Nelson, Bertil Gunnar age 86, passed away in the loving care of his family on January 3, 2020. His genuine character and devotion to his family will be dearly missed. He was born to Swedish immigrant parents on Nov. 21, 1933 and cherished his early years growing up in Chicago, IL. Educated at Cal-Poly State U. in Architectural Engineering, he first utilized this education while enlisted in the U.S. Army at Redstone Arsenal. Subsequently, he built an accomplished career as President of Seneca Post-Tensioning of MN. His service and dedication to the local construction and engineering community was admired by many. Countless buildings in the Twin Cities are a result of Bert's strong work ethic and attention to detail. His 55 years with soulmate and wife, Margret, was spent enjoying life's treasures. They planned excursions, created festive moments together with family, and built a close network of Scandinavian friends. The summer cabin became a destination for the best of times. Through his hard work, he provided an environment of joy and was certain that important details enhanced our experiences. Bert was preceded in death by his father Gunnar, mother Mildred and brother-in-law Richard Dreher. He is survived by his wife Margret, sister Bernice (Dreher), children Ingrid (Jon Steele) and Paul (Kari), grandchildren Benjamin, Katie, Claire, Erin, Emma and Gretchen. Nephews David (Isabel) and Douglas (Maria) Dreher and their children were especially dear to him. Per Bert's wishes his body was donated to the University of Minnesota Anatomy Bequest Program for Medical Research. A memorial service to celebrate his abundant life will be held this summer, with information to be announced accordingly. In lieu of flowers, memorials can be directed to Svenska Sallskapet (501c3), 609 Russell Ave. S. Minneapolis MN. 55405, or donate to Minnesota Masonic Charities.