We help premium consumer brands launch, grow, and operate on Walmart and Amazon by combining marketplace strategy, day-to-day management, and operational excellence.
We're an extension of your team so you can focus on building your brand.
Most brands don’t have the time or resources to build an in-house marketplace team.
Launching on Walmart, optimizing Amazon, managing inventory, protecting pricing, handling fulfillment, and monitoring performance all require specialized expertise and ongoing execution.
That’s why SJK exists.
We become your outsourced marketplace team, providing the strategy, systems, and day-to-day management needed to help brands grow profitably while protecting their reputation and customer experience.
From Selling Online to Building Marketplace Teams
SJK Enterprises began in 2014 when founder Sam Kirker started selling products online at 15 years old after discovering he was too young to get a traditional job. What started as selling items from garage sales and thrift stores quickly became a passion for eCommerce and the foundation of the company.
As the business grew, so did the complexity. Expanding from a basement operation into warehouse space taught us that successful marketplace businesses are built on repeatable systems, operational discipline, and continuous improvement.
Over the following decade, we developed the processes, technology, and operational expertise needed to manage inventory, fulfillment, catalogs, and marketplace performance at scale. In 2024, we expanded that experience to Walmart Marketplace, helping brands grow beyond a single sales channel.
Today, SJK partners with premium consumer brands as an outsourced marketplace team, combining strategy with execution to help businesses launch, grow, and operate profitably on Walmart and Amazon.
Recognized by Walmart
“With the help of WFS and Inventory Transfer Services, SJK Enterprises has sped up shipping, reduced fulfillment costs and scaled growth on Walmart.com.”
42x
more next day shipments
13%
lower fulfillment costs
97%
of orders fulfilled with WFS
Sam Kirker
Sam Kirker founded SJK Enterprises after discovering eCommerce at 15 years old.
Over the past decade, he has built the company from a small resale business into an outsourced marketplace team helping premium consumer brands succeed on Walmart and Amazon.
Known for bringing calm to complex marketplace operations, Sam combines marketplace strategy, operational excellence, repeatable systems, and data-driven decision making to help brands grow profitably while protecting their pricing, reputation, and customer experience.
Today, Sam works directly with brand partners to develop marketplace strategies, improve operational performance, and build long-term, profitable marketplace businesses.
Ready to Add a Marketplace Team?
Every successful partnership starts with a conversation.
We’ll learn about your business, answer your questions, and determine whether SJK is the right marketplace partner for your brand.