Meet the team

The agents behind The Osterman Team

Mark and Kelli Osterman of The Osterman Team

Two distinct backgrounds. One powerful partnership.

A real estate team built on design, construction, lending, and marketing expertise

Very few real estate teams can offer expertise in interior design, residential construction, mortgage lending, marketing, and real estate under one roof. Mark and Kelli’s combined experience allows them to evaluate homes from multiple perspectives: how they’re built, how they’re financed, how they’re presented to the market, and how they’ll function for the people who live in them. The result is a more informed, strategic approach that helps their clients make better decisions whether they’re buying, selling, building, or investing.

When you hire one of us, you benefit from the expertise of both.

Mark Osterman

Mark Osterman

REALTOR®

LIC. #173758 · The Agency

Mark got hooked on new construction before he ever sold a house. As a loan officer at a bank, he worked with construction lenders and watched homes go from a bare lot to foundation, framing, roof, cabinets, and paint. Seeing people's faces on move-in day is what did it.

In 2007 he moved to the builder side, and he's spent much of the time since working for home builders across the OKC metro, learning what goes into a home long before a buyer walks through the door. He's been a licensed REALTOR® since 2016 and has 19 years of new construction experience. His lending background means he knows how a deal gets financed. His degrees in marketing and management show up in how he prices, positions, and negotiates.

Mark moved from Kansas City to the Oklahoma City area 30 years ago and has been married to Kelli for 25 years. In his spare time, you'll find him in a kayak, fishing the small private lake they live on in Oklahoma City.

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Mark Osterman brings more than 30 years of experience in the construction industry, complemented by a strong background in mortgage lending, business management, and residential real estate. As a licensed Oklahoma real estate professional for more than a decade, Mark offers clients a distinctive combination of industry knowledge, financial insight, and hands-on construction expertise that extends well beyond the traditional real estate transaction.

With degrees in Marketing and Business Management, Mark’s professional background provides a solid foundation in business strategy, financial considerations, and client relationships. His previous experience in mortgage lending gives him valuable insight into the financing process, allowing him to help buyers better understand the financial aspects of purchasing a home and make informed real estate decisions.

Throughout his career, Mark has worked extensively in the construction industry and alongside multiple Oklahoma homebuilders, developing a comprehensive understanding of new construction, building processes, and the details that contribute to a home’s quality, functionality, and long-term value. His experience provides clients with a knowledgeable perspective when evaluating properties, navigating new construction, and making important decisions throughout the homebuying process.

What truly sets Mark apart is his ability to combine decades of construction experience with financial knowledge and real estate expertise. His practical, straightforward approach and attention to detail allow him to guide clients with confidence, professionalism, and a genuine commitment to their individual needs. Whether purchasing an existing home, building new, or selling a property, Mark understands the importance of providing knowledgeable guidance and personalized service.

Beyond real estate, Mark and his wife of 25 years, Kelli Osterman, are also partners in their real estate business. Together, they’ve built a life in Edmond, Oklahoma, where they’ve raised their son, Cade, who attended Edmond Memorial High School. Their family also includes Ace, their beloved Labrador retriever.

Having spent decades working in Oklahoma’s construction and real estate industries, Mark understands that a home represents more than a financial investment. It’s a place where families establish roots, build their futures, and create lasting memories.

405-818-9670

mark@markosterman.com

Kelli Osterman

Kelli Osterman

REALTOR®

LIC. #151560 · The Agency

Kelli came into real estate by understanding homes from the inside out. With a Bachelor of Interior Design from the University of Central Oklahoma in Edmond, she learned how layout, flow, and function shape daily life. She started with an OKC-metro home builder, then earned her real estate license and went on to work with new construction builders throughout her career, so she knows the mechanics behind the walls and the details most buyers never think to ask about.

Kelli has worked in director and executive-level roles alongside C-level executives, where attention to detail was non-negotiable. She has raised a son, cared for aging parents, and moved fourteen times as an adult, so she knows what a move asks of you beyond the real estate.

