[2] Following his graduation, Westergren spent twenty years working as a record producer and composer (working as a nanny in between jobs), devoting the majority of his time to emerging artists and independent labels.

In 1999 he started Pandora Media along with co-founders Will Glaser and Jon Kraft.

The Oakland, Calif., company went public in 2011,[3] reporting $138 million in revenue that fiscal year.

[1] As the company's chief strategy officer, Westergren spent the majority of his time traveling the nation and gathering feedback from Pandora Radio users.

[4] In April 2016, Pandora Media announced that Westergren would replace Brian McAndrews as CEO.