Referso Jobs

Principal CNO Developer

Nightwing · Posted Oct 1, 2026

Open

Palm Bay, Florida, United States
On-site
Full-time · Principal
10+ years

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Principal CNO Developer

Nightwing · Posted Oct 1, 2026

Open

Palm Bay, Florida, United States
On-site
Full-time · Principal
10+ years

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Senior DevOps Engineer

Fusion Technology · Posted Nov 13, 2026

Open

Remote, United States
Remote
Full-time · Senior
7+ years

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Senior DevOps Engineer responsible for managing and automating infrastructure, configuration, and deployment across cloud and on-premises environments.

Compensation

Fusion Technology values its employees and works hard to ensure proper care for them and their families. We desire to compensate employees in a competitive, motivational, fair, and equitable way with other employers in the marketplace. Salary is only one component of employee compensation but an integral part of recruiting and retaining qualified employees. However, at Fusion Technology, we take a comprehensive approach and consider each employee's needs to tailor a compensation plan that provides financial security and peace of mind. Our competitive package includes a best-in-class matching 401K program, a comprehensive healthcare plan through Cigna, a competitive employer contribution to a health savings account, vision and dental plans, life insurance, short- and long-term disability, and personal leave, in addition to paid certifications and training.

Responsibilities

Design, implement, and maintain CI/CD pipelines using Ansible and Git
Provision and manage AWS resources (EC2, S3, Load Balancers, Security Groups)
Configure and monitor Linux servers (CentOS, RedHat) and RedHat Satellite
Deploy and manage containerized and non-containerized applications
Implement monitoring and alerting with Nagios, Grafana, InfluxDB

Requirements

Bachelor's Degree in a related field
Nice to have: Node.js

Skills

Linux CentOS RedHat

Senior UNIX System Engineer

Peraton · Posted Nov 13, 2026

Open

Radford, Virginia, United States
Full-time · Senior
$112K–$179K per year
12+ years

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Lead and maintain enterprise-class UNIX/Linux systems for the U.S. Army Program Executive Office Enterprise, ensuring high availability, security, and performance across multiple data center locations.

Compensation

$112,000 - $179,000. This represents the typical salary range for this position. Salary is determined by various factors, including but not limited to, the scope and responsibilities of the position, the individual’s experience, education, knowledge, skills, and competencies, as well as geographic location and business and contract considerations. Depending on the position, employees may be eligible for overtime, shift differential, and a discretionary bonus in addition to base pay.

Responsibilities

Manage, maintain, deploy, troubleshoot, and support RHEL/Oracle Linux and Solaris servers across a mixed customer environment.
Plan, execute, and implement new system hardware and software, and lead new HW/SW integrations.
Monitor and tune system performance, and keep day-to-day server operations running smoothly.
Harden servers (STIG, SELinux, firewalld) and report on overall security and operational status.
Produce utilization reports with existing tools to identify problems and drive corrective actions.

Requirements

Bachelor's in Computer Science or IT
Associate's in Computer Science or IT
Master's in Computer Science or IT
PhD in Computer Science or related field
Nice to have: Ansible

Skills

UNIX/Linux Systems Administration

Intégrateur systèmes Linux/Windows H/F

Scalian · Posted Nov 13, 2026

Open

Brest, Brittany, France
On-site
Full-time · Senior
€35K–€40K per year
5+ years

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Intégrateur Systèmes Linux / Windows H/F

Compensation

Rémunération : 35K€ - 40K€

Responsibilities

Déploiement et gestion de machines virtuelles dans les environnements Legacy.
Accompagnement des équipes projets dans l’intégration et l’évolution des environnements.
Participation aux mises en production et gestion des demandes de création/modification d’environnements.
Contrôle de la conformité des environnements via les outils internes (ALM) et application des standards techniques et sécurité.
Contribution au durcissement des systèmes et à l’amélioration des processus d’exploitation.

Requirements

Nice to have: industrial complex experience
Nice to have: ITIL

Skills

Linux Windows Ansible AWX Control-M Splunk NetBackup

HPC Linux Systems Administrator (MSIC)

COLSA · Posted Nov 13, 2026

Open

Huntsville, Alabama, United States
On-site
Full-time · Mid
0–12 years

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Maintain and optimize the secure, high-performance computing (HPC) infrastructure supporting critical national security missions, managing Linux servers, HPC clusters, and containerized environments.

Responsibilities

Drive the secure deployment and lifecycle management of Linux workstations, enterprise servers, and HPC clusters
Efficiently administer local and remote filesystems, ensuring data integrity and high-speed access across the network
Eliminate manual toil by developing sophisticated automation scripts using Shell and Python
Implement and manage robust security layers, including advanced firewall configurations and fine-tuned SELinux policies
Drive system consistency and rapid deployment using Ansible for configuration management and automation

Requirements

Associate’s degree or higher in Cybersecurity, Information Technology, or a related field
Nice to have: HPC Clusters
Nice to have: Nutanix
Nice to have: KVM
Nice to have: Citrix

Skills

Linux systems engineering RHEL Rocky Shell scripting

Senior Platform Engineer – TS/SCI

Tenica and Associates LLC · Posted Nov 12, 2026

Open

Chantilly, Virginia, United States
Senior
6+ years

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Senior Platform Engineer specializing in enterprise Linux infrastructure, Kubernetes, container orchestration, and platform automation for mission‑critical, on‑premises, isolated, and air‑gapped environments.

