Our Team



Corey DeVries- President

Corey started Cornerstone in 2009, which has quickly grown into Cornerstone Real Estate Management, Cornerstone Association Management and Cornerstone Building and Maintenance.  Prior to starting Cornerstone, Corey worked on the family farm raising cows and pigs and working for his father in his construction business, DeVries Builders.  While working for DeVries Builders, Corey started building and developing his own income properties, creating his passion for Real Estate.  After working over 20 years building custom homes and remodeling for DeVries Builders, Corey had the desire to start his own company.  Cornerstone was started in the basement of his home with around 30 units to manage.  He has been blessed with growth and now Cornerstone manages around 1,500 units throughout West Michigan.  Corey is a graduate from Holland Christian High School and has both a Builder and Broker license.  When not working, Corey enjoys traveling with his wife Heather and his 3 daughters(Brooke,Kenzie and Ashey), one of their favorite locations is the Grand Tetons around Jackson, Wyoming.  Corey is an avid hunter and spends most of his fall bow hunting deer in Missouri and elk in Colorado, but nothing beats hunting with his daughters. His other interests include softball, fishing, hiking, camping and watching sports.


Tim Lohr- Business Manager

Tim joined Cornerstone in August of 2014 taking on the role of Service Coordinator in the Building and Maintenance Company and most recenty the role as Business Manager, overseeing all three companies.  Tim is a graduate of Grand Valley State University with a degree in Broadcasting/Communications and has held roles in inside sales, purchasing, scheduling, and business management in the past.  When not at the office, Tim enjoys spending time with family, traveling to amusement parks with his wife and two coaster enthusiast sons, and following Michigan football.  


Carlee Keim- Executive Assistant

Meet Carlee! She recently graduated from Spring Arbor University with a degree in marketing. While Carlee was at school she was highly involved on campus and played on their softball team. When she is not at the office, she enjoys reading, writing, and hanging out at the beach with friends!

Brandi VanDalsen - Administrative Assistant


Brandi is the new face at the front for Cornerstone! She has over five years in customer service which makes her a great fit for this position. She graduated from Zeeland West in 2014 and outside of work, she loves to spend time with her family at the cottages, mountain biking, fishing, and hiking! 



Jason DeBoer-Service Technician

Here is Jason, also known as Jay. Before Cornerstone, he worked with Padnos for over 20 years and has great experience! When he is not on the job, he likes to do anything outdoors with this wife and three kids. This includes hunting, fishing, and smoking meat!

Jason Smith - Service Technician

Jason joined Cornerstone in July of 2019.  He brings over 15 years of maintenance experience and is a jack of all trades. When Jason is not at work he enjoys hunting, fishing, and spending time with his wife, 5 kids, and 2 grandkids.




Kristen Smith- Leasing Manager

Kristen manages all aspects of our rental properties.  She has over 18 years of experience in property management and is a Licensed Real Estate Agent.  She recently re-joined the Cornerstone team in October 2018.  She was previously part of our team from 2011-2015.  In her spare time she enjoys fishing and camping with her husband and their 5 kids.

Courtney Estad- Leasing Agent

Courtney is a licensed Real Estate Salesperson and she joined our team in November of 2019.  Courtney moved to Michigan form North Dakota in 2019 where she was a leasing agent for 2 years.  She enjoys spending time with her dog and hunting.



Kirk Lydy- Association Manager

Kirk recently joined the Cornerstone team in August of 2016, as a Condo Association Manager.  His background  is well diversified as a manager as he has spent the last nine years in Property Management.  Kirk really enjoys being outdoors, either golfing, backpack hiking or in his garden.  During the winter month's he likes being in his woodshop building furniture.  What he enjoys most is spending time with his family and watching his grandkids grow up.

Marci Stevens- Association Manager

Marci joined the Cornerstone team in August of 2018 as a Condo Association Manager.  She has 5 years’ experience in property management.  Marci has her Associates Degree in Business Management from Davenport University.  Marci’s life outside of work revolve around her 3 sons and their many sporting activities.  She also enjoys reading and camping with her family. 

Keith Oosting- Association Manager

Keith joined the team in August of 2020 as a full-time condo manager. As a West Michigan native he also comes from a background of manufacturing management. When Keith is not at the office, he enjoys golfing, traveling, and fantasy football!

Karie Moore- Association Manager

Karie joined the Cornerstone team in October of 2018 and has 8 years of property management experience.  After starting at the front desk, she has recently taken on a full time Condo Manager position.  When Karie is not in the office she enjoys antiquing, painting, reading, and spending time with her family. 



Nate Broekhuizen- Real Estate Salesperson

Nate Broekhuizen is our Realtor who currently provides real estate services to buyers and sellers located in and around West Michigan. Always holding client satisfaction as his highest priority, Nate works hard to make the entire buying and selling experience as productive and enjoyable as possible. Clients working with Nate never fail to appreciate his honesty, professional integrity, and excellent communication. To learn more about Nate’s real estate services, please don't hesitate to give him a call today. In his free time he enjoys golfing, boating, reading, and hanging out with friends and family!











contact us

Management by Cornerstone

12048 James Street

Holland, Michigan 49424

Telephone: (616) 741-9600