• Thomas C. Pedersen

    Thomas C. Pedersen

    CEO & Techincal Director

    Tom Pedersen has more than 40 years of experience in lubricating and formulating rigid PVC, and has developed countless lubricants systems for PVC pipe and vinyl building products.

    Tom received his degree in chemical engineering from New Jersey Institute of Technology in 1976. He started his career as a research engineer for Johns-Manville in Denver, CO, and later worked for American Hoechst in Somerville, NJ. He founded Rheochem, a Columbia, Missouri based manufacturer of waxes and PVC lubricants in October 1982. He remained at the helm of Rheochem until it was acquired by Honeywell in 1997.

    Tom is a senior member of the American Chemical Society, the American Institute of Chemical Engineers, and the Society of Plastics Engineers.    

  • Henry Renken

    Henry Renken

    President & Chief Operating Officer

    Hank Renken has nearly 40 years of experience manufacturing waxes for many applications.

    Hank served as co-founder and President & CEO of Ter Chemicals Inc. in Pass Christian, MS from 1980 to 1997. Ter Chemicals manufactured waxes and PVC lubricants sold under the Hoechst, Clariant, and Ter labels. Hank received his degree in business from Fairleigh Dickinson University and earned an MBA from Golden Gate University. He is a certified journeyman tool & die maker.

  • Robert R. Kwapisz, Jr.

    Robert R. Kwapisz, Jr.

    Vice President of Marketing

    Rob Kwapisz joined the Rheogistics team in 2007. He received his degree in chemistry from Michigan State University in 1986, and has been active in the rigid PVC industry for the last 30 years. Rob is a past president of the Vinyl Division of the Society of Plastics Engineers. He has vast experience in rigid PVC formulating and processing, especially for vinyl building products. Prior to Rheogistics, Rob was employed in technical positions by Alcoa, CertainTeed, GE, and Honeywell.

  • Marty Grimes

    Marty Grimes

    Product Manager

    Marty Grimes joined Rheogistics in 2012. He has worked for Rheogistics in production, quality assurance, research and development, and marketing. He received his degree in mathematics from the University of Southern Mississippi, and taught high school mathematics before joining the Rheogistics team. He also coached high school football and baseball. Marty was born and raised in the greater Picayune area.

  • John Repp

    John Repp

    Plant Manager

  • Charlotte Herring

    Charlotte Herring

    Customer Service & Logisitics

  • Darlene Kessling

    Darlene Kessling


  • Thomas Necaise

    Thomas Necaise

    Lead Lab Technician

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