Sys Administrator

SAIC; Arnold (MO); On-site; USD 120,000 - 160,000; Full time

Job summary

SAIC is seeking a Systems Administrator to support our customer at Arnold, MO. The role requires active TS/SCI clearance with poly and will involve Linux and Windows server administration, AD/DNS, and cloud familiarity.

You will perform upgrades, troubleshoot OS and hardware, manage backups, patch security, and maintain inventories. Strong scripting with PowerShell and experience with AWS are valued. This is a full-time, on-site position with potential for remote work not available.

Qualifications

• Active TS/SCI is required to be considered for this role.
• Willingness to obtain a Polygraph.
• Knowledge of the Linux operating system.
• Experience with Windows administration including Active Directory, DNS, and Group Policy.

Responsibilities

• Perform full system upgrades and repairs (Linux and Windows).
• Troubleshoot and repair OS and hardware issues.
• Back up and recover daily/weekly, logging problems and downtime.
• Maintain hardware and software inventories and install upgrades.
• Evaluate and install security patches.
• Create and manage Active Directory and DNS.
• Create user accounts and manage access with group policies.
• Submit provisioning requirements for compute/storage to be fulfilled.

Skills

Linux

Windows administration

PowerShell

Active Directory

DNS

Group policy

User management

AWS

TS/SCI clearance

Polygraph

Tools

AWS

Windows Server

Job description

Minimum Clearance Required TS.SCI

Job ID 2617874

Location Arnold, MO, US

Date Posted 2026-10-19

Category Information Technology

Subcategory Sys Administrator

Schedule Full-Time

Shift Day Job

Travel No

Minimum Clearance Required TS.SCI

Clearance Level Must Be Able to Obtain TS/SCI with Poly

Potential for Remote Work ORA_ON_SITE

Description

SAIC® is a premier Fortune 500® mission integrator focused on advancing the power of technology and innovation to serve and protect our world. Our robust portfolio of offerings across the defense, space, civilian and intelligence markets includes secure high-end solutions in mission IT, enterprise IT, engineering services and professional services. We integrate emerging technology, rapidly and securely, into mission critical operations that modernize and enable critical national imperatives.

SAIC is seeking a Systems Administrator to support our customer at Arnold, MO. Requirements are to

Duties may include

• Perform 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.

Qualifications

Required Skills and Experience

• Active TS/SCI is Required to be considered for this role
• Able and willing to obtain a Polygraph
• Knowledge of the LINUX operating system
• Experience with Windows Administration, for example
  • Active Directory
  • Experience with hardening Windows instances per DISA STIG or equivalent
  • PowerShell scripting
  • Local Group Policy Updates/Management
  • Users and Group Management
  • Windows File Shares
• Knowledge of Amazon Web Services (AWS) or cloud architecture
  • Amazon EC2 (create and update Amazon Machine Images)
  • Amazon S3 (configure bucket policies, Amazon VPC endpoints)
  • AWS Lambda
  • Amazon CloudWatch
  • Amazon VPC (manage Security Groups, Subnets, etc.)
  • AWS Identity and Access Management (IAM)

Target salary range $120,001 - $160,000. The estimate displayed represents the typical salary range for this position based on experience and other factors.