Cornwallis was until 1994 a military base called CFB Cornwallis. Now closed, the former base and surrounding area is known as Cornwallis Park and is used for civilian purposes. There is still a somewhat military presence in the area with the Pearson Peacekeeping Centre which is a non-profit, independent organization which was setup in the same year the base closed.
Also making their home in Cornwallis is the Annapolis Basin Conference Centre which is now one of the top meeting facilities in Nova Scotia. They have taken over a number of the previously military buildings and use them to host many different conferences and events.
Convergys, which is a worldwide provider of customer contact centres, has a large operation in Cornwallis which is one of the region's largest employers.