Trellix

Trellix is the cybersecurity company (formed from the merger of McAfee Enterprise and FireEye) whose products power the DoD's Endpoint Security Solution (ESS). In DoD environments, you'll encounter Trellix tools including endpoint protection, host intrusion prevention, data loss prevention, and endpoint detection and response.

Trellix replaced references to 'McAfee' and 'HBSS' in DoD terminology. When someone references Trellix in a DoD context, they're typically talking about the endpoint security tools installed on government workstations and servers.