Senior Systems Administrator

Job ID: 2612332

Location: Arnold, MO, US

Date Posted: 2026-05-07

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 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 to:

• 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.
  
  

Work will be conducted at the customer site in Arnold, MO

Qualifications

Required Skills:

• Active TS/SCI is required
• Willing and able 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)
  

SAIC is a premier technology integrator providing full life cycle services and solutions in the technical, engineering, intelligence, and enterprise information technology markets. SAIC is Redefining Ingenuity through its deep customer and domain knowledge to enable the delivery of systems engineering and integration offerings for large, complex projects. SAIC's approximately 15,000 employees are driven by integrity and mission focus to serve customers in the U.S. federal government. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $4.5 billion. For more information, visit saic.com. For information on the benefits SAIC offers, see .