Senior Systems Administrator

Job ID 2612332Location Arnold, MO, USDate Posted 2026-05-07Category Information TechnologySubcategory Sys AdministratorSchedule Full-TimeShift Day JobTravel NoMinimum Clearance Required TS.SCIClearance Level Must Be Able to Obtain TS/SCI with PolyPotential for Remote Work ORA_ON_SITEDescriptionSAIC is seeking a Senior Systems Engineer to maintain and upgrade customer Linux, Windows, and cloud systems in a secure environment.Duties include but are not limited toPerform full system upgrades and repairs (Linux and Windows).Troubleshoot and repair operating system (OS) and hardware issues.Perform daily and weekly system backups and recovery while maintaining a log of system problems, errors, failures, and downtime metrics.Maintain hardware and software inventory lists and install software releases and upgrades.Evaluate and install security patches.Create and ensure operation of Active Directory and DNS.Create accounts and set up user specific access while maintaining group policies and procedures.Acquire system accreditation and ensures personnel comply with system security policies.Submit requirements within Service+ for any compute, storage, database, SharePoint, or Tableau infrastructure provisioning to be fulfilled by the UDS contractor.Work will be conducted at the customer site in Arnold, MOQualificationsRequired SkillsActive TS/SCI is requiredWilling and able to obtain a PolygraphKnowledge of the LINUX operating systemExperience with Windows Administration, for exampleActive DirectoryExperience with hardening Windows instances per DISA STIG or equivalentPowerShell scriptingLocal Group Policy Updates/ManagementUsers and Group ManagementWindows File SharesKnowledge of Amazon Web Services (AWS) or cloud architectureAmazon EC2 (create and update Amazon Machine Images)Amazon S3 (configure bucket policies, Amazon VPC endpoints)AWS LambdaAmazon CloudWatchAmazon VPC (manage Security Groups, Subnets, etc.)AWS Identity and Access Management (IAM)