By the age of 25, her goal was to start her very own business. Cassidy is known for leading many online businesses such as theBoardlist, Joyus, and StubHub. Cassidy also worked as CEO of Polyvore for some time. It is an online marketplace. Additionally, she worked for more than 5 years as president of one of Google's international businesses. She has led to the growth of many tech businesses. She still works as chairman of many companies including theBoardlist and Joyus. She continues to be a board member of Urban outfitters. Her goal is to assign women in to more leading positions on boards and lead successfully.