System Administrator-Linux

Leidos•Annapolis Junction, MD

About The Position

System Administrator - Linux Leidos has a new and exciting opportunity for a System Administrator - Linux in our National Security Sector's (NSS) 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! Primary Responsibilities The selected individual will be responsible for monitoring infrastructure systems, applications, and processes, and for ensuring that all issues are identified, tracked, and resolved in a timely manner. She/he will provide support for all infrastructure systems and will respond to hardware and software incidents and work with senior system administrators, at times remotely from other locations. Other responsibilities include: Quickly responding to IT Help Desk calls and emails in a professional manner; ensuring issues are resolved and/or escalated to the appropriate teams; and following up with teams and users to ensure issues are satisfactorily remediated. Identifying, troubleshooting, and correcting hardware and software issues including network connectivity. Utilizing enterprise monitoring solutions to identify alarms that have been triggered against the various environments. Proactively contacting customers when infrastructure processes are significantly delayed or may impact their ability to complete a business function on time. Executing the process for managing information assurance vulnerability alerts (IAVAs) and system security scanning for equipment suites in accordance with the System Security Plans for these systems to rapidly and accurately identify and remediate IAVAs. Initiating IAVA responses and system security scans, completing remediation, and extending IAVA patches and security updates on various IT and network systems. Providing technical assistance to companion work groups in support of overlapping projects such as implementing IT enhancements and optimizing systems. Maintaining good inter-departmental relations, communicating with users, and publishing status of system outages. Participating in the creation and ongoing maintenance of documentation to ensure clear, concise and accurate information is readily available to assist with incident resolution. 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. careers.leidos.com/CONMD CSSKEY CONMD At Leidos, we don’t want someone who "fits the mold"—we want someone who melts it down and builds something better. This is a role for the restless, the over-caffeinated, the ones who ask, “what’s next?” before the dust settles on “what’s now.” If you’re already scheming step 20 while everyone else is still debating step 2… good. You’ll fit right in. Original Posting: January 5, 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.

Requirements

BS degree in a technical field and at least 8 years of relevant experience. Additional experience may be substituted for a degree
Must have at least 3 years of direct, hands-on experience providing assistance to users in an IT customer service capacity
Must have at least 3 years of experience working on an IT/software program that utilizes complex equipment/systems (ex. Network Switches, Routers, LANs, & cabling, Windows/Linux operating systems, VMware, etc.)
Must have experience installing, updating, and upgrading Linux Operating Systems (OS)
Must have experience with utilities used to manage Linux OS disk file systems
Must have experience analyzing and implementing Security Technical Implementation Guide (STIG) requirements in Linux OS
Must have experience with utilities used to create and configure network connections in Linux OS
Must have experience implementing Windows Active Directory User Authentication in Linux OS
Must be proficient in reading and modifying User/Group permissions in Linux OS
Must be proficient in reading, analyzing, and troubleshooting errors within Linux OS
Must have experience with IT system optimization, monitoring, and technical set-up and troubleshooting
Must have experience with Data Center design and configuration (e.g. rack and stack, power, placement, etc.)
Must have experience gathering data for and documenting technical processes
Must have experience documenting IT issues and providing detailed and comprehensive status reports and follow-ups
Must have experience Analyzing and addressing IAVAs/CVEs (response and remediation, system security scans, extending IAVA patches and security updates on IT and network systems, etc)
Must be committed to adopting and adhering to best practices including compliance with maintenance windows and change control procedures
Must possess strong analytic abilities and must be meticulous and careful in their work
Must be an independent thinker capable of working independently as well as within a team
Must be able to respond to emergency system administration, operations, and maintenance problems, on a limited as-needed on-call basis
Must be able to travel up to 25% of the time to local program locations (not overnight). Additional travel to CONUS and OCONUS location(s) may also be required (overnight)

Nice To Haves

Experience with security standards, software architectures, and Network security technologies (Multiple Domain, PKI, SSP, Vulnerability Assessment, etc.)
Experience working with Enterprise Domain Services
Experience building and deploying Virtual Machines within an On-Premises Data Center
Experience with scripting and/or automation tools
Experience reading, analyzing, and addressing security vulnerabilities discovered from automated scanning tools
Experience supporting a large, complex software configuration management and development program
Experience working in an Agile Development Environment or on an Agile Team

Responsibilities

monitoring infrastructure systems, applications, and processes, and for ensuring that all issues are identified, tracked, and resolved in a timely manner
provide support for all infrastructure systems and will respond to hardware and software incidents and work with senior system administrators, at times remotely from other locations
Quickly responding to IT Help Desk calls and emails in a professional manner; ensuring issues are resolved and/or escalated to the appropriate teams; and following up with teams and users to ensure issues are satisfactorily remediated
Identifying, troubleshooting, and correcting hardware and software issues including network connectivity
Utilizing enterprise monitoring solutions to identify alarms that have been triggered against the various environments
Proactively contacting customers when infrastructure processes are significantly delayed or may impact their ability to complete a business function on time
Executing the process for managing information assurance vulnerability alerts (IAVAs) and system security scanning for equipment suites in accordance with the System Security Plans for these systems to rapidly and accurately identify and remediate IAVAs
Initiating IAVA responses and system security scans, completing remediation, and extending IAVA patches and security updates on various IT and network systems
Providing technical assistance to companion work groups in support of overlapping projects such as implementing IT enhancements and optimizing systems
Maintaining good inter-departmental relations, communicating with users, and publishing status of system outages
Participating in the creation and ongoing maintenance of documentation to ensure clear, concise and accurate information is readily available to assist with incident resolution