Jamieson was a frequent substitute news anchor on Today throughout the 1980s, filled in as anchor on NBC Nightly News, and served as the anchor of NBC News at Sunrise from 1986 to January 1987.
Jamieson frequently stepped in as the primary news anchor on Today during the 1980s, also serving as the main anchor on NBC Nightly News, and led the morning program NBC News at Sunrise from 1986 until January 1987.