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Senior Systems Administrator

Full Time Remote

Summary

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)

About SAIC

SAIC

SAIC (Science Applications International Corporation) is one of the largest technology integrators supporting the U.S. Department of Defense, intelligence community, and federal civilian agencies. The company delivers mission-critical services across engineering, IT modernization, cybersecurity, intelligence, and systems integration, helping government customers operate and secure complex national security infrastructure at scale.

For job seekers, SAIC offers a wide range of career opportunities in software engineering, cybersecurity, cloud computing, systems engineering, data analytics, intelligence analysis, program management, and mission support. The company is especially attractive to veterans, cleared professionals, and technologists seeking stable, long-term roles embedded in high-impact government programs across defense and intelligence missions.

Unlike defense manufacturers that build physical platforms, SAIC focuses on integrating, modernizing, and operating the digital and information systems that support government missions. Employees often work on large-scale federal programs involving network modernization, space and satellite systems support, cyber defense operations, and advanced data-driven decision-making tools used across defense and intelligence agencies.

As federal agencies continue investing heavily in cybersecurity, AI, cloud infrastructure, and digital transformation, SAIC remains one of the most important employers in the government services sector. For professionals seeking mission-driven work with strong stability and exposure to complex national security programs, SAIC continues to stand out as a leading destination in defense and federal technology services.

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