Jill M. Diethelm, Senior Loan Consultant

Wintrust Mortgage


After nearly 30 years in the mortgage industry, Jill M. Diethelm, senior loan consultant with Wintrust Mortgage, has seen just about every mortgage rate, housing market or special situation imaginable — and you can bet she has the solution for every lending or mortgage challenge imaginable, too.

“I’m well-versed in conventional, FHA, VA, construction, helocs, self-employed borrowers and purchase or refinance transactions,” Diethelm says. “Now that I’m at Wintrust, I’m serving borrowers in all states and Realtors relocating clients all over the country.” She grew into the professional she is today after taking a job in 1992 with what was then known as Carriageway Financial and quickly moving into processing. “I learned so much from a couple of excellent loan officers that I processed for and began winning awards,” she recalls.

In fact, in 1998 Diethelm earned the then-Illinois Association of Mortgage Brokers’ Processor of the Year award, and the following year, she began originating. “I still have a hard time letting go of the processing side,” she laughs.

“I’m process-driven and patient, keeping all parties updated throughout the entire transaction,” declares Diethelm. Prepping clients with a full walk-through of the process and answering questions about prequalification and preapproval, she makes sure her customers know exactly what to expect and are thoroughly educated on the mortgage journey at the onset. Her clients consider her response times to be lightning fast, and her communication concise. “My manager actually calls me ‘Details Diethelm,’” she says.

Despite the challenges of staying safe while caring for an elderly parent and handling double the business in 2020, Diethelm ramped up and rose to the occasion. A wild year for sure, but no surprise for the countless clients and professionals who say “Details” Diethelm is the real deal.

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