Meet the Staff of DealerGuy.com, McDonough Atlanta, GA, 678-688-5525

Jason Miller - The Dealerguy

Jason Miller – The Dealerguy
Thank you for stopping by Dealerguy.com! My name is Jason Miller, and I’m proud to be the owner and founder of Dealerguy, right here in the Ola community of McDonough, Georgia.

I grew up working in my family’s wholesale produce business at the State Farmers Market, where I learned lifelong lessons from my parents—cheaper isn’t always better, honesty and integrity matter, and being fair with people helps you sleep better at night. Those values still guide me today, and I still believe a handshake means something.

Before opening Dealerguy in February of 2009, I spent ten years at one of the largest Ford dealerships in the Southeast. During that time, I sold over 1,300 vehicles and served as a finance manager for five years. That experience taught me how to help people make smart financial decisions when buying a vehicle. Now, as a buy-here-pay-here dealer—the “bank,” as we like to say—I take that responsibility and those relationships personally.

My passion for helping people find dependable, affordable vehicles led me to start Dealerguy.com, and I’m proud of what it’s become: a trusted local dealership built on honesty, value, and community. After more than 28 years in the car business, I still love what I do—and I’m thankful to be part of such a great community here in Ola.

When I’m not at the dealership, you’ll probably find me on the golf course (though I’ll admit, I’m still better at selling cars). I’m also a big Atlanta sports fan—all of them. And if you know Atlanta sports, you know that means I always believe in the underdog. Even through the letdowns, you stick by your team—and that same loyalty is how I approach life and business.

Tiffany Ammons - General Manager

678-688-5525 - tiffany@dealerguy.com

Tiffany
Tiffany joined the Dealerguy team in July of 2013 after being one of our long-time customers. From day one, she’s been an essential part of what makes our dealership feel like family. Her upbeat personality and genuine care for people always make our customers feel right at home.

Before joining us, Tiffany spent thirteen years in the banking world, building her reputation for honesty, dependability, and great customer service. Born and raised in McDonough, she’s deeply rooted in the community and loves helping her neighbors find dependable vehicles that fit their lives and budgets.

Tiffany is happily married and the proud mom of two grown sons. She’s also a huge animal lover—she has four dogs, including Skeeter, her German Shorthaired Pointer, who joins her at work every day. Customers love seeing them together! Tiffany’s dedication and easygoing nature make her someone people instantly trust—she’s not your typical “salesperson,” and that’s exactly what makes her so good at what she does.

Cathy Miller - Boss of the Boss

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Cathy – The Real Boss Lady
Cathy has been part of Dealerguy from the very beginning—and honestly, she’s a big reason Dealerguy.com exists today. Her drive, motivation, and encouragement helped take us from a small office in Griffin with six cars to a thriving dealership in McDonough with over 50 vehicles on the lot.

With 26 years of experience in the auto industry, Cathy knows this business inside and out. She’s the perfect partner to brainstorm with, always offering smart ideas to help us grow and improve. Around here, we all know who really keeps things running—Cathy’s the real boss lady.

She’s also an incredible wife and mom to Jaci and Cason, balancing family and business with heart, patience, and humor. Married since October 13, 2012, she’s been my rock from day one—and there’s no Dealerguy without her.

Jaci Miller - Dealerguy's Princess

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Jaci – The Dealerguy Princess
Jaci officially became part of the Dealerguy team on August 28, 2013, and she’s been brightening up the place ever since! Her energy, creativity, and big personality bring tremendous joy to everyone around her.

Now in 7th grade (and growing up way too fast!), Jaci loves coming to work with her dad and getting involved in the dealership. She helps with marketing ideas, customer interactions, and even makes videos that our customers love. Her natural charm and enthusiasm make her a favorite around here—and she still knows how to “sell” her dad on just about anything!

Jaci also has a huge heart for animals and can often be found loving on our four-legged team members. She’s got a bright future ahead, and we couldn’t be prouder to have her as part of the Dealerguy family.

Cason Miller - Dealerguy's Main Man

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Cason – Future Dealerguy in Training
Cason officially joined the Dealerguy team on October 22, 2015, and he’s been keeping us smiling ever since. Now in 4th grade, Cason is the most free-spirited and caring kid you’ll ever meet. He’s always smiling, laughing, and looking for the next fun thing to do.

He loves coming to Dealerguy—though we think part of the reason might be that he gets a little extra iPad time without Mom limiting his screen time (we get it, buddy!). When he’s not playing games, he enjoys chatting with customers and learning the ropes from Dad.

Cason already says he wants to take over Dealerguy one day, so we’re calling him our “future boss in training.” With his kind heart, easygoing nature, and big smile, we think he’s well on his way.

Domino - Customer Relations Specialist

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Domino
Domino joined the Dealerguy family on September 19, 2024, and has quickly stolen everyone’s hearts. Adopted not long after we lost our beloved Tyco, Domino has been the perfect boy to help Jason’s family—and the entire team—heal.

He’s full of personality, always happy, and loves making new friends. While he doesn’t come to work every day, when he does, he takes his job as greeter very seriously! Customers love his energy and gentle nature.

Domino reminds us every day how special rescue dogs can be. We’re so thankful he’s part of the Dealerguy family.

Tyco (In Memory 2011-2024) - Customer Relations Manager

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In Loving Memory of Tyco
Tyco became part of the Dealerguy family on July 14, 2011, after being rescued from the Henry County pound. From that day forward, he was more than just a shop dog—he was family. Tyco was Dealerguy’s official greeter, loyal companion, and Jason’s best friend.

Everyone who met Tyco fell in love with him. He had a way of making every customer feel welcome, and many people stopped by just to see him. His tail wags, kind eyes, and calm spirit made our dealership feel a little more like home.

Tyco passed away on June 6, 2024, and we miss him every single day. He made us better—both as people and as a business—just by being part of our lives. His pawprints will always be a part of Dealerguy.