Senior Systems Administrator

SAIC - Senior Systems Administrator in Arnold, Missouri, United States

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Senior Systems Administrator

Job ID: 2612332

Location: Arnold, MO, United States

Date Posted: May 7, 2026

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: On-Site

Benefits: Click here

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Job Description

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)

Overview

SAIC accepts applications on an ongoing basis and there is no deadline.

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.

We are approximately 23,000 strong; driven by mission, united by purpose, and inspired by opportunities. SAIC is an Equal Opportunity Employer. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.3 billion. For more information, visit saic.com. For ongoing news, please visit our newsroom.

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