Senior Network Security Engineer – Cisco ACI & SD-WAN

Pauwels Consulting; Brussel; Hybride; EUR 90 000 - 130 000; Plein temps

Avantages offerts par ce poste

Hybrid work model

On-site initial onsite period

Résumé du poste

Pauwels Consulting is seeking a Senior Network Security Engineer to oversee the security and operations of a multi-site network environment. You will manage IT and OT systems to ensure 24/7 service availability while supporting large-scale connectivity and modernization projects across Europe.

The ideal candidate has 8+ years in Cisco-focused network engineering, hands-on firewall experience, Azure networking, and automation with Python or Ansible.

Qualifications

• 8+ years of experience in network engineering focusing on Cisco technologies.
• Advanced routing and switching knowledge: OSPF, ISIS, MP-BGP, MST.
• Hands-on experience with Checkpoint and Palo Alto firewalls.
• Azure cloud networking expertise.
• Python or Ansible for network automation.
• Experience with monitoring/security tools: Zabbix, Elastic, ISE, NAC.

Responsabilités

• Manage and secure network operations within IT and OT environments for continuous service availability.
• Prepare and execute technical changes to maintain stability across critical systems.
• Design and deploy connectivity solutions for data centers and cloud-integrated infrastructures.
• Maintain and modernize WAN architectures and enterprise routing protocols.
• Collaborate with cross-functional ICT teams to support network services across multiple European locations.
• Implement and manage network security frameworks including firewalls and access control systems.

Connaissances

Network engineering

Python/Ansible

Azure networking

Routing protocols

Firewall management

Security tools

Standby rotation

Languages

Outils

Cisco technologies

Cisco ACI

Cisco SD-WAN

Cisco Wireless

Checkpoint firewall

Palo Alto firewall

Zabbix

Elastic

ISE

NAC

Description du poste

Our client, a leading organization in the energy infrastructure sector, is seeking a Senior Network Security Engineer to oversee the security and operations of a multi-site network environment. The role involves managing complex IT and OT systems to ensure 24/7 service availability while supporting large-scale connectivity and modernization projects across Europe.

Responsibilities

• Manage and secure network operations within both IT and OT environments to ensure continuous service availability.
• Prepare and execute technical changes with high diligence to maintain stability across critical systems.
• Design and deploy connectivity solutions for data centers and cloud-integrated infrastructures.
• Maintain and modernize wide-area network (WAN) architectures and enterprise routing protocols.
• Collaborate with cross-functional ICT teams to support network services across multiple European locations.
• Implement and manage network security frameworks including firewalls and access control systems.

Requirements

• 8+ years of experience in network engineering with a focus on Cisco technologies.
• Advanced knowledge of routing and switching protocols including OSPF, ISIS, MP-BGP, and MST.
• Proven experience with Cisco ACI, Cisco SD-WAN, and Cisco Wireless solutions.
• Hands-on experience with firewall technologies from Checkpoint and Palo Alto.
• Expertise in cloud networking specifically within Microsoft Azure environments.
• Experience using Python or Ansible for network automation and orchestration.
• Knowledge of backend monitoring and security tools such as Zabbix, Elastic, ISE, and NAC.
• Willingness to participate in a standby rotation (maximum one week in four).
• Proactive team player with the ability to work independently in a complex technical environment.
• You are fluent in English with proficient knowledge of Dutch or French.

Nice to Haves

• Familiarity with TACACS and RADIUS servers.

Offer

• Start date: 28/09/2026
• Duration: 1 year (renewable)
• Work regime: Full-time
• Location: Brussels
• Working model: Hybrid (initial 3 months full-time onsite, followed by 3 days per week onsite)
• Contract: open to both permanent employees and freelancers