Description Leidos is on the lookout for a talented and motivated Endpoint Security Services Engineer and Administrator to enhance our innovative team. Your Role As an Endpoint Security Services Engineer and Administrator, you will not just maintain systems - you will transform them. Join a collaborative team dedicated to installing, configuring, and refining advanced security solutions that keep critical network infrastructure operating at its best. Your expertise will help evaluate emerging technologies while shaping the future of endpoint protection in a sensitive environment. Your Key Contributions: Manage the complete lifecycle of Endpoint Security Services (ESS) and its agents — from installation to optimization. Develop and implement custom ESS signatures and security policies. Monitor ESS proactively for intrusions, failures, and performance irregularities. Ensure secure and reliable operations of endpoints across all client and server environments. Troubleshoot deployment and policy rollout issues across local and remote systems. Conduct thorough threat analyses and create tailored security rules to combat advanced exploits and vulnerabilities. Provide detailed reporting on system health, event trends, and module performance. Aid in major updates and compliance initiatives, including mandatory STIG upgrades for Trellix. Participate in designing and evaluating network components and developing innovative technical solutions. Basic Qualifications: Active Top Secret clearance (SCI eligible). 8+ years of IT experience , including a minimum of 2 years focusing on ESS or equivalent experience. DOD 8570 IAT Level II certification or higher. Strong familiarity with Windows Server 2016+ and endpoint platforms like Trellix Agent, ENS FW, PA, DLP, RSD, and ePO. Excellent analytical skills and the capability to troubleshoot under pressure. Preferred Qualifications: TS/SCI clearance and DOD 8570 IAT Level III certification. Hands-on experience with RedHat Enterprise Linux, VMware, Microsoft Hypervisor, or RedHat VM Manager. Knowledge of SADR environments and ePO server maintenance. Completion of Basic and Advanced ESS DISA training. If you are eager to embrace one of the most critical roles in national security cyber defense, let's connect . This is your opportunity to take the lead in protecting essential systems at a key strategic location. Original Posting: June 30, 2025 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date no earlier than 3 days after the original posting date. Pay Range: Pay Range $89,700.00 - $162,150.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation. Additional factors considered in extending an offer include responsibilities of the job, education, experience, skills, and abilities, as well as internal equity and market alignment.