Endpoint Security as a Service (ESS) Engineer

Leidos • Washington, DC

3h

About The Position

Leidos is seeking a skilled and driven Endpoint Security as a Service (ESS) Engineer and Systems Administrator to join our team at the Washington Navy Yard — where innovation meets mission. As an ESS Engineer and Systems Administrator, you won’t just maintain systems — you’ll elevate them. You’ll be part of a collaborative team that installs, configures, and fine-tunes advanced security solutions to ensure critical network infrastructure runs at peak performance. You’ll also evaluate emerging technologies and shape the future of endpoint protection across a highly sensitive environment. You will ensure that our systems comply with the latest security patches and configurations.

Requirements

• Active Top Secret clearance (SCI eligible).
• 8+ years of IT experience , including 2+ years focused on ESS (or equivalent experience in lieu of degree).
• DOD 8570 IAT Level II certification or higher.
• Expertise in Windows Server 2016+ and endpoint platforms such as Trellix Agent, ENS FW, PA, DLP, RSD, and ePO.
• Strong analytical skills with a knack for troubleshooting under pressure.

Nice To Haves

• TS/SCI clearance and DOD 8570 IAT Level III certification.
• Hands-on experience with RedHat Enterprise Linux, VMware, Microsoft Hypervisor, or RedHat VM Manager.
• Familiarity with SADR environments and maintaining ePO servers.
• Completion of Basic and Advanced ESS DISA training.

Responsibilities

• Overseeing the full lifecycle of the ESS and its agents — install, manage, maintain, and optimize.
• Creating and deploying custom ESS signatures and policies.
• Proactively monitoring ESS for intrusions, failures, and performance anomalies.
• Ensuring reliable and secure endpoint operations across all clients and servers.
• Troubleshooting ESS deployments and policy rollouts across local and remote systems.
• Conducting threat analysis and crafting custom security rules tailored to advanced exploits and vulnerabilities.
• Providing in-depth reporting on system health, event trends, and module performance.
• Supporting major updates and compliance efforts, including STIG-mandated Trellix upgrades.
• Helping design and evaluate network components and develop cutting-edge technical solutions.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed
• Number of Employees: 11-50 employees