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

  • Greg Kach
    Dealer Principal

    My father was a Chevrolet dealer in Duluth, Minnesota for 23 years. His business afforded me a great start in the industry.In 1968 I began in the Parts Department at age 13, then advanced to car detail and light maintenance on the preowned lot.  My sales career began in 1975 as a favor to a former high school Business Policy teacher.  Uncomfortable with the sales process, he asked if I would help him buy a new Caprice wagon. Most of my teachers and coaches had traded with my family's dealership but I had never personally handled a sales transaction from start to finish. I got the bug; throughout my final two years of college, I sold full-time, working afternoons and evenings.

  • Steve Lujan
    General Manager

    I have 30+ years experience in automotive sales. In 2000, I  joined the Jackie Cooper Family as General Sales Manager.  In late 2012 I assumed the role of General Manager.  However, you can find me all over the dealership doing all kinds of work!In my spare time I enjoy golfing and traveling.  I also enjoy dining out and working out in the yard.  I love spending time with my family and my grandson!

  • Nizar Khaled
    Porsche Brand Ambassador Manager

     I have been in the automotive industry for 26 years and part of the Jackie Cooper Family for over 14 years.  I am a Brand  Ambassador and Porsche Certified for sales. I have always been a Porsche enthusiast!  I am an active member of the Cimarron Region Porsche Club of America and a consistent participant in the Porsche Driving School and have logged over 65 hours!  I am a current owner of a Porsche GT2 and a Porsche Cayman S.  I have owned 6 Porsches over the course of the last several years.My hobbies include collection of new and vintage Porsche paraphernalia and an avid racer of 120cc-shift go karts.

  • Jonathan Walter
    Brand Ambassador

    I love Porsche. I grew up with a love for the Porsche sportscar and the brand. My goal is to make purchasing a Porsche an exciting experience to last a lifetime. I am an alumnus of Oral Roberts University. I grew up on the east coast in Virginia Beach but am proud to call Tulsa my home now. I am married and have one son. In my spare time, I enjoy scuba diving and soccer. My favorite Porsche is the 2005 Carrera GT.

  • Mark Lorentz
    Service Director

     started with Jackie Cooper in 2005 as a Service Advisor for Porsche.  I was then promoted to Nissan Service Manager and a year later promoted to Service Manager for Infiniti, Volvo and smart.  On 2/1/2008 I became the Service and Parts Director for Jackie Cooper Imports overseeing all fixed operations.I was born and raised in Minnesota and married my wife, Robyn there and we have two boys.  We relocated to AZ and lived there for 20 years before moving to Tulsa.  Robyn and I have four grandchildren the youngest is 2 years old.  Our children are the reason I am energized and work the way I do.  I love my family, the job I do and the people I work with.  I enjoy the outdoors and my passion is hunting and fishing.  But anything to do with nature puts a smile on my face.

  • John Sommers
    Service Director

    I joined the Cooper family in 1991 as a technician eventually working my way up to Shop Foreman to Service Director.  I have enjoyed watching our business grow over the years. I am Porsche Gold Certified.  I continue to take off site classes as well as Internet classes to keep these certification up to stay on top of the ever changing technology in automobiles.

    In my spare time I enjoy precision rifle shooting.

  • Denny Martin
    Porsche Service Manager

    I have been in the auto industry for 18 years and with the Jackie Cooper family since 2007.  am Porsche Certified and am currently working on the Brand Ambassador program with Porsche.

    I am married with two beautiful daughters.  In my spare time, I love riding my Harley and spending time with my family.

  • Sarah Keeton
    Porsche Service Advisor Brand Ambassador

    I worked for a pre-school for 10 years before joining Jackie Cooper in 2012.  I started out in customer service and was later promoted to Service Advisor. I am a Certified Porsche Service Brand Ambassador.In my spare time I enjoy hanging out with my three girls singing and dancing.  My older girls and I like to run and recently got into playing disc golf as a family.

  • Cliff Jones
    Porsche Service Advisor Brand Ambassador

  • Blake Waeger
    Certified Diagnostic Specialist-Gold

  • Matt Fenwick
    Certified Diagnostic Specialist-Gold

  • Ro Rios
    Certified Diagnostic Specialist-Bronze

  • Mike McKie

    I have been in the automotive business for over 15 years and joined the Jackie Cooper family in 2010.  I enjoy camping, cooking out and hanging out with family and friends.  In my spare time you can find me hanging out with my wife and three daughters.

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