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Information Security Engineer - Linux Administrator

American Systems Corporation

Middletown, RIFull-time$85–125K/yrPosted 1mo agoStill listed today

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At a glance

Compensation
$85–125K/yr
Location
Middletown, RI
Schedule
Full-time
Work Authorization
US work authorization required

Olive lists jobs from US employers, including remote roles you can work from the United States.

Requirements

Credentials this posting asks for.

Secret clearance, required

Job overview

AMERICAN SYSTEMS seeks a journeyman-level Linux Server Administrator for a mission-critical Department of Defense environment. The role administers and secures Linux-based systems, monitors performance, troubleshoots issues, and supports maintenance, compliance, and incident response. It is full-time and on-site in Middletown, Rhode Island, with occasional travel to customer or program locations. Familiarity with undersea platform systems or prior submarine fleet experience is highly desired.

Skills & qualifications

RequiredNice to have

Skills

Linux Administration, requiredLinux Distributions, requiredLinux Installation and Configuration, requiredLinux Patching and Troubleshooting, requiredUser and Permissions Management, requiredTCP/IP Networking, requiredNetwork Services, requiredStorage Management, requiredBackup Operations, requiredShell Scripting, requiredSystem Monitoring, requiredLogging, requiredPerformance Analysis, requiredSecurity Hardening, requiredVulnerability Remediation, requiredProblem Solving, requiredTechnical Documentation, requiredCommunication, requiredIndependent and Collaborative Work, requiredUndersea Platform Systems, nice to haveSubmarine Fleet Experience, nice to have

Qualifications

U.S. Citizenship, requiredActive DoD Secret Clearance, requiredBachelor's or Equivalent Experience, required3 Years Relevant Experience, requiredJourneyman Linux Administration Experience, required

Benefits

Medical Insurance
Paid Time Off
401(k) Match
Tuition Assistance

Full job description

Overview

AMERICAN SYSTEMS is an employee-owned federal government contractor supporting national priority programs through our strategic solutions in the areas of Information Technology, Test & Evaluation, Program Mission Support, Engineering & Analysis, and Training.

We are seeking a journeyman-level Linux Server Administrator to support the installation, configuration, operation, security, and maintenance of Linux-based systems in a mission-critical Department of Defense environment. The successful candidate will monitor system performance, troubleshoot technical issues, perform system hardening and patching, manage user access, and maintain system documentation.

This position requires full-time, on-site work in Middletown, Rhode Island, and may require occasional travel to customer or program locations.

Responsibilities

  • Install, configure, administer, and maintain Linux servers, operating systems, and supporting infrastructure.

  • Monitor system availability, performance, capacity, security, and resource utilization.

  • Diagnose and resolve server hardware, operating system, storage, application, and network connectivity issues.

  • Perform operating system patching, software updates, configuration changes, and routine system maintenance.

  • Secure and harden Linux systems in accordance with organizational policies, DoD requirements, and applicable Security Technical Implementation Guides (STIGs).

  • Manage user accounts, groups, permissions, privileged access, authentication, and system audit logs.

  • Configure and maintain services such as SSH, DNS, NFS, web services, time synchronization, and centralized logging.

  • Support vulnerability scanning, security assessments, compliance reviews, and remediation activities.

  • Implement and verify backup, restoration, disaster recovery, and continuity-of-operations procedures.

  • Use scripting and automation tools to improve the efficiency and consistency of administrative tasks.

  • Assist with incident response, root-cause analysis, and corrective-action implementation.

  • Maintain system configuration records, operating procedures, diagrams, inventories, and troubleshooting documentation.

  • Coordinate with cybersecurity, network, software, engineering, and customer support teams.

  • Participate in scheduled maintenance activities and provide after-hours support when required.

  • Travel occasionally to customer or program sites.

Qualifications

  • U.S. Citizenship.

  • Active DoD SECRET security clearance.

  • Bachelor’s degree in information technology, computer science, cybersecurity, engineering, or a related discipline and approximately three years of relevant experience; additional relevant experience, education, or technical training may be considered in lieu of a degree.

  • Journeyman-level experience administering Linux systems in enterprise, engineering, laboratory, or mission-support environments.

  • Working knowledge of one or more Linux distributions, such as Red Hat Enterprise Linux, Rocky Linux, AlmaLinux, CentOS, Ubuntu, or SUSE.

  • Experience with:

  • Linux installation, configuration, patching, and troubleshooting

  • User, group, file system, and permissions management

  • TCP/IP networking and common network services

  • Storage, logical volumes, file systems, and backup operations

  • Shell scripting using Bash or a comparable scripting language

  • System monitoring, logging, and performance analysis

  • Security hardening and vulnerability remediation

  • Ability to analyze technical problems, identify root causes, and implement effective solutions.

  • Ability to create and maintain clear technical documentation.

  • Strong verbal and written communication skills.

  • Ability to work independently and collaboratively in a controlled, on-site environment.

  • Familarity with undersea platform systems or prior submarine fleet experience is highly desired.

Pay Transparency Statement AMERICAN SYSTEMS is committed to pay transparency for our applicants and employee-owners. The salary range for this position is USD $85,000.00/Yr. - USD $125,000/Yr. Actual compensation will be determined based on several factors permitted by law. AMERICAN SYSTEMS provides for the welfare of its employees and their dependents through a comprehensive benefits program by offering healthcare benefits, paid leave, retirement plans, insurance programs, and education and training assistance. EEO Statement EEO Race/Sex/Disability Status/Veteran Status

How this job compares

Set against the 2,494 open Systems Administrator jobs on Olive Jobs, counted November 11, 2026.

Pay
  • This posting$85–125K/yr
  • US median$94–148K/yr1,563 salary ranges

This range's midpoint, $105K, is 14% below the US median midpoint ($122K) — in the middle half of Systems Administrator salary ranges across the US.

Openings
Olive Jobs lists 15 open Systems Administrator jobs in Rhode Island and 2,494 across the US. 5% of them nationwide are listed as remote or flexible.
Hiring the most across the US
Experience
This posting asks for at least 3 years of experience; Systems Administrator postings that state a minimum ask for 5 years at the median (2,074 postings).
Education
359 of the 2,494 open Systems Administrator jobs (14%) ask for a bachelor's degree or higher.

Counted across the open, public US postings on Olive Jobs on November 11, 2026. Pay medians are the middle values of the low ends and of the high ends of postings that list both ends of a range in the same cadence (a yearly salary or an hourly rate); a range's midpoint is halfway between its ends. Pay and experience figures resting on fewer than 20 postings are left out.

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