https://www.gamespot.com/articles/rainbow-six-sieges-new-operators-teased/1100-6456458/

Rainbow Six Siege's third season of content is kicking off soon with the launch of a big update and the Outbreak event. But Ubisoft already has more in store for Year 3 Season 1, including new Operators. Recently, the company teased some of what you can expect from the game's next playable characters on PS4, Xbox One, and PC.

The Operators will make up a new Counter-Terrorism Unit--one of the classes of characters in the game. The new CTU will be the Chemical, Biological, Radiological, and Nuclear (CBRN) Threat Unit, specializing in counter-Weapons of Mass Destruction operations.