Linux (Ubuntu and Red Hat) administration jobs

Middleware Team Lead

CDO Technologies Inc · Posted Nov 14, 2026

Open

Full-time · Lead
8+ years

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Middleware Team Lead

CDO Technologies Inc · Posted Nov 14, 2026

Open

Full-time · Lead
8+ years

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Senior Systems Security Engineer

Lumen Technologies · Posted Nov 13, 2026

Open

Remote, United States
Remote
Full-time · Senior
$83K–$122K per year
6+ years

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Join Lumen’s Black Lotus Labs as a Lead Site Reliability Engineer within the US-based Information Security / Big Data team. This role involves operational support of on-premises and cloud hosted Linux (Ubuntu) systems supporting a big data infrastructure (Hadoop ecosystem, Elasticsearch, Redis, Docker Swarm) used for cyber threat analysis and security research.

Compensation

Location Based Pay Ranges: $82,969 - $110,625 in these states: AL, AR, AZ, FL, GA, IA, ID, IN, KS, KY, LA, ME, MO, MS, MT, ND, NE, NM, OH, OK, PA, SC, SD, TN, UT, VT, WI, WV, and WY. $87,117 - $116,156 in these states: CO, HI, MI, MN, NC, NH, NV, OR, and RI. $91,266 - $121,688 in these states: AK, CA, CT, DC, DE, IL, MA, MD, NJ, NY, TX, VA, and WA.

Responsibilities

Respond to system alerts and take appropriate action to troubleshoot and resolve identified issues.
Open and maintain Jira tickets to track system issues, tasks, and required follow-up activities.
Investigate system resources, processes, and performance issues to identify root causes and potential solutions.
Maintain system infrastructure to support ongoing stability, reliability, and availability.
Tune and optimize systems to improve overall performance, efficiency, and resource utilization.

Requirements

Bachelors Degree
Masters Degree
Nice to have: Hadoop distributions
Nice to have: Docker and Docker Swarm
Nice to have: Gitlab repository

Skills

Linux administration Big data systems (Hadoop)

IT Sustainment Engineer/Systems Administrator

Caci · Posted Nov 13, 2026

Open

Chantilly, Virginia, United States
On-site
Full-time · Mid
$87K–$182K per year
3+ years

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Implement and maintain IT infrastructure to ensure stability, security, and efficiency of IT systems.

Compensation

The proposed salary range for this position is: $86,600 - $181,800

Responsibilities

Maintain ServiceNow system architecture, including hardware and software components, to meet functional requirements
Monitor system performance using/creating Splunk dashboards and AWS cloudwatch
Deploy new code to test and production environments in both self-hosted, Kubernetes and cloud (AWS) configurations
Lead and/or participate in troubleshooting activities to ensure availability of enterprise systems
Perform OS (Linux), application (ServiceNow, Tableau, Splunk, Kubernetes) patching and upgrades

Requirements

BS degree in Computer Science, Engineering or related technical field
Nice to have: ITIL v4
Nice to have: AWS Architect certification
Nice to have: ServiceNow Admin certification

Skills

ServiceNow Linux administration AWS Kubernetes

DNS Platform & DevOps Engineer

Comcast Resume · Posted Nov 13, 2026

Open

Philadelphia, Pennsylvania, United States +2 more
On-site
Full-time · Senior
$94K–$148K per year
5–7 years

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The DNS Platform & DevOps Engineer 3 will join Comcast's Critical Network Services (CNS) DNS/NTP Engineering and Operations team, responsible for developing, modernizing, and supporting critical DNS and NTP services across Comcast's network.

Locations (3)

Philadelphia, Pennsylvania, United States
New Jersey, United States
Virginia, United States

Compensation

This job can be performed in New Jersey, and Virginia with a Pay Range of $94,321.60 - $147,913.42

Responsibilities

Develop and maintain Python-based applications, APIs, and automation tools
Build and maintain CI/CD pipelines and support automated application deployments
Develop, deploy, and troubleshoot containerized applications in Kubernetes environments
Administer and troubleshoot Linux-based infrastructure, including Rocky Linux

Lead Reliability & Performance Engineer

6084-Janssen Research & Development Legal Entity · Posted Nov 13, 2026

Open

Raritan, New Jersey, United States +1 more
Hybrid
Full-time · Lead
$96K–$155K per year
8+ years

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The Lead Reliability and Performance Engineer will lead the strategy, delivery, and operational performance of the Windchill-based Product Lifecycle Management platform supporting MedTech.

Locations (2)

Raritan, New Jersey, United States
West Chester, Pennsylvania, United States

Compensation

The anticipated base pay range for this position is: $96,000- $155,250

Responsibilities

Defines and maintains service-level indicators, service-level objectives, reliability dashboards, alert thresholds, and error-budget reporting for critical PLM services.
Engineers full-stack observability across Windchill, ThingWorx, Java/JVM processes, web tiers, queues, integrations, databases, operating systems, cloud infrastructure, storage, and network dependencies using Dynatrace and complementary platform telemetry.
Builds automated health checks, synthetic monitors, anomaly detection, and actionable alerts that distinguish user-impacting conditions from noise and accelerate detection and diagnosis.

