The Executive Edge. The Athlete’s Hustle. The Local Heart.

Your Strategic Partner in Upstate Real Estate.

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Meet Mark Constantino

Before entering real estate, Mark Constantino spent 20 years in executive leadership, leading organizations, negotiating high-stakes deals, and solving complex challenges under pressure. Today, as part of The Upstate Team at Keller Williams Greenville Central, he brings that same strategic mindset, strong work ethic, and people-first approach to every client he serves. As a former motivational speaker and published author, Mark has always been passionate about helping others reach their goals, and he now applies that experience to guiding buyers and sellers through some of life’s biggest decisions with clarity and confidence.

Mark approaches real estate with the same discipline that has carried him through marathons, Spartan Races, and Tough Mudders. He understands that buying or selling a home takes endurance, focus, and consistent follow-through from start to finish. A proud Simpsonville resident, Mark is deeply connected to the Upstate lifestyle and the community he serves. When you work with Mark, you’re getting more than an agent — you’re getting a strategic partner with executive-level experience, local insight, and a genuine commitment to helping you move forward with confidence.

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The Power of a Century:

Backed by The Upstate Team

When you work with Mark, you aren't just getting one agent; you are gaining the collective power of The Upstate Team at Keller Williams Greenville Central. In an industry where experience is the ultimate currency, our team is the gold standard. We aren't just a group of individuals; we are a specialized unit with over a century of combined real estate experience right here in South Carolina. (end of paragraph)

Led by Senior Partner Don Swearingen, who alone brings over 31 years of discipline as a builder, sales manager, and residential specialist, our team has seen every market cycle imaginable. We’ve closed thousands of transactions, navigated complex negotiations, and helped countless families find their footing in the Greenville market. Being a part of this team means Mark's clients benefit from a massive internal network, cutting-edge market data, and a deep-rooted reputation for integrity that spans decades. We don’t just "list" homes; we deploy a century’s worth of strategic insight to ensure your move is a win.

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Life in the Upstate:

Beyond the Boardroom

For Mark, being a Realtor in the Upstate isn't just a career—it’s about sharing the lifestyle that saved his soul. When he's not analyzing market trends or negotiating deals, you’ll find Mark living the same "Americana" dream he helps his clients discover. (end of paragraph)

You’ll likely see Mark driving through Simpsonville in his Jeep Wrangler with the top off, heading to Conestee Nature Preserve for a hike or catching his son, Leo, rounding the bases at Heritage Park. Mark believes in the "Executive Athlete" lifestyle, whether he's hitting a 7:00 AM workout at the YMCA in Verdae or preparing for his next Spartan Race. (end of paragraph) 

The Upstate is built on simple joys: a family trip to The Ice Cream Station in downtown Simpsonville (where the train whistle is the soundtrack to our Friday nights), a quiet dinner with Mark's wife at Bergamo in downtown Greenville, or a Sunday afternoon in his kitchen perfecting his famous Italian meatballs. This is more than a territory on a map to Mark; it’s the place where his children are growing up and where he's found his own "Liberty." Mark's not just selling houses here—he's selling the keys to the life you’ve been dreaming of.

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Meet Our Real Estate Team

The Faces Behind JM Realty Associates - Your Dedicated Real Estate Professionals.

What It’s Like to Work With Mark

Client Reviews

Hear from the people who trusted me to guide them through their real estate journey.

"I’ve known Mark for decades, and if there’s one thing I can say with absolute confidence, it’s that his work ethic and integrity are second to none. He’s the kind of person who genuinely cares about dRead MoreRead Less
"Mark Constantino is as genuine as they come. I have known him for decades now, and I can assure anyone who works with him, will be completely satisfied. He will take care of any needs and concerns youRead MoreRead Less
"Mark is the man. Very professional. Great stand up individual and family man. Only flaw is that he is a New York Yankees fan. But I guess we all can’t be perfect. Highly recommend doing business with Read MoreRead Less
"One of the absolute hardest working and dedicated individuals I have EVER known. Gets the job done and genuinely cares about the public he serves."
"I have worked with Mark for many years. He is a focused, high energy, results oriented, integrity driven human! Contact Mark for all of your real estate questions and concerns. He is the guy you can Read MoreRead Less
"Mark is a man of great character, wonderful personality, and a fantastic work ethic. You can trust him to find you the perfect home! I highly recommend him."