After practicing briefly as a corporate litigator with the Chicago firm of Hopkins & Sutter, Nissenson was hired as chief investigator of the consumer affairs unit (Factfinder) at WBBM-TV Chicago.
Nissenson was hired by NBC Network News in 1982, where, in addition to being a correspondent on three presidential campaigns,[REF] she sometimes guest-anchored on Today,[REF] NBC News at Sunrise, NBC News Overnight and NBC News Digest.