John Grettenberger, Jr.

Chief Executive Officer

John Grettenberger Jr., the grandson of LorAnn Oils Founder O.K. Grettenberger, started his full-time career at LorAnn in 1993 as General Manager.

Growing up, John lived in numerous locations throughout the United States, and the world, following his father’s career with General Motors. International homes included Tokyo, Japan and Koenigstein, Germany.  After graduating from The Frankfurt International School in Germany. John attended The University of Michigan in Ann Arbor where he played baseball and met his wife Sandy. After graduating with a BBA, John returned to the U of M to earn his MBA.  His first career path was with General Motors Corporation in a variety of sales and marketing positions in Detroit and Chicago.

John stays active in the community. He’s a Lansing Rotarian and past president, serves on the Board of Directors for the Sparrow Hospital Foundation and on the Board of Directors for the Impression 5 Science Center. John is also the Board Chairman for The Dart Bank.  John enjoys spending time with family as well as golfing, biking, cooking, traveling and generally eating great food. 




Chief Operating Officer

Carl joined LorAnn Oils in 1993 after leaving a career as a manufacturing engineer at General Motors.  At LorAnn he is actively involved in the production and scheduling activities of the organization.  “It is very exciting to be part of a growing, family owned and operated business”.  Carl received a Bachelor of Science degree in Packaging Engineering with a minor in business management from Michigan State University. 

“I am thankful to live in a wonderful community where I can get involved in various activities and interact with many great individuals”, says Carl.  Spending time with his wife Beth and their two beautiful daughters has been his single biggest thrill in life. 



Troy Sprague

National Sales Manager

Troy Sprague has been LorAnn Oils’ National Sales Manager since 2002. He has spent over 35 years in both Pharmaceutical and Consumer Packaged Goods Sales. He is responsible for sales, marketing and partnership with key wholesale accounts. Troy holds a Bachelor of Science in Food Marketing from Western Michigan University. Troy enjoys time spent with his family most. He is an avid outdoorsman enjoying time in the woods, fields and streams of Northern Michigan. Troy and his wife Karen have three children and live in Holt, Michigan. 



Sandy Grettenberger

E-Commerce Director

Sandy began her career at LorAnn Oils in 1997 as a company spokesperson and product demonstrator appearing on various television programs across the country. Over the years, her role has expanded to include all aspects of marketing for LorAnn including customer communications, website development, internet advertising, social media, product testing, recipe development, and website photography. Sandy attended Babson College in Wellesley, MA, as well as the University of Michigan Business School where she earned a BBA. She has been involved with several philanthropic organizations including the Junior League of Lansing and the Lansing Symphony Orchestra. She is an avid golfer and enjoys spending time with her two daughters and husband, LorAnn CEO John Grettenberger, Jr.



Joseph Lothamer

International Sales Manager

Joseph Lothamer has several years at food export sales for companies in Michigan and New York.  Prior to joining LorAnn Oils Joe was the Export Sales Manager for a large agriculture company selling primarily to companies in Europe and Asia.  In addition, Joe spent 10 years as the Director of Promotions for a national grower funded commodity organization. Joe grew up on a vegetable farm in south central Michigan and spent summers working in his family’s farm market.  He has traveled extensively throughout Europe, Asia and Latin America and lived in Brazil.  Joe holds a Bachelors of Science degree in Food Distribution and Agriculture Distribution from Western Michigan University.  He enjoys cooking, gardening and photography.  Joe, his wife Linda, and three daughters live in East Lansing, Michigan.



Robin Murphy

Customer Service Manager

Robin joined LorAnn Oils in 1996, took some time off to start a family, then returned in 2010 as a Customer Service Representative.  She had the privilege of working with Joseph in the International Department before accepting the position of Customer Service Manager.  She has worked in customer service throughout college and previous positions.  Robin enjoys spending time with her husband and family as well as biking the great outdoors. 



Beth Thelen

Director of Technical Services

Beth is one of the granddaughters of LorAnn Oils' founder O.K. Grettenberger and worked at LorAnn off and on through high school and college.   She came back permanently after moving back to the Lansing area in 1991. Beth has a B.A. in Communications from Michigan State University.  She spends her free time with her two beautiful daughters and husband Carl, at horse shows, car shows, or skiing in northern Michigan in the winter.  When home, she can be found in the barn with her horses, mini donkeys, llamas, and dogs.



Laura Perniciaro

Business Manager

Laura, also a granddaughter of O.K. Grettenberger, has worked at LorAnn Oils in many various capacities throughout high school and college.  Now, as Business Manager, she focuses primarily on Accounts Receivables and collections, and is also the main contact for EDI accounts.  Outside of work, Laura and her husband Chris enjoy showing Quarter Horses throughout the United States and Canada.  She also inherited her grandparents’ love of harness racing and continues to raise and race Standardbreds in the O.K. Grettenberger tradition. 



Barbara Gillett

Information Technology Manager

Barbara joined LorAnn Oils in early 2016 as Information Technology Manager bringing and enjoying over 20 years’ experience in the IT arena. She is degreed in IT, specializing in system Information, process improvement and trouble shooting.  She often comments on how much she enjoys the camaraderie, professionalism and cooperation she receives from management and her family of co-workers.  Originally from the Brighton/Howell area and time spent living all over the Midwest, she and her husband jokingly admit that it only took 22 years to get back home to Michigan, she loves “her” Great Lakes. She worships her seven grandchildren and travels frequently for spoiling rights.  In her down time she’s enjoys golfing, camping or designing and making projects in her sewing room with her Computerized (of course) Sewing Machine.