Brother Heflin was born on May 13, 1947, at Harlan, Iowa. Brother Dennis graduated from Harlan High School, and attended Iowa State University, where he studied Farm Operations short course. He has been a lifetime member of the First United Methodist Church in Harlan. He has served the 4-H as a Club Leader, Past Shelby County Fair Board Member, Past Corley Community Club President, Past Center Township Trustee, Member of the Iowa Barn Foundation. Dennis has also received the Governor Community Service Award in 1999 and the Distinguished Service to Agriculture – Audubon County Farm Bureau. Dennis married Linda Kelly on February 11, 1967 in Hot Springs, South Dakota and they have a three daughters Kimberly (deceased), Kelly, and Kari.
Brother Dennis received his symbolic degrees of Masonry at Parian Lodge No. 321 in Harlan. He was initiated on March 6, 1972; Passed on March 24, 1972; and Raised on April 10, 1972. He served his lodge as Worshipful Master in 1979 and again in 2012. His service to Iowa Masonry includes serving as Grand Chaplain in 2013-14, Junior Grand Warden in 2017-2018, Lodge Service Committee in the 1980’s and again from 2014 to 2019. He also served on the Committee on Division and Reference from 2016-2017, serving as Chairman in 2019-2020.
Other Masonic affiliations include the Sioux City Consistory. He is a member of Exodus Chapter Order of Eastern Star Chapter No. 313. He is a member of Research Lodge No. 2 and he holds District Lecturers Certificate No. 2786.