Answer
Nelson spent 34 years in the Quorum of the Twelve Apostles, a governing body of The Church of Jesus Christ of Latter-day Saints. He was called to serve as an apostle in 1984 at the age of 59. During his tenure as an apostle, Nelson held various leadership positions, including serving as the president of the Quorum of the Twelve Apostles from 2015 to 2018.