Linux Administrator

Thunderhawk Technology Partners
Naperville, United States of America
2 days ago

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Working hours
Regular working hours
Languages
English
Experience level
Senior

Job location

Naperville, United States of America

Tech stack

Java
.NET
Microsoft Windows
Microsoft Active Directory
Antivirus Softwares
Application Performance Management
User Authentication
Bash
Ubuntu (Operating System)
CentOS
Data Recovery
Linux
Firmware
Monitoring of Systems
Hyper-V
Identity and Access Management
Kerberos (Protocol)
Lightweight Directory Access Protocols (LDAP)
Linux System Administration
Linux Servers
Log Analysis
Windows Server
Nagios
Performance Tuning
Powershell
Red Hat Enterprise Linux - RHEL
Virtualization Technology
Software Vulnerability Management
Scripting (Bash/Python/Go/Ruby)
Enterprise Software Applications
Patch Management
VMware

Job description

Seeking a highly experienced Senior Windows & Linux Administrator with 15+ years of enterprise infrastructure experience. The ideal candidate should possess strong expertise in Windows Server, Linux administration, security hardening, patch management, backup & recovery, virtualization, monitoring, authentication systems, and production support for mission-critical environments.

Must-Have Screening Questions:

  1. How do you troubleshoot a Linux server experiencing high CPU utilization?
  2. Explain your approach to Windows Server patch management in a production environment.
  3. How do you troubleshoot Kerberos authentication failures?
  4. What steps do you follow to validate backup and disaster recovery readiness?
  5. Describe your experience with VMware snapshots and recovery scenarios.
  6. How do you identify and remediate security vulnerabilities on Windows and Linux servers?

Key Skills:

  • Windows Server Administration
  • Linux Administration (RHEL, CentOS, Ubuntu)
  • Active Directory (AD)
  • Kerberos Authentication
  • VMware / Hyper-V
  • Patch Management
  • Security Hardening
  • Vulnerability Remediation
  • Backup & Recovery
  • Antivirus / EDR Solutions
  • System Monitoring & Performance Tuning
  • Production Support (L2/L3), System Administration:
  • Install, configure, upgrade, and maintain Windows and Linux servers.
  • Perform OS patching, upgrades, firmware updates, and driver installations.
  • Manage .NET, Java, and enterprise application runtime environments.

Backup & Recovery:

  • Manage system and application backups.
  • Configure and maintain VM snapshots.
  • Validate backup success and perform recovery testing.

Security & Compliance:

  • Implement security hardening standards.
  • Manage Antivirus/EDR platforms.
  • Maintain certificates and resolve vulnerabilities.
  • Ensure compliance with enterprise security policies.

Monitoring & Performance:

  • Monitor CPU, memory, storage, and application performance.
  • Analyze logs and troubleshoot performance issues.
  • Configure monitoring and alerting tools.

Network & Authentication:

  • Troubleshoot firewall, port, and connectivity issues.
  • Resolve AD, LDAP, and Kerberos authentication problems.
  • Support identity and access management integrations.

Incident Management:

  • Provide L2/L3 production support.
  • Perform root cause analysis (RCA).
  • Resolve application compatibility and runtime issues.
  • Implement preventive measures for recurring incidents.

Requirements

  • 15+ years of Windows & Linux Administration.
  • Strong expertise in RHEL, CentOS, Ubuntu, and Windows Server.
  • Hands-on experience with VMware/Hyper-V.
  • Experience supporting enterprise production environments.
  • Strong troubleshooting and incident management skills.

Preferred:

  • Enterprise Monitoring Tools
  • Vulnerability Management Tools
  • Automation/Scripting (PowerShell, Bash)
  • ITIL / Change Management Experience

Apply for this position