In 2003, Ouimet was appointed president of Disneyland Resort. There he prepared for the resort's 50th anniversary celebration and managed the park's restoration after years of maintenance neglect.[4] In 2006, Ouimet left Disney and was succeeded as president of the Disneyland Resort by Ed Grier in an announcement made July 25.[6]
After leaving Disney, Ouimet joined Starwood as president of the company's hotel group in 2006. He oversaw global operations for more than 850 hotels in 95 countries.[3] In September 2008, he was replaced by Matthew Avril and departed the company.[7]
In December 2008, Ouimet became the president and chief operating officer of Corinthian Colleges, Inc. He announced on October 11, 2010, that he would be leaving Corinthian for personal reasons.[8]
Matt Ouimet was a director of Collective Brands, Inc., where he served on the audit and finance committee.[9]
In June 2011, Ouimet was named president of Cedar Fair Entertainment Company.[3] He assumed the CEO position on January 3, 2012.[10] On October 4, 2017, it was announced by Cedar Fair that Ouimet would be stepping down, having Richard A. Zimmerman succeed him. However, it was also announced that Ouimet would take the newly created role of Executive Chairman.[11]