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1–2 jobs· newest first

Information Systems Security Officer
APOGEE RESEARCH LLC · Arlington, US
$114K–$171KOn-site · Full-time
Sr. System Administrator
RTX · Andover, US
$76K–$144KOn-site · Full-time · Senior

+10K new in the last hour

Information Systems Security Officer

APOGEE RESEARCH LLC · Posted Nov 9, 2026

Arlington, Virginia, United States
On-site
Full-time
$114K–$171K per year

3+ years

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Information Systems Security Officer (ISSO) responsible for ensuring operational security of assigned information systems within DoD multi-level security environments.

Compensation

$114,133 - $171,200

Responsibilities

Ensure users follow established information security policies and procedures to protect, operate, maintain, and dispose of systems and data in accordance with internal security policies and DoD regulations.
Interpret, review, maintain information Systems Security Plans (SSPs), Security Control Traceability Matrix (SCTM), Risk Assessment Reports, Security Control Assessment Reports, and authorizations in accordance with DoD mandated policies.
Participate in and support assessments of various classified and Controlled Unclassified Information networks.
Troubleshoot user accounts and network issues, perform backups, assist with Assured File Transfers, ensure the integrity of security configurations, and the removal of decommissioned information systems.
Identify information systems vulnerabilities, recommend and or implement countermeasures for controlled and secure network resources.

Requirements

Nice to have: Red Hat
Nice to have: Linux
Nice to have: Windows Server
Nice to have: Windows
Nice to have: Virtualization

Skills

Information Systems Security Officer DoD security SSP SCTM Risk Assessment Security Control Assessment Classified networks User account troubleshooting Backups Assured File Transfers Security configurations Decommissioned systems Vulnerability management RMF Continuous Security Monitoring Audit logs Cyber awareness training Security audits Documentation Incident response POA&M Red Hat Linux Windows Server Windows Virtualization

Benefits

Health insurance
Dental insurance
Vision insurance
Life insurance
Disability insurance

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Sr. System Administrator

RTX · Posted Nov 9, 2026

Andover, Massachusetts, United States
On-site
Full-time · Senior
$76K–$144K per year
2+ years

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Provide IT systems administration in a heterogeneous Microsoft Windows and RedHat Enterprise Linux environment supporting classified information systems.

Compensation

US-MA-ANDOVER-AN5 ~ 356 Lowell St ~ AN5 BRISTOL BLDG

Responsibilities

Provide IT systems administration in a heterogeneous Microsoft Windows and RedHat Enterprise Linux environment.
Understanding and knowledge of Windows Server internals or Linux fundamentals to include DNS, DHCP, AD, and server replication methods.
Work with Cybersecurity professionals to maintain security requirements.
Provide documentation and training on advanced IT processes and procedures.

Requirements

University Degree or equivalent experience
Nice to have: MECM/SCCM
Nice to have: PXE boot services
Nice to have: OS imaging
Nice to have: automated software deployment frameworks

Skills

Windows Server RedHat Enterprise Linux DNS DHCP Active Directory

system hardening

security configurations

Microsoft Windows

Benefits

medical
dental
vision
life insurance
short-term disability

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