Today she works alongside her husband Mark, a licensed REALTOR® with 19 years of new construction experience and a background in mortgage lending. They start with the person, not the property, and when you work with one of them, you get the expertise of both.

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Kelli Osterman brings more than 20 years of real estate experience and a distinctive professional background in economic development, executive leadership, interior design, and new construction. Her diverse expertise provides clients with a broader perspective on the people, properties, and opportunities that shape Oklahoma’s real estate market.

As a former Foreign Direct Investment Specialist with the Oklahoma Department of Commerce, Kelli gained valuable experience in business recruitment, economic development, and working with executives, key personnel, and families relocating to Oklahoma. Her experience as Director of Sales for an Oklahoma-based oil and gas services company further strengthened her business acumen, leadership skills, and strategic approach to real estate.

A graduate of the University of Central Oklahoma in Edmond, with a degree in Interior Design, Kelli also brings extensive hands-on experience working with Oklahoma homebuilders. From representing buyers purchasing new construction to being closely involved in the design and building process, she offers clients a unique combination of market knowledge, construction insight, and an appreciation for quality and design.

What truly sets Kelli apart is the depth and diversity of her experience. Few real estate professionals bring together this combination of business expertise, economic insight, design education, and construction knowledge. Her approach is thoughtful, professional, and personal, with a genuine commitment to helping clients make confident decisions and feel at home in Oklahoma.

Beyond real estate, Kelli has called Edmond home since graduating college more than 20 years ago. She and her husband of 25 years, Mark Osterman, are also partners in their real estate business. Together, they’ve raised their son, Cade, in Edmond, where he attended Edmond Memorial High School. Rounding out the Osterman family is Ace, their beloved Labrador retriever.

Having built both a career and a life in Oklahoma, Kelli understands that a home is more than an address. It’s where families grow, memories are made, and the next chapter begins.

405-808-1082

kelli@kelliosterman.com

Contact us

405-593-8326 · team line

team@theostermanteam.com

112 S Broadway, Edmond, OK 73034
The Agency

What our clients say

★★★★★

“Mark and Kelli Osterman helped us sell a home my mother has lived in for the past 50 years. It was a unique 2 acre property on a lake in the middle of OKC. We met several other agents and decided on Mark and Kelli because they understood the uniqueness of the property and had strong marketing ideas. They went above and beyond to get us the most value for our home during this challenging market. During the negotiation processes, their expertise shown through and brought us a higher value than we anticipated. They also had a very kind, compassionate approach to working with my 87 year-old mother and myself. They kept in touch during the entire process. Mark and Kelli handled the process with care, professionalism, and understanding from start to finish. We are truly grateful for their guidance and highly recommend them.”

Melissa H., about Mark and KelliGoogle · 2026-10-26

“Mark and Kelli assisted my wife and me in finding our new home in Edmond, Oklahoma. We were from out of town, but visited regularly during the search process. In the beginning, Mark and Kelli took the time to understand our housing needs and wants, and provided appropriate advice to make our search more efficient. They were flexible in schedule and most responsive. As experienced buyers, my wife and I had high expectations, and Mark and Kelli delivered. They combine outstanding knowledge of the market, neighborhoods, and builders, with the utmost professionalism and integrity. Mark even provided factual considerations on building quality and efficiency. They were also a pleasure to be around and reduced the stress of the overall process. Needless to say, my wife and I plan to refer colleagues, friends, and family.”

Ryan T., about Mark and KelliClient review

“Kelli was recommended by my new employer to help us in our relocation to Oklahoma. In moving here from out of state, Kelli helped us identify the communities that fit our search criteria, and her organized approach helped us make the most of our short time in locating a home in Edmond that fit our needs. Before our first trip to the state, Kelli set us up with a personal website that identified homes that met our search parameters, which kept track of our favorites and remarks in one easy location, so we were all on the same page once we arrived in town. Kelli is professional and easy to work with, and she helped make the home-buying process a smooth one. She handled all of the details from the initial offer all the way through the final closing on our new home. We would recommend Kelli to others relocating to the Oklahoma City metropolitan area.”

Jerry W., about KelliClient review