Sidney MacEwen grew up in St. Peter's Harbour, PEI where he went to school locally. After graduating with an Industrial Engineering degree from Dalhousie University he married the most caring person he has ever met. Anita and Sidney still live in St. Peter's Harbour with their three children Rylan, Mason, and Mara. Sidney and his family fish lobster and tuna from Red Head Harbour.

Since being elected in 2015, Sidney has continued his community involvement sitting on the executives of the North Side Communities Initiative, the Morell and Area Development Corporation, and the St. Peter's Harbour Lighthouse Society. Sidney continues to coach minor hockey and baseball, teaches catechism, and volunteers with local schools.

Sidney's previous career experience includes Business Consulting, the Opposition Office Chief of Staff, and working in the Provincial Department of Health.

Sidney currently serves as the Government House Leader and sits as a member of the Standing Committee on Public Accounts, the Standing Committee on Legislative Management, and the Standing Committee on Rules, Regulations, Private Bills and Privileges.

.