Greg Holthaus

About Greg Holthaus

Greg Holthaus didn't stumble into real estate — he was called to it. At just 11 years old he knew this was his path, and by age 13 he was studying alongside his first mentor, learning contracts, shadowing deals, and building the foundation of a career that would span three decades and touch every corner of the industry.

His first investment property came in 2003. Since then Greg has owned and operated over 200 rental units and managed more than 750 units through S.I. Property Management, the property management company he founded alongside his real estate brokerage. His portfolio spans residential, multifamily, commercial, and new construction — the full range of what Southern Illinois real estate has to offer.

In 2010, Greg founded Southern Illinois Realty Experts — building the region's most recognized real estate brand from the ground up. As Designated Managing Broker, he oversees all three SIRE office locations and leads a team of 23+ licensed brokers. Across a career spanning more than 25 years as an investor, owner, and REALTOR® (licensed since 2009), Greg has helped close over 10,000 transactions.

Greg also built SIRE into Southern Illinois' true one-stop shop: in-house mortgage with Jarrod Sanders, CCM, title services with Jessica Gaudette at Stratera Title, and full-service property management through S.I. Property Management (sirentnow.com) — 750 rental units under management. Buy it, finance it, close it, rent it — all under one roof.

That same vision powers SIRE's lead engine. Through the exclusive Market VIP partnership with Realtor.com® covering 15 Southern Illinois zip codes, plus the company's own website, SIRE generates more than 4,600 buyer and seller leads every year — opportunity that flows directly to SIRE brokers and their clients.

Greg's expertise extends beyond Illinois. He is a featured speaker on the Tom Ferry Speaker Bureau — the real estate industry's most respected national coaching and training platform. Listed alongside the top real estate professionals in the country, Greg speaks and trains on investment strategy, business building, and the mindset of a true industry professional. His coaching handle says it clearly: Real Estate Coach. Speaker. Trainer.

His specialties are Multifamily & Investment, New Construction, and Commercial — and here Greg will say it plainly: few people in Southern Illinois have bought, built, sold, and managed more multifamily and investment real estate than he has. As a developer, builder, and landlord long before he was a broker, Greg understands what buyers, sellers, and investors actually need — not just what looks good on paper.

Away from the office, Greg's world is golf and family. He's the head golf coach at Herrin Junior High and helped coach a state championship team — and in 2026 his son Landon shot a state-record 67 to win the Illinois state title. His daughter Ella is at SIU working toward business and arts education. And at his side through all of it is his fiancée Jennifer Broadway — SIRE's CFO and the right hand who helped him build this company into what it is today.

Credentials & Affiliations

• ✓ Designated Managing Broker — Illinois
• ✓ Tom Ferry Speaker Bureau — National Real Estate Speaker & Trainer
• ✓ Owner, Southern Illinois Realty Experts (Est. 2010)
• ✓ Owner, S.I. Property Management
• ✓ 25+ Years in Real Estate — Investor, Owner & REALTOR® (Licensed 2009)
• ✓ 10,000+ Transactions Closed
• ✓ 200+ Investment Units Owned & Operated · 750 Units Under Management
• ✓ Market VIP Partner — Realtor.com® (15 Southern Illinois Zip Codes)

What Clients Say About Greg