In 1995 she joined Industry Entertainment (formerly Addis/Wechsler) as an assistant.
In March 2016 she became a partner at Lighthouse Management & Media.
Has a daughter Dylan and son Will.
She launched her own company, Margaret Riley Management in 2002, before segueing to Brillstein Entertainment Partners from October 2006 through March 2016.
Served on the board of the OmniPeace Foundation, a nonprofit whose mission is to provide music education to children in Africa and its developing countries.
Attended film school at the American Film Institute.
After graduating from the AFI she was director of development for Tim Disney's Virtual World Entertainment, a gaming/interactive company, and developed science-fiction properties into films at New Line Cinema during her tenure.
Graduated from the University of Kansas with a degree in journalism.