Senior System Administrator

Teceze; Nancy; On-site; EUR 42,000 - 60,000; Full time

Job summary

Teceze is seeking a skilled Linux & Windows Systems Administrator to manage Linux (Red Hat, CentOS, Ubuntu) and Windows Server environments. The role covers patching, troubleshooting, AD, networking, storage, backup, virtualization, and security compliance. Strong documentation and teamwork are expected.

The candidate will support infrastructure health, assist with VMware ESXi and Proxmox, and ensure reliable system availability with monitoring tools and security best practices.

Qualifications

• Strong knowledge of Linux operating systems, particularly Red Hat, CentOS, and Ubuntu.
• Hands-on experience with Linux system administration, patching, maintenance, and troubleshooting.
• Good understanding of Windows operating systems and Windows Server administration.
• Strong knowledge of networking fundamentals and client-server communication.
• Experience troubleshooting file-sharing protocols such as NFS, SMB, and Samba.
• Good understanding of Windows Active Directory, domain administration, organizational units, and access management.
• Knowledge of cybersecurity best practices, corporate security policies, and secure system administration.
• Strong analytical, troubleshooting, and problem-solving skills.

Responsibilities

• Administer, maintain, patch, and troubleshoot Linux operating systems, including Red Hat, CentOS, and Ubuntu.
• Perform Windows operating system administration and troubleshoot system-related issues.
• Manage Linux system updates, security patches, configurations, and routine maintenance activities.
• Troubleshoot client-server connectivity and file-sharing issues involving NFS, SMB, and Samba protocols.
• Administer and troubleshoot Windows Active Directory, including organizational units (OUs), domain structures, and access permissions.
• Support infrastructure systems involving storage, backup, virtualization, monitoring, and image deployment.
• Assist with VMware ESXi and Proxmox virtualization environments.
• Monitor system performance, availability, and infrastructure health using monitoring tools.
• Follow corporate cybersecurity policies, security procedures, access controls, and compliance guidelines.
• Document system configurations, troubleshooting activities, changes, and operational procedures.
• Collaborate with infrastructure and IT support teams to resolve technical issues and maintain system availability.

Skills

Linux administration

Red Hat

CentOS

Ubuntu

Windows Server

Active Directory

Networking basics

NFS/SMB/Samba

File sharing

Virtualization

VMware ESXi

Proxmox

Patch management

Troubleshooting

Monitoring

Cybersecurity policies

Tools

VMware ESXi

Proxmox

Samba

Job description

Department: IT Infrastructure / Systems Administration

Role Type: IT Infrastructure Support

Job Summary

We are looking for a skilled Linux & Windows Systems Administrator with strong expertise in Linux operating systems, particularly Red Hat, CentOS, and Ubuntu. The ideal candidate will be responsible for Linux system administration, patching, troubleshooting, Windows administration, file-sharing protocols, and infrastructure support.

The candidate should have a solid understanding of networking, Active Directory, virtualization, storage, backup solutions, monitoring tools, and corporate cybersecurity procedures. Experience with infrastructure automation and system deployment tools will be an added advantage.

Key Responsibilities

• Administer, maintain, patch, and troubleshoot Linux operating systems, including Red Hat, CentOS, and Ubuntu.
• Perform Windows operating system administration and troubleshoot system-related issues.
• Manage Linux system updates, security patches, configurations, and routine maintenance activities.
• Troubleshoot client-server connectivity and file-sharing issues involving NFS, SMB, and Samba protocols.
• Administer and troubleshoot Windows Active Directory, including organizational units (OUs), domain structures, and access permissions.
• Support infrastructure systems involving storage, backup, virtualization, monitoring, and image deployment.
• Assist with VMware ESXi and Proxmox virtualization environments.
• Monitor system performance, availability, and infrastructure health using monitoring tools.
• Follow corporate cybersecurity policies, security procedures, access controls, and compliance guidelines.
• Document system configurations, troubleshooting activities, changes, and operational procedures.
• Collaborate with infrastructure and IT support teams to resolve technical issues and maintain system availability.

Required Skills and Qualifications

• Strong knowledge of Linux operating systems, particularly Red Hat, CentOS, and Ubuntu.
• Hands-on experience with Linux system administration, patching, maintenance, and troubleshooting.
• Good understanding of Windows operating systems and Windows Server administration.
• Strong knowledge of networking fundamentals and client-server communication.
• Experience troubleshooting file-sharing protocols such as NFS, SMB, and Samba.
• Good understanding of Windows Active Directory, domain administration, organizational units, and access management.
• Knowledge of cybersecurity best practices, corporate security policies, and secure system administration.
• Strong analytical, troubleshooting, and problem-solving skills.

Preferred / Good-to-Have Skills

Experience with any of the following technologies will be an advantage: