Rosen attended the University of Minnesota and graduated with a bachelor's degree in psychology in 1979. While she attended college, her parents moved to Las Vegas, where she also moved after graduating. She took a job with Summa Corporation and worked summers as a waitress at Caesars Palace throughout the 1980s. While working for Summa, she attended Clark County Community College (now the College of Southern Nevada) and received an associate degree in computing and information technology in 1985. She began to work for Southwest Gas in 1990 and then left to open her own consulting business three years later.