Source: Mikko Lemola via ShutterstockAT&T completed its divestiture of its cybersecurity services group and formed a joint venture with more than 1,000 employees in ten countries that will focus on managed cybersecurity services.The new company, LevelBlue, includes AT&T's managed service business, cybersecurity consulting business, and the assets from AT&T's purchase of AlienVault in 2018, such as the Open Threat Exchange (OTX) community of security professionals. Services will include managed f...