OTIF and operational KPI tracking for Walmart; analyze root causes and lead corrective actions.
• Manage chargeback mitigation and recovery through cross-functional collaboration and retailer insights.
• Coordinate with Store Operations…