Sean J. Casey MP KC[1] (born May 16, 1963) is a Canadian politician from Prince Edward Island, Canada.

He joined the firm Stewart McKelvey in 1989 (which also included Shawn Murphy, the man he would subsequently replace as MP for Charlottetown), and was made a partner in 1993.

From 2003 to 2008 he was president of the Paderno Group of Companies, before returning to Stewart McKelvey as the firm's managing partner, until his resignation to run for office in 2011.

[3] He did not reoffer as president after completing his term in 2007, after the party's victory in the 2007 election, stating that with their forming the government after nearly eleven years in opposition, he had accomplished what he had set out to.

In Parliament, Sean has served as the Parliamentary Secretary to the Minister of Fisheries, Oceans, and the Canadian Coast Guard.