Senior Linux Systems Administrator

University of Texas at Austin · Posted Nov 13, 2026

Open

Austin, Texas, United States
Senior
$85K–$100K per year
5+ years

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Experienced Senior Linux Administrator to support and evolve a Linux infrastructure in a compliance-driven environment for the Advanced Technology Laboratory (ATL).

Compensation

$85,000-$100,000+/negotiable depending on qualifications

Responsibilities

Perform Linux computer systems installation, configuration, administration, maintenance, troubleshooting, and end-user support
Ensure Linux systems integrate properly with SAN/NAS storage and backup infrastructure
Support infrastructure modernization efforts
Administer configuration management tooling (Salt/Ansible)
Establish and maintain repository infrastructure for software distribution and patching

Requirements

Bachelor's degree in computer science or other related field
Nice to have: Ubuntu administration
Nice to have: Golden images and automated provisioning (Kickstart, PXE, cloud-init)
Nice to have: VMware vSphere administration
Nice to have: Infrastructure architecture

Skills

Linux administration SAN/NAS integration Backup and storage infrastructure

Sr. Sales Enigneer

Thales Group · Posted Nov 13, 2026

Open

Madrid, Madrid, Spain
Senior

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Senior Data Security Sales Engineer supporting sales organization in Iberia, providing pre‑sales technical expertise, demonstrations, workshops and PoV engagements.

Responsibilities

Partner with Regional Sales Managers to develop effective sales strategies and drive business growth.
Engage with prospects to understand their use cases, application environments, data flows, technical requirements, and business needs.
Present and demonstrate how Thales data security solutions deliver measurable value once customer discovery is complete.
Plan, manage, and execute product evaluations and Proof of Value (PoV) engagements.
Enable and support distributors and partners, strengthening their technical expertise and their ability to position Thales solutions.

Requirements

Bachelor’s degree in Computer Science, Mathematics, or a related field
Nice to have: customer‑centric selling methodologies
Nice to have: cryptographic APIs and frameworks
Nice to have: application development
Nice to have: APIs

Skills

problem-solving solution development architecture design

Senior System Infrastructure Specialist

Bertelsmann-Jobs · Posted Nov 13, 2026

Open

İstanbul, Istanbul, Turkey
Full-time · Senior
6–8 years

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Manage and optimize enterprise virtualization infrastructure, administer Microsoft Azure IaaS services and hybrid infrastructure environments, and manage Windows Server and Linux environments to ensure high availability and performance.

Responsibilities

Manage and optimize enterprise virtualization infrastructure, including VMware vSphere, ESXi, vCenter, and vSAN
Administer Microsoft Azure IaaS services and hybrid infrastructure environments
Manage Windows Server and Linux environments, including Active Directory, DNS, DHCP, Group Policy
Monitor and optimize infrastructure performance, capacity, availability, security, and operational costs
Manage enterprise backup and recovery solutions

Requirements

Bachelor's degree in Computer Engineering, Information Technology, or a related field

Skills

VMware vSphere ESXi vCenter vSAN Microsoft Azure IaaS Windows Server Active Directory

Senior System Infrastructure Specialist

Arvato · Posted Nov 13, 2026

Open

Istanbul, Istanbul, Turkey
Senior
6–8 years

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Manage and optimize enterprise virtualization infrastructure, administer Microsoft Azure IaaS services and hybrid infrastructure environments, manage Windows Server and Linux environments, monitor and optimize infrastructure performance, manage enterprise backup and recovery solutions, perform system maintenance, patch management, troubleshooting, and root cause analysis.

Responsibilities

Manage and optimize enterprise virtualization infrastructure, including VMware vSphere, ESXi, vCenter, and vSAN, ensuring high availability and performance
Administer Microsoft Azure IaaS services and hybrid infrastructure environments, including cloud networking, identity management, and integration with on-premises datacenters
Manage Windows Server and Linux environments, including Active Directory, DNS, DHCP, Group Policy, and related infrastructure services
Monitor and optimize infrastructure performance, capacity, availability, security, and operational costs
Manage enterprise backup and recovery solutions, ensuring data protection, disaster recovery readiness, and business continuity

Requirements

Bachelor's degree in Computer Engineering, Information Technology, or a related field

Skills

VMware vSphere ESXi vCenter

Senior DevOps & Platform Engineer

The Dignify Solutions, LLC · Posted Nov 13, 2026

Open

Remote, United States
Remote
Full-time · Senior

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Responsibilities

Linux administration and troubleshooting (RHEL, Ubuntu)
Container technologies include Docker or equivalent runtimes
Kubernetes administration of AKS and on-premises K8/K3s
Strong understanding of containerization technology and concepts including: Images and registries, Docker files/container build techniques, Volumes and persistent storage, Networking, logs/troubleshooting, environment and runtime configuration
NGINX administration and troubleshooting

Requirements

Nice to have: Azure Application Gateway
Nice to have: n8n workflow automation
Nice to have: Apache Kafka
Nice to have: JFrog
Nice to have: ACR

Skills

Linux administration RHEL Ubuntu Docker Kubernetes AKS K8/K3s

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