Technical Specialist | Halian | Brussels

Halian; Brussel Hoofdstad; On-site; EUR 70,000 - 90,000; Full time

Job summary

Halian in Brussels is seeking an exceptionally skilled Technical Specialist to join the enterprise IT infrastructure team on a fully onsite permanent basis. The role focuses on high availability, security, and performance of server and network infrastructure with strong Windows/Linux and virtualization expertise.

You will administer server OSs, monitor health, deploy patches, and work with security and networking teams to enforce IT governance.

Qualifications

• Bachelor's degree in Computer Science, Information Technology, Systems Engineering, or a related discipline.
• 5+ years of professional IT infrastructure administration or technical specialist experience.
• Deep proficiency in Windows Server, Linux (RHEL/Ubuntu), VMware/Hyper-V, and Active Directory.
• Solid knowledge of TCP/IP, DNS, DHCP, firewalls, and enterprise storage.
• Fluent English (written and verbal).
• Onsite Brussels residency/work authorization.

Responsibilities

• Administer, monitor, and maintain enterprise server OSs, virtualized environments, and core infrastructure.
• Resolve escalated incidents across server and network layers.
• Deploy OS patches, security updates, and software packages with deployment tools.
• Monitor performance, resources, and network latency with observability platforms.
• Support backup, DR testing, and data restoration procedures.
• Collaborate with security and network teams to enforce IT governance.
• Maintain documentation, topology diagrams, and inventories.
• Provide tier-3 guidance to junior staff.
• Participate in change management windows and on-call rotations.
• Create runbooks, health reports, and SOPs.

Skills

Windows Server

Linux (RHEL/Ubuntu)

VMware/Hyper-V virtualization

Active Directory

TCP/IP networking

Education

Bachelor’s degree in CS/IT/SE

Job description

Position Summary

We are seeking an exceptionally skilled and experienced Technical Specialist to join our enterprise IT infrastructure team on a fully onsite permanent basis in Brussels. In this critical technical operations and system administration role, you will be responsible for maintaining, monitoring, and optimizing core IT infrastructure systems and servers. The ideal candidate will bring advanced professional technical support experience, strong systems administration expertise, and fluent English communication skills.

Detailed Job Description

As a Technical Specialist in Brussels via Halian, you will serve as a principal technical authority responsible for ensuring the high availability, security, and performance of enterprise server and network infrastructure. Your daily responsibilities will encompass administering server operating systems, monitoring system health, deploying infrastructure patches, and resolving escalated technical incidents. You will collaborate closely with engineering teams to execute IT infrastructure projects.

Key Responsibilities

• Administer, configure, monitor, and maintain enterprise server operating systems, virtualized environments, and core IT infrastructure.
• Resolve escalated technical incidents, hardware failures, and software malfunctions across server and network layers.
• Deploy operating system patches, security updates, and software packages using enterprise deployment tools.
• Monitor system performance, resource utilization, and network latency using modern observability and alerting platforms.
• Participate in backup administration, disaster recovery testing, and data restoration procedures.
• Collaborate proactively with security operations and network engineering teams to enforce IT governance standards.
• Manage infrastructure documentation, network topology diagrams, and server configuration inventories.
• Provide technical guidance and tier-3 support to junior helpdesk and support specialists.
• Participate in scheduled change management windows and out-of-hours maintenance rotations.
• Author comprehensive operational runbooks, system health reports, and standard operating procedures.

Required Qualifications & Skills

• Bachelor’s degree in Computer Science, Information Technology, Systems Engineering, or a related discipline.
• Minimum of 5+ years of professional IT infrastructure administration or technical specialist experience.
• Deep technical proficiency in Windows Server, Linux (RHEL/Ubuntu), VMware/Hyper-V virtualization, and Active Directory.
• Solid working knowledge of TCP/IP networking, DNS, DHCP, firewalls, and enterprise storage systems.
• Proven analytical problem-solving, incident management, and cross-functional communication capabilities.
• Mandatory language proficiency: Fluent English (written and verbal).
• Mandatory residency/work authorization: Ability to operate fully onsite in Brussels.

Nice-to-Have Skills

• Professional certifications such as Microsoft Certified: Windows Server Administrator, RHCE, CCNA, or ITIL.
• Prior professional experience working within financial institutions, banking, or corporate headquarters in Brussels.
• Familiarity with automation scripting using PowerShell, Python, or Bash.
• Immediate availability for onsite mobilization in Brussels.

Job Details

Salary/Rate: Competitive market rate

Deadline: Immediate

Notice Period: 30 to 60 Days

Contract Duration: Full Time / Permanent

Recruitment Pro Tip

When applying for this Technical Specialist position with Halian, ensure your resume explicitly highlights your enterprise server administration experience, your virtualization expertise, and your incident resolution background.