Our Team

Meet our team


Corey De Vries

Corey was born and raised in West Michigan. He grew up working on the family farm raising cattle and hogs. Corey graduated from Holland Christian high school and went on to work for his father’s building business, De Vries Builders. As a senior in high school Corey began building and developing his first rental properties which grew his passion for real estate.  He worked for 20 years in the building business, building custom homes and remodeling while building his rental portfolio. In 2009 Corey started Cornerstone Real Estate Management.  In his free time Corey enjoys spending time with his wife and three daughters: traveling, hunting, camping, hiking. As a family they love spending as much time as possible in the mountains in Idaho.

Nate Broekhuizen

Nate has seven years of experience in the real estate industry, having dedicated the last five years to excelling at Cornerstone. Specializing in buying, selling, and property management.  He finds it important to build relationships with clients, understand their unique needs, and deliver tailored solutions. He strives to overcome challenges and ensure smooth transactions for all parties involved.  Beyond his professional endeavors he is an avid traveler, finding inspiration and relaxation in exploring new destinations. He also enjoy boating and cherishes moments spent on the water with friends and family.

Tim Lohr

With a degree in Broadcasting/Communications from Grand Valley State University and a passion for communication and community engagement, Tim has dedicated 9.5 years to Cornerstone, where he excels in developing connections with the boards he collaborates with and building strong relationships with residents in the associations. Outside of work, he finds joy in exploring new destinations with his wife, indulging in summer adventures at Sandy Pines, and actively supporting Michigan football throughout the fall season.


Keith Oosting

Keith has been an invaluable member of the Cornerstone team for the past four years, embodying a dedication to service and a passion for community engagement. With a focus on resident satisfaction, Keith excels in providing exceptional care and support, earning the trust and admiration of residents and colleagues alike.  Beyond his role, Keith actively engages with the board of directors, contributing insights and perspectives that enhance decision-making processes and drive positive outcomes for the community. His collaborative spirit and effective communication skills have established him as a respected liaison between residents, management, and the board.  Outside of work, Keith is a fervent sports enthusiast, finding enjoyment in watching various sports events, sometimes with a vested interest. His love for golfing provides a welcome escape, while quality time with family rejuvenates and enriches his life. Additionally, Keith thrives in the gig economy, showcasing adaptability and entrepreneurial spirit in diverse endeavors.

Billie Jean Olund

With a rich background spanning over two decades in property management, I am committed to fostering the prosperity and success of your community.  My journey began in 2002, where I dug into the intricacies of managing private homes and rental properties. From overseeing owners' financials to personally inspecting work sites and coordinating with skilled contractors, I've honed my skills to deliver top-notch service. Since the start of 2023, I've served as an association manager at Cornerstone.  Before joining this team, I spent five years collaborating with a Fortune 500 company, where I specialized in consulting and launching innovative products.  My academic background in business and marketing provides a solid foundation for strategic decision-making and effective communication, essential elements in my role as your association manager.  Outside of work, you'll often find me exploring the pristine landscapes of Michigan, seeking out the most serene spots and hiking trails. I'm also deeply committed to giving back to the community, participating in numerous fundraisers through walking and running—it's a fulfilling way to contribute to causes close to my heart.  I'm thrilled to embark on this journey with you as your Cornerstone association manager, and I look forward to collaborating with each of you to create a vibrant and harmonious community.


Kristi Halcome

With over a decade of experience in property management, I bring a wealth of knowledge and experience to the table. I've been proud to be a part of the esteemed team at Cornerstone Association Management for a total of 3 years, where I've honed my skills and embraced new challenges in the industry.  My passion for property management is driven by a desire to create thriving communities. I believe in fostering strong relationships with the Board of Directors as well as co-owners, ensuring that their needs are met, and their expectations exceeded.  Outside of work, I cherish spending time with my family and spending time with them on camping adventures. These experiences not only rejuvenate me but also provide valuable insights that I bring back to my professional life, helping me approach challenges with creativity and resilience.  I am committed to excellence in property management and look forward to continuing to serve both clients and communities with dedication and integrity.

Katie MacGregor

Katie MacGregor is a versatile professional with a multifaceted background. She is a Property Manager and Realtor with a wealth of experience and a dedication to excellence in every transaction.  Katie also serves as The Lakeshore Life Vacations Manager, blending her love for hospitality with her expertise in short term vacation rentals.  She holds a bachelor’s degree in business administration with an emphasis in Marketing from Grand Valley State University. An avid outdoor enthusiast, Katie embodies the lakeshore lifestyle, making her a go-to resource for those seeking a property that embraces the beauty of the Lakeshore. 

