I am a 21 yr veteran in the mortgage banking industry. Specializing in Jumbo,  Conventional FHA and VA home loans.

SVP of Mortgage Lending

Thomas Griffith is your Oak Brook local lender. As a loan officer at Guaranteed Rate, one of the largest retail mortgage lenders in the United States, Thomas is committed to helping homeowners with home purchase loans and refinances, while simplifying the mortgage process and making your home loan experience easy to navigate. Contact Thomas at (630) 869-1077 for more information!

Thomas Griffith at Guaranteed Rate (NMLS #664633)

A seasoned originator, Jonas Byrer applies extraordinary customer service, constant communication and a relentless work ethic to the mortgage process. The Byrer team truly offers a full-service mortgage banking experience equipped to handle your business seamlessly from start to finish while providing an excellent standard that clients have come to appreciate. Among his specialties are assisting first time home buyers and renovation financing. With various strategies, Jonas ensures clients will secure the best financing options, including down payment assistance programs and other effective incentives. While previously holding his Series 6, 63, Life, Health and Property & Casualty licenses; Jonas provides an in-depth financial understanding of the intricacies of self-employment income and real estate investment strategies, and the managerial savvy to execute any plan of action on behalf of your business. Jonas's personal touch has created lasting relationships that go above and beyond the mortgage process with much of his business generated via referrals from clients and professional partners. He is committed to providing the best experience possible for both the customer and referral partners. You can learn more about Jonas at www.linkedin.com/in/jonasbyrer www.facebook.com/teambyrer and www.rate.com/jonasbyrer for product specific information and completing an online application. Licensed to work in: Florida (LO34989), Georgia (57177), Illinois (031.0039763), Indiana (31440), Iowa (26917), Wisconsin (437120). Guaranteed Rate NMLS ID:2611

VP of Mortgage Lending/Renovation Specialist

Jonas Byrer is your Oak Brook local lender. As a loan officer at Guaranteed Rate, one of the largest retail mortgage lenders in the United States, Jonas is committed to helping homeowners with home purchase loans and refinances, while simplifying the mortgage process and making your home loan experience easy to navigate. Contact Jonas at (847) 232-2728 for more information!

Jonas Byrer at Guaranteed Rate (NMLS #437120)

I entered the mortgage business in 2003, when I wanted to get involved in a different aspect of the financial industry and have a direct impact on helping people with the biggest purchase of their lives.   I attended Purdue University and majored in accounting, which helped continue my love of working with numbers.   I am a life-long resident of Chicagoland and am married to my high school sweetheart and together we have 2 wonderful children.

Branch Manager/SVP of Mortgage Lending

Keith Ulbrich is your Oak Brook local lender. As a loan officer at Guaranteed Rate, one of the largest retail mortgage lenders in the United States, Keith is committed to helping homeowners with home purchase loans and refinances, while simplifying the mortgage process and making your home loan experience easy to navigate. Contact Keith at (630) 780-1796 for more information!

Keith Ulbrich at Guaranteed Rate (NMLS #442589)

Val King's 20+ years mortgage lending experience and consumer driven service commitment have propelled her reputation as one of the top real estate lending professionals in the nation.  An expert at educating first time buyers, Veterans, and jumbo home buyers, Val takes the time to understand her client's long term goals. She is a master at selecting the best home loan to  to help each client realize their dreams.

Val King is your Oak Brook local lender. As a loan officer at Guaranteed Rate, one of the largest retail mortgage lenders in the United States, Val is committed to helping homeowners with home purchase loans and refinances, while simplifying the mortgage process and making your home loan experience easy to navigate. Contact Val at (312) 881-4317 for more information!

Val King at Guaranteed Rate (NMLS #247722)

After a twenty-six year stretch banking the Oak Park and River Forest communities, it was time to take his financial services to the next level. Nobody knows the pulse of the local market like Sean. Nobody understands the needs of OPRF's sophisticated clients like he does. With his knowledge and understanding of the needs of this community and his belief in the Guaranteed Rate philosophy, Sean promises to deliver the same customer first experience you expect and deserve. With cutting-edge technology and low rates, expect nothing less than the unmatched service and expert advice that Sean and Guaranteed Rate promise to deliver…every time! They are committed to making the mortgage process as seamless, friendly and financially valuable to you as possible.


Sean was born and raised in Oak Park. On to the next generation, he and his wife are raising their children blocks from his childhood home. He is a lifer as they say. A DOOPER as some would say.


He started his career on Lake Street in Oak Park as a teller, while earning degrees in Finance and Marketing from the University of Illinois in Chicago. Today, he enjoys providing honest advice to his mortgage clients; from first time homebuyers to those downsizing. His passions are family, friends and travel. Most of Sean's travels take him to the mountains, where he enjoys skiing; when the snow comes, the mountains call. When not in mountain mode, a nice relaxing week on the beach is a must for his family.

VP of Mortgage Lending

Sean Olis is your Oak Brook local lender. As a loan officer at Guaranteed Rate, one of the largest retail mortgage lenders in the United States, Sean is committed to helping homeowners with home purchase loans and refinances, while simplifying the mortgage process and making your home loan experience easy to navigate. Contact Sean at (630) 315-7749 for more information!

Sean Olis at Guaranteed Rate (NMLS #1080341)

As your trusted Guaranteed Rate Loan Officer, my goal is to simplify the mortgage process, make your home loan experience easy to navigate and be available to you from application to closing. I take pride in thoroughly educating my customers throughout the mortgage transaction, so they fully understand their options and feel comfortable with their chosen loan program. Whether you are a first time home buyer or seasoned owner, you can trust me and my team with all of your home financing needs. Please reach out anytime using the contact information located on this page and use this website as a resource as you start your home financing journey.

Kathryn Rachuy is your Oak Brook local lender. As a loan officer at Guaranteed Rate, one of the largest retail mortgage lenders in the United States, Kathryn is committed to helping homeowners with home purchase loans and refinances, while simplifying the mortgage process and making your home loan experience easy to navigate. Contact Kathryn at (630) 487-3602 for more information!

Kathryn Rachuy at Guaranteed Rate (NMLS #2152807)

Oak Brook

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6 Loan Officers in Oak Brook, IL