• Harry-WhiteBG_PRINT Oct-2018

    Harry Simpson


    Harry Simpson is the founder and President/CEO of Crimson Renewable Energy LP. As CEO of both Crimson and SeQuential, Harry is responsible for the lifecycle of oil collection, biodiesel production and fuel distribution. Full Bio

  • Company_Tyson

    Tyson Keever


    Since co-founding SeQuential in 2003, Tyson has helped develop a network of 85+  biodiesel retailers in OR and WA, as well as a division that collects the spent cooking oil used to produce the company’s own fuel. Full Bio


  • Roger Rowe

    Roger Rowe


    Roger is the interim CFO for SeQuential. He oversees all financial and accounting activities and incorporates that data into operational decision-making processes throughout the company. Full Bio

  • Ryan McMackin

    Director of Human Resources

    Ryan oversees all human resource functions companywide–including strategic planning, continued human capital analysis, recruiting, benefits administration, etc. Full Bio

  • Company_Nancy

    Nancy Sage

    Director of Sales and Marketing

    Nancy is responsible for SeQuential’s sales, marketing and customer service functions. She has more than 20 years’ experience leading sales teams and building customer support infrastructure. Full Bio

  • Jeff Van Dyke

    Director of Operations

    Jeff has been the Director of Operations at SeQuential since 2013. His diverse background in water treatment, brewing, and biodiesel production has made him an intricate part of SeQuential’s growth and success. Full Bio

  • Company_Rachel

    Rachel Shaver

    Marketing Manager

    Rachel leads all marketing and communications efforts for SeQuential.
    Full Bio

  • Company_Kevin

    Kevin Kuper

    Finished Products Manager

    Kevin oversees the sale and distribution of SeQuential’s finished bioproducts to customers throughout the western United States.
    Full Bio