https://www.gamespot.com/articles/sieges-grim-sky-update-is-live-here-are-the-full-p/1100-6461547/

Rainbow Six Siege Year 3, Season 3--called Operation Grim Sky--is live and adds a bunch of new updates into the first-person shooter game. The most notable addition is two new operators, codenamed Clash and Maverick, but Operation Grim Sky implements several multiplayer improvements as well.

Both Defenders and Attackers get a new operator in Operation Grim Sky, and each shakes up Siege's meta in different ways. Clash is the first Defender to come equipped with a shield, which fully extends in front of her and fires a taser. She's perfect for crowd control and holding off a team of Attackers while her teammates regroup and come up with a new strategy. Maverick uses a custom blowtorch to breach through any surface. He can't easily create a man-sized entry point, but Maverick can cut a hole large enough for his teammates to shoot through. Given that his torch is nearly silent, this allows Attackers to quietly get eyes on the opposing team through a reinforced wall.