The engagement of Robin Jay Riddell and Kerry Matthew Nunley is announced today. The future bride is the daughter of Dennis and Jamie Riddell. Parents of the future bridegroom are Emaline Nunley and Nick Nunley of Dayton, Tenn. The wedding is planned for Saturday, Oct. 16, at Christ United Methodist Church, where the future bride is a member. The bride-elect is the granddaughter of Lou Stinson, the late James E. Stinson, Mary Rose Riddell and the late J.T. Riddell. Miss Riddell received a bachelor?s degree in psychology from the College of Charleston, where she was a member of Zeta Tau Alpha Sorority. She received a master?s degree in business administration from the University of Tennessee at Chattanooga. She is a member of the Junior League of Chattanooga and is employed as a human resources generalist by Wrigley Manufacturing. The future bridegroom is the grandson of Thelma Anderson, the late Carl Anderson, the late A.J. Gilliam Sr. and the late Mae Gilliam. Mr. Nunley received a bachelor?s degree in environmental chemistry and a master?s degree in engineering management from UTC He is a member of City Church and is employed in technical marketing by INVISTA.