Christofferson has led a distinguished legal career. After graduating from Duke Law School, he clerked for the Honorable John Sirica, chief judge of the United States District Court of the Districe of Columbia. Though he initially planned to clerk for just one year, Christofferson stayed on at Judge Sirica's request to assist with the Watergate trials and related proceedings over which Judge Sirica presided.
Christofferson later practiced law with Dow Lohnes in Washington, D.C.; served as senior vice president and general counsel for Commerce Union Bank of Tennessee in Nashville, Tenn.; and was associate general counsel of NationsBank (no Bank of America) in Charlotte, N.C. Since 1993, he has held leadership positions in The Church of Jesus Christ of Latter-day Saints, working in locations throughout the world and serving as executive director of the family and church history department. In 2008, he was called to become a member of the Quorum of the Twelve Apostles, the governing body of the Mormon Church. In addition to his law degree, Christofferson holds a bachelor's degree from Brigham Young University, where he was an Edwin S. Hinckley Scholar.