45 Years Strong: A Green Bay & Northeast Wisconsin Real Estate Tradition
Proudly serving Green Bay and Northeast Wisconsin since 1980 as an independent, locally owned real estate agency built on experience, trust, and relationships.
Rooted in Green Bay Wisconsin Since 1980
For 45 years, we’ve helped generations of Northeast Wisconsin families buy and sell homes. While the market has changed, our commitment to this community has not. We’re not a franchise. We’re not owned by a national corporation. We’re local—because Northeast Wisconsin deserves a real estate partner who knows it inside and out.
Independent by Choice
Being independently owned means our decisions are made here—by people who live, work, and invest in this community. We’re free from corporate scripts and one-size-fits-all approaches, allowing us to focus on what matters most: our clients.
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Locally owned and operated
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No franchise rules or outside agendas
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Personalized strategies for every client
Experience That Makes a Difference
Our agents bring decades of combined experience navigating every type of market—from booming demand to challenging cycles. That knowledge helps buyers make smart investments and sellers maximize their results.
- 22 Average years of agent experience
- 45 Total years serving Green Bay
- 13,255 homes sold in Brown County in the last 5 years
Why Our Agents Stay—and Why Clients Trust Us
“The owners are local and understand how our neighborhoods and population have grown. We are not a franchise, so we can do things in a manner that is good for our community. We understand our local market and we’re small enough to understand our buyers and sellers too.
30 years plus history means I posses deep, experiential knowledge of how to navigate market cycles (rises, bubbles, crashes, and booms). I have adapted to the “internet revolution” and the mobile revolution. While the next decade is expected to be even more revolutionary due to AI, my ability to provide human expertise and negotiation skills in a high-tech world remains highly valuable.” – Barb Machon, Realtor at Mark D. Olejniczak Realty for 39 Years.
“We make sure you understand every step of the process. We are reliable, supportive, and will find a way to help you through.” – Alana Rose, Realtor at Mark D. Olejniczak Realty for 1 Year.
“I’m proud to work at Mark D. Olejniczak Realty because of the strong reputation the brokerage has built in the community. Everyone is willing to help each other, which ultimately helps us serve our clients better.” – Meagan Janssen, Realtor at Mark D. Olejniczak Realty for 1 Year.
“Tenure, expertise, reputation for being the best for many years are what set us apart. Experience over the years and consistency year over year is key to staying accurate on price recommendations, strategies, and marketing techniques. Clients feel comfortable working with us because they know the reputation of the company as having the best, most knowledgeable agents.” ” – Patrick Austin, Realtor at Mark D. Olejniczak Realty for 15 Years, with 20 years in real estate.
“We have well educated, professional agents. The brokerage is locally owned and not under the control or direction of a “corporate” mindset. The culture, the company history, the professionalism, and the reputation make me proud to work here. Working at Mark D. Olejniczak Realty has made me a better person and better agent.” – Susan Ley, Realtor at Mark D. Olejniczak Realty for 20 Years.
Today’s Team – The Team Behind the Tradition
While we honor our past, we’re focused on the future—guided by the same values that have defined us for 45 years.
Thinking of Buying or Selling?
Choose the agency that’s been here before—and will be here tomorrow.
