Mid-Level System Administrator

Company: Leidos
Location: Annapolis Junction
Posted on: April 1, 2026

Job Description:

Leidos has a new and exciting opportunity for a Mid-Level System Administrator in our Intel Sector's Cyber & Analytics Business Area (CABA) . Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos , we offer competitive benefits , including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. Join us and make a difference in National Security! Job Summary Leidos is seeking a Mid-Level System Administrator to join a high-impact, multi-agency program serving the United States Space Force (USSF) / Space Systems Command (SSC), the United States Air Force (USAF), and other critical mission stakeholders. The selected individual will play key role in enhancing, testing, and deploying a large-scale Satellite Communications (SATCOM) system to an existing infrastructure. The ideal candidate brings deep expertise in public key infrastructure (PKI) and key management, excels at complex problem solving, and has a strong record of delivering results as part of a high-performing team in a fast-paced Agile Development environment. This position offers a unique opportunity to enhance the resilience and cybersecurity of mission-critical communications that protect our nation. Primary Responsibilities: Provide full lifecycle system support, including end-to-end integration and deployment activities. Support integration of large-scale systems and major system components within a complex, geographically distributed network environment. Conduct system and network vulnerability assessments and support the implementation of security best practices and hardening measures. Perform hands-on system administration tasks such as deployment of software, vendor firmware, COTS, and FOSS solutions. Maintain and enhance internal system functionality and performance, including interoperability with external systems and protection of critical data sets. Collaborate closely with cross-functional technical teams (systems, software, test, etc.) in an Agile environment to plan, design, integrate, and deliver system capabilities. Administer and support Linux and/or Windows-based components in a large high-performance computing environment. Troubleshoot complex hardware and software issues by analyzing packet captures, reviewing event and audit logs, and identifying root causes of abnormal system behavior. Support both development and production environments by applying software builds, updating application versions, deploying security patches, and adjusting configuration settings as required. Provide support for deployment activities, including software and hardware installation and integration. Coordinate with internal Leads to define acceptable outage windows and execute maintenance activities with minimal impact to operations. Create and maintain system documentation, including deployment procedures, configuration baselines, and system configuration guides. Leverage current automation technologies and scripting to streamline system administration, configuration management, and monitoring tasks. Basic Qualifications: Bachelor’s Degree in Computer Science, Information Systems, Engineering Science, System Engineering, or a related field and at least 8 years of related experience. Additional experience may be substituted for a Degree. Must have at least 5 years of experience troubleshooting large complex IT systems, software, servers, and networks . Must have experience or strong familiarity regarding virtualization experience via any industry standard hypervisor and/or experience deploying application software including application servers. Experience deploying application software, including application servers. Must have past or current in-depth experience working on multiple infrastructure networks simultaneously. Experience with system analysis, risk analysis, and/or vulnerability assessments. Must have experience developing creative solutions to technical issues that arise in real time. Must have experience thoroughly tracking and documenting technical issues. Must have experience working with Development, Integration, and Production environments before systems deployment. Ability to plan and prioritize tasking based on mission and team needs in a fast-moving environment. Demonstrated ability to work independently and as part of a team while delivering high-quality results. Strong verbal and written communication skills, with the ability to communicate technical information clearly and effectively. Ability to work extended hours when necessary to support uptime on high-visibility production systems. Ability to travel on occasion to non-hostile locations. This position is based near Columbia, Maryland, with alternative duty locations in San Diego, California, Englewood, Colorado, or Huntsville, Alabama. Relocation assistance may be available for qualified candidates. Clearance Required: Must have TS/SCI with Polygraph. Preferred Qualifications: Systems-of-systems integration and development experience. Windows Server 2008, 2012, 2016, 2022 and/or Server Core administration experience. Expertise with firewall technologies and configuration best practices. Powershell and PowerCLI experience with knowledge of Python or REST APIs. Experience with one or more of the following: Wireshark, Microsoft MDT, Centos & Redhat, SALT, Puppet, CHEF, Ansible, iSCSI and Flash SANs, Solarwinds usage and deployment. Familiarity with complex network systems, to include firewalls, Load Balancers, NIDS, NAT, PAT, VPC and complex ACLs on multiple hardware architectures including Cisco Nexus and Cisco Catalyst lines. At Leidos , the opportunities are boundless. We challenge our staff with interesting assignments that allow them to thrive professionally and personally. For us, helping you grow your career is good business. We look forward to learning more about you – Apply today! If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares. Original Posting: March 18, 2026 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 of no earlier than 3 days after the original posting date as listed above. Pay Range: Pay Range $92,300.00 - $166,850.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Keywords: Leidos, Bethesda , Mid-Level System Administrator, IT / Software / Systems , Annapolis Junction, Maryland