About
JS Marketing

Driven by Purpose. Built for Results.

JS Marketing isn’t just a business - it’s a calling. We built this company in Barrie, serving all of Simcoe County, because we believe in something bigger than marketing. For us, it’s about making our community stronger and bringing people together, one business at a time.


We didn’t start JS Marketing to chase paychecks. We did it because we want to help great businesses and great people succeed, so they can serve their communities and leave their mark. We have a saying: “Good people first, Good business second.” That’s our commitment to making business a human endeavor. We know what it’s like to build something from the ground up—the grind, the doubts, the late nights. But we also know how powerful it is when you finally break through, when you get seen, become trusted, and start winning the right customers.


Our purpose is simple: leave the world better than we found it, starting right here at home. That means putting people first, building genuine relationships, and using marketing as a tool to lift others up—not just to sell more stuff.


At JS Marketing, our job is to set you up to win. We help you become the trusted choice in your market, attract high-quality customers, and build a reputation that stands the test of time.


We’re not just another service provider. We’re your growth partner. Our mission is to make it easier for you to get in front of the people who need what you offer, so you can spend more time building your business, serving your customers, and leaving your mark on the things that matter to you.


This is what we live for. It’s why we show up every day. Let’s build something that lasts together.

A man with a beard is wearing a blue shirt and smiling.

Jeff Gartner

Founder

I don’t waste my days. I’m here to build things that last—businesses, relationships, and a life worth living. As the visionary and founder behind JS Marketing, I bring years of hard-earned marketing expertise, but my real strength is how I think, learn, and lead—with humility, honesty, and relentless drive.


My philosophy is simple: work with integrity, keep a beginner’s mindset, do hard things, and serve others like it matters—because it does



I draw from years of reading, volunteering, and fighting for my own growth. Every client, every project, every conversation gets my full attention and effort.


If you work with me, you’re not just getting a marketer. You’re getting a partner who measures success by impact, not ego. I believe in playing this game of life with gratitude, courage, and meaning—and helping others do the same.


“Leave the world better than you found it. Live well, live bravely, and meet death with a smile.”

A man wearing a brown shirt and a green hat is standing with his arms crossed.

Sean Preston

Husband, Father, Human Connector, and Community Builder

I'm Sean. I recently married the love of my life, and I'm a proud Dad to an incredible 19-year-old daughter. At my core, I'm all about relationships. I believe business is personal, and there’s nothing more powerful than a real connection.


My passion for marketing comes from something deeper than stats and trends. I've seen how it can change lives. It helps business owners put their kids through school, reinvest in their dreams, and make a bigger impact in their communities. That kind of transformation means something to me, and it’s what drives me every day.


With years of experience under my belt, I feel like I’m in my prime. At 36, I bring the best of both worlds. I was raised with old-school values, but I’ve grown into the digital age with both feet planted. I’m a social guy who thrives on connection, and I believe in keeping things real.


When I'm not helping business owners grow, you’ll find me outside. I love golf in the summer, hockey in the winter, and anything that gets me on the water or around a fire. I’m a huge Toronto Maple Leafs fan and a true competitor at heart. If it involves a game — on the ice, on a field, a court, at the table, or on a screen — I’m in. I also love movies, comedy, and throwing in the perfect quote at the perfect time.


I live for relationships, community, and creating something that matters. I’m here to help, and I’d love to hear from you.

Our Core Values: What Drives Us

At JS Marketing, our work is rooted in values that guide every decision, project, and partnership. We believe in doing business the right way—through transparency, collaboration, and measurable impact. These core principles shape how we work and the success we create with every client:

  • Integrity – We’re honest, reliable, and accountable in everything we do.
  • Innovation – We stay ahead of trends to deliver forward-thinking strategies.
  • Collaboration – Your goals become our goals. We grow together.
  • Excellence – Our goal is not just to meet expectations, but to exceed them
  • Lead by Example – Everything we suggest to our clients, we have done or are currently doing. We lead from the front.

Where We Work: Our Service Areas

JS Marketing proudly serves businesses across Barrie and Simcoe County, ON and surrounding communities. We’re passionate about supporting local entrepreneurs and growing brands with smart, results-focused marketing. While based in Barrie, our services extend throughout Simcoe County and beyond—offering both in-person collaboration and remote solutions tailored to your location. No matter where you’re based, we’re here to help you grow.