Responsibilities

Design, deploy, configure, and maintain enterprise Kubernetes platforms operating within on‑premises and isolated environments.
Perform advanced Linux systems administration, including systemd service management, kernel optimization, and SSH configuration.
Install, configure, and troubleshoot container runtimes such as containerd and CRI‑O.
Manage Linux namespaces, cgroups, and operating system isolation mechanisms.
Implement Linux security hardening using SELinux, AppArmor, and applicable security profiles.

Requirements

Master's degree in a Science, Technology, Engineering, or Mathematics (STEM) field with 6 or more years of relevant experience
Bachelor's degree with 8 or more years of relevant professional experience

Skills

Kubernetes Linux container runtimes containerd CRI‑O

Cloud Infrastructure Engineer

Peraton · Posted Nov 12, 2026

Open

Chantilly, Virginia, United States
On-site
Full-time · Mid
$112K–$179K per year
3–7 years

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Support enterprise cloud and infrastructure initiatives within a collaborative, high-performing systems engineering team. This role involves designing, building, deploying, and maintaining cloud and on-premise infrastructure using modern automation and configuration management practices.

Compensation

Target Salary Range $112,000 - $179,000. This represents the typical salary range for this position. Salary is determined by various factors, including but not limited to, the scope and responsibilities of the position, the individual’s experience, education, knowledge, skills, and competencies, as well as geographic location and business and contract considerations. Depending on the position, employees may be eligible for overtime, shift differential, and a discretionary bonus in addition to base pay.

Responsibilities

Support system lifecycle activities across development, integration and test, deployment, and operations
Build and maintain highly available, high-performance networked systems in a team-oriented environment
Deploy cloud instances and applications, leveraging automation tools to streamline processes and improve efficiency
Develop and maintain Ansible playbooks for automated deployment and system patching within large-scale environments
Create systems engineering documentation including concepts of operation, requirements, specifications, and interface documents

Requirements

Associate’s degree in engineering, Computer Technology or related field
Bachelor’s degree in engineering, Computer Technology or related field
Master’s degree in engineering, Computer Technology or related field
Nice to have: Kubernetes

Sr Systems Engineer - RHEL

Mercury Insurance Services, LLC · Posted Nov 11, 2026

Open

Full-time · Senior
$94K–$179K per year
5–7 years

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Senior Systems Engineer responsible for designing, implementing, administering, and supporting critical, high‑transactional systems with direct customer, revenue, and compliance impact.

Compensation

$94,458 to $179,048 (NJ, NY, WA, HI, AK, MD, CT, RI, MA)

Responsibilities

Implements infrastructure systems and components for business and IT applications
Conducts installations, configurations, updates, documentation, and knowledge transfer
Analyzes, diagnoses, isolates and identifies system problems
Creates short‑term solutions and long‑term remediation plans
Participates in application development process

Requirements

BS Computer Science or a related field or equivalent combination of education and work experience

Skills

Red Hat Enterprise Linux administration systemd package and patch management (rpm/dnf)SELinux firewalld cgroups

Cyber Range Operations Staff

Liberty Business Associates, LLC · Posted Jan 1, 2024

Open

Charleston, South Carolina, United States
On-site
Full-time · Associate
5+ years

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Range Operations Staffers are responsible for day-to-day configuration, maintenance, and upkeep of hardware and software systems.

Responsibilities

Coordination with the various Event Staff members to schedule operations that do not intrude on other concurrent activities while meeting customer needs
Follow security procedures to maintain backups, logs, and checklists that verify system operation and confirm compliance with classification requirements
Regularly communicate range status, risks and recovery plans to management
Coordinate with security to confirm the status of event-related equipment, classified material, and other media. Verifying post-event sanitization and archival, and supporting the services necessary to destroy and document the destruction of classified material.

Requirements

Bachelor's degree from an accredited college in a related discipline
Nice to have: cyber concepts
Nice to have: penetration testing methods
Nice to have: vulnerabilities
Nice to have: information assurance

Skills

TS/SCI clearance hardware systems configuration and installation hardware systems interconnectivity ports and protocols

DevSecOps Engineer

SQUAD · Posted Nov 11, 2026

Open

Remote, Ukraine +1 more
Remote
Contract · Senior
5+ years

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Senior DevSecOps Engineer with deep Linux and security expertise and strong AWS skills

Locations (2)

Kyiv, Ukraine
Ukraine

Compensation

Competitive compensation and perks Opportunity to receive a Performance Bonus for your individual achievements and a Loyalty Bonus recognizing your dedication to the company

Responsibilities

Contribute to architecture and design decisions for secure device management, identity, and updates
Build and maintain hardened Linux OS images and configuration baselines aligned with security standards
Design and implement secure, reliable update mechanisms for a fleet of edge devices, including offline sites
Implement device identity, certificate management, and secure remote access
Run containerized workloads on edge devices securely

Skills

Linux Ubuntu

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