Description
Leidos is seeking a System Administrator for the enterprise PKI program, and their associated cloud infrastructures located on a secure network. The System Administrator will work with a team of engineers, developers, cybersecurity engineers, system architects, and testers.
Core business hours are typically from 9 AM – 3 PM, five days a week. Hours can be flexible for either early arrivals, and/or late departures. Some after hours or weekend work may be required to accommodate system deployments and upgrades.
While not required, it is highly desirable for the Candidate to have knowledge of Public Key Infrastructure (PKI) and understand key concepts like digital certificates, Certificate Authorities (CAs), Registration Authorities (RAs), key management practices, cryptographic algorithms, certificate revocation procedures, and trust models. Additionally, the ability to follow standard operating procedures to manage a robust system to issue, manage, and revoke digital certificates while ensuring the integrity and authenticity of users and entities within a network is desirable. Candidates who do not have all these abilities, but have the ability to learn them, will be considered.
Primary Responsibilities
Performing regular maintenance of cloud infrastructure resources, to include patching, configuration, upgrading as needed
Security Patching
Working with the team’s security engineer to address, mitigate security findings stemming from system security scans
Support of Servers in an AWS environment
Monitor CloudWatch dashboards other tools to ensure systems are performing as designed
Ensures the mission critical application remains operational 24/7
Required Qualifications
Must have an active TS/SCI with Polygraph
BS degree and at least 8 years of relevant experience
Experience in using Linux-based operating systems
Experience running Bash scripts – will be expected to become proficient in updating existing bash scripts and writing additional bash scripts
Must have experience with security accreditation process
Must have experience with the Cloud / Amazon Web Services
Must be able to support System Administration/Privileged Access duties including an on-call rotation for a week approximately every two months
Excellent oral and written communications skills
Detail-oriented mindset
Experience interacting with cross functional project teams including Software Development, System Engineering/ Verification and Validation, Security, Compliance and Quality Assurance
Experience working in Agile environments
Experience with GitHub
Experience with AWS Console
Ability to read and perform complex software and infrastructure deployment instructions
Desired Qualifications
Experience with Public Key Infrastructure (PKI) and understand key concepts like digital certificates, Certificate Authorities (CAs), Registration Authorities (RAs), key management practices, cryptographic algorithms, certificate revocation procedures, and trust models
Experience with LDAP technologies
Experience with Elastic tools (Elasticsearch, Logstash, Kibana, and Beats)
Experience working with DevOps CI/CD related technologies (Github, Jenkins, Puppet, Docker, Rundeck, etc.)
Experience with AWS CLI, and manage services utilizing cloud services to build infrastructure as a code in an automated fashion
Network engineering troubleshooting between Cloud environments and non-Cloud environments
Solid understanding of Web Application Firewall (WAF) configuration and management
Experience with networking (e.g., ports, routing tables, subnets, VPNs, firewalls, routers, etc.) to include design, integration and troubleshooting issues
Minimum of one AWS Certification from the AWS Associate level (AWS Certified Architect Associate, AWS Certified Developer Associate, or AWS Certified SysOps Administrator Associate)
2+ years of C2S experience
Cloud formation
Managing complex Sponsor relationships and requirements gathering
Experience with IAM / IdAM / ICAM delivery systems, Authentication, Authorization, and/or Attributes
Experience with Tomcat
Experience with Container implementations
Experience managing HSMs
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:
April 29, 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.
About Leidos
Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.
Pay and Benefits
Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.
Securing Your Data
Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.
Commitment to Non-Discrimination
All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.