Doug Broekhuizen

After a rewarding 37-year tenure at Miller Knoll, Doug retired from a fulfilling career in manufacturing, leaving behind a legacy of commitment and achievement. Throughout his time at Miller Knoll, he played pivotal roles in procurement, particularly in purchasing veneer and lumber, while also spearheading initiatives in safety and operational excellence within the wood plant.  Transitioning into a new chapter, he found himself drawn to the dynamic world of property management. For the past two years, he has served as a dedicated portfolio manager at Cornerstone, leveraging my expertise to navigate the complexities of property portfolios with finesse. With an additional four years of experience in property management under his belt, he brings a wealth of knowledge and a passion for optimizing operational efficiency.  In collaboration with his youngest brother Joel and father Andrew, he embarked on an entrepreneurial venture, establishing a laundromat in Cedar Springs, Michigan, in September 2023.  He has four adult children and four grandchildren, eagerly anticipating the arrival of the fifth. He finds joy in exploring the great outdoors, whether it's backpacking along the rugged trails of the Appalachian Trail or staying active through running, stair climbing, cycling, rollerblading, and leisurely walks.

Kadian Scott

I'm passionate about creating a smooth and positive experience for our residents at Cornerstone.  Leveraging my skills, I collaborate with our talented team to offer exceptional housing solutions.  Whether you have questions about finding the perfect place or need ongoing support, I'm here to guide you.  Originally from Jamaica, I bring a touch of island warmth and a commitment to exceptional service.  I'm thrilled to help you find your perfect home at Cornerstone!

Missie Bredeweg-Rice

Missie recently embarked on a new journey as an executive assistant in the field of property management. With over a decade of experience managing medical and dental offices, she brings a wealth of organizational expertise and a keen eye for detail to her new role.  She has a bachelor’s degree in health services and human resource management, she is eager to apply her diverse skill set to the dynamic world of property management.  She is dedicated to learning every aspect of this exciting field.  Outside of work, she values spending time traveling and relaxing at her family cottage with her husband and kids.

Megan Brinks

Megan is a dedicated Front Desk Receptionist at Cornerstone, bringing her warmth and professionalism to every interaction since joining the team in January 2024. With her vibrant personality and exceptional organizational skills, she ensures that every visitor receives a warm welcome and efficient assistance.  Outside of her role at Cornerstone, Megan finds joy in spending quality time with her beloved family and friends. Her adventurous spirit often leads her to the great outdoors, where she enjoys camping and immersing herself in nature.

Cindy Baas

I have almost 30 years of experience in accounting. I have extensive knowledge of the entire accounting process including banking, finances, general ledger auditing, financial statement preparation, and risk management. I am currently pursuing my master's degree from Davenport University in Forensic Accounting. Forensic Accounting is a passion of mine and I enjoy it very much.  My previous positions have been in the tool & die industry and within many areas of construction.  I love creating systems and processes along with being able to make the entire accounting system transparent and easy to understand.  In my free time I enjoy traveling, gardening, and spending time with my husband and two rescue dogs. 

Carrie Compagner

Carrie is a life-long learner and currently working on her MBA at Davenport University following a diverse career. Carrie spent ten years as a clerk for rural Pokagon Township in Dowagiac, Michigan where she enjoyed frequent interactions and events with local farmers and the Pokagon Band of Potawatomi Indians. During that same time, she worked at Southwestern Michigan College teaching algebra and several other classes. More recently, Carrie had a 7-year real-estate career where she held a number of customer facing roles including leading a team of agents.  In her personal life, Carrie enjoys hiking, running (or attempting to), weekends with family in her motorhome, and just some coveted quiet time. Carrie is also mom to three kids and two step kids (one of blessed memory). Every year her family hosts a bass fishing charity tournament in memory of her stepson who was an avid fisherman. The funds they raise are put towards a catch and release pond at the Outdoor Discovery Center in Holland, MI where kids can fish and enjoy nature.


Building and Maintenance Team

Jason De Boer

Mykele Banks

Andrew Wagenmaker

Lee Siersema




contact us

Management by Cornerstone

12048 James Street

Holland, Michigan 49424

Telephone: (616) 741-9600