Click on one of the people below to find out more information.

  • Isringhausen Imports
    877.364.6090

    We believe that every person who walks through our doors deserves attention, honesty and respect, including our employees. By working together in this way, we become more than a team; we become a family. Our belief is that if our employees function as a family, that family will extend its reach to our customers.  

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  • Geoff Isringhausen
    Dealer Principal
    217.528.2277

    Geoff earned a Bachelor of Science degree in Mechanical Engineering from the University of Illinois at UC in 1982. After working for a refined petroleum pipeline shipping company in Atlanta, GA, Geoff began his automotive career in 1984 by joining his brother Rob at Isringhausen Imports. At that time Isringhausen Imports was a pre-owned operation specializing in European and, even more specifically, German vehicles. Geoff was the fourth employee and through the years helped preside over the dealership's growth and many changes. Although Rob has passed on, Geoff continues his brother's legacy of treating customers and employees as they wish to be served: with dignity and respect. Geoff is now the owner/operator of Isringhausen Imports and oversees the BMW, Mercedes-Benz, Porsche and Volvo sales and service operations.

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  • Anies Humaideh
    General Sales Manager
    217.744.8580

    Anies Humaideh joined Isringhausen Imports in 1987 with a passion for unique and interesting automobiles. That passion, along with a commitment to outstanding customer service, allowed him to ascend to the role of general sales manager, where he oversees the Porsche team and other Isringhausen sales team members.

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  • Luke Isringhausen
    Sales Manager
    217.744.8535

    As the son of dealership founder Rob Isringhausen, Luke acquired a passion for fine automobiles at an early age. He began his career at Isringhausen Imports in high school as a car detailer and service driver, eventually advancing to sales. As sales manager, Luke genuinely enjoys pairing Porsche enthusiasts with exactly the right vehicle and strives to uphold the principles taught to him by his dad: integrity, honesty and fairness.

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  • Mark Dresch
    Finance Manager
    217.744.8550

    Mark Dresch has worked in the automotive industry since 1995, half of that time at Isringhausen Imports. For most of Mark's tenure, he has served as finance manager. His primary responsibilities include loan and lease acquisition for buyers and maintaining compliance with all federal and state regulations pertaining to auto lending.  He is also proud to hold a Bachelor of Science in Environmental Science from the University of Oklahoma.

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  • Jeff Colman
    Sales Associate
    217.744.8556

    Jeff Colman joined the Isringhausen Imports team in 1997 and has nearly 30 years of automotive industry experience. Jeff is a Certified Brand Ambassador, allowing him to serve the needs of passionate Porsche drivers. Jeff has loyal customers across the country and specializes in long-distance purchases, making the process convenient and easy.

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  • Mike Custer
    Sales Associate
    217.744.8587

    Mike Custer enjoys the distinction of being Isringhausen's first full-time employee, having joined the company in 1982 as our very first employee. He's held multiple positions over the years, including finance manager. Mike, a lifelong Springfield resident, now shares his love of German automobiles as a Certified Porsche Brand Ambassador.

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  • Geoff Isringhausen Jr.
    Sales Associate
    217.744.8544

    Geoff Isringhausen Jr. has been with Isringhausen Imports since 2009 and has been in Porsche sales since 2010. Geoff specializes in all things Porsche and specifically in the buying and selling in our high-end pre-owned division. Geoff Jr. and Geoff Sr. race Porsche Caymans with the Porsche Club of America and have been involved with racing since 2011. Geoff studied at California Baptist University and has a Bachelor of Science in Business Administration.

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  • Joe Isringhausen
    Sales Associate
    217-744-8577

    With Isringhausen since 2019

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  • Kent Hill
    Sales Associate
    217.744.8546

    Kent Hill came to Isringhausen Imports in 2006 after a 30-year career in law enforcement. A life-long Springfield resident, Kent was an Isringhausen customer before joining the dealership team as an employee. The transition from client to sales person was an easy one because of his respect for the business model portrayed by our store, and his respect for the products we sell. His participation with the sales team has enabled him to share his love and enthusiasm for quality, high-performance cars with customers. He sees building lasting relationships with clients as a model for success.

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  • Anthony Hofgren
    Service Manager
    217.744.8589


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  • Carl Mott
    Parts Manager
    217.744.8570

    Carl Mott began his career at Isringhausen Imports in 1999, working in the service wash bay. He's held various positions over the years, eventually ascending to Parts Manager for Porsche and other brands. Carl is proud of the enduring friendships he's forged with Isringhausen coworkers and customers alike.

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  • Gary Rogers
    Service Adviser
    217.744.8514


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  • Logan Gedaminski
    Service Adviser
    217.744.8564


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