About the mission
We are looking for a Senior Network Security Engineer with extensive experience in firewalling and network security. The role involves designing, implementing, and maintaining a robust security infrastructure to protect critical networks against cyber threats. The position is a full-time assignment starting in June 2026, with a mix of onsite and remote work.
Read the full description
Network Security Engineer (Level 3)
Location: Steenokkerzeel / Melsbroek
Timing: Start planned: June/July 2026 – December 2027 (full-time)
Days: 330 (indicative amount)
Partially remote in consultation with the client
For a long-term and technically challenging assignment, we are looking for a senior Network Security Engineer with in-depth experience in firewalling and network security. You will be responsible for designing, implementing, and maintaining a robust security infrastructure that protects critical networks against cyber threats, unauthorized access, and data breaches.
Location: Steenokkerzeel / Melsbroek
Timing: Start planned: June/July 2026 – December 2027 (full-time)
Days: 330 (indicative amount)
Partially remote in consultation with the client
For a long-term and technically challenging assignment, we are looking for a senior Network Security Engineer with in-depth experience in firewalling and network security. You will be responsible for designing, implementing, and maintaining a robust security infrastructure that protects critical networks against cyber threats, unauthorized access, and data breaches.
Your responsibilities
Network & Security Engineering
Implementing firewall solutions, VPN configurations, and intrusion detection/prevention systems.
Integrating security solutions within the broader network design.
Firewall Management
Configuring, managing, and optimizing firewall environments.
Regularly updating policies based on new risks and changing needs.
Intrusion Detection & Prevention
Implementing and managing IDS/IPS technology.
Analyzing security logs and following up on potential incidents.
VPN Implementation
Rolling out and managing secure VPN connections for employees, partners, and locations.
Ensuring confidentiality and integrity of all data streams.
Security Auditing & Compliance
Conducting audits and vulnerability assessments.
Ensuring compliance with GDPR, PCI DSS, and other relevant standards.
Contributing to the development and improvement of security policies.
Incident Response
Investigating security incidents and coordinating remedial actions.
Implementing improvements based on incident analyses.
Monitoring & Optimization
Continuously monitoring network traffic and analyzing anomalies.
Optimizing network performance without compromising security.
Collaboration & Communication
Collaborating with system engineers, application teams, and other stakeholders.
Clearly communicating complex security topics to technical and non-technical colleagues.
What you bring
Experience
At least 10 years of experience as a Network Engineer within a security context.
Proven experience with design, configuration, and management of firewall environments.
Extensive experience with IDS/IPS, VPNs, auditing, compliance, and incident response.
Bonus: experience with Fortinet and IVANTI Pulse Secure.
Technical Knowledge
Strong knowledge of network protocols, architectures, and monitoring tools (SNMP, NetFlow, ...).
In-depth understanding of encryption, security frameworks, and best practices.
Good knowledge of regulations such as GDPR and PCI DSS.
Skills
Analytical, structured, and strong in problem-solving.
Communicative and able to explain complex technical subjects understandably.
Education & Certifications (plus, not a must)
Bachelor in IT, Computer Science, or equivalent through experience.
Certifications such as CISSP or CCNP Security are a nice addition.
What you'll do
- Implementing firewall solutions, VPN configurations, and intrusion detection/prevention systems.
- Integrating security solutions within the broader network design.
- Configuring, managing, and optimizing firewall environments.
- Regularly updating policies based on new risks and changing needs.
- Implementing and managing IDS/IPS technology.
- Analyzing security logs and following up on potential incidents.
- Rolling out and managing secure VPN connections for employees, partners, and locations.
- Ensuring confidentiality and integrity of all data streams.
- Conducting audits and vulnerability assessments.
- Ensuring compliance with GDPR, PCI DSS, and other relevant standards.
- Contributing to the development and improvement of security policies.
- Investigating security incidents and coordinating remedial actions.
- Implementing improvements based on incident analyses.
- Continuously monitoring network traffic and analyzing anomalies.
- Optimizing network performance without compromising security.
- Collaborating with system engineers, application teams, and other stakeholders.
- Clearly communicating complex security topics to technical and non-technical colleagues.
What we're looking for
- At least 10 years of experience as a Network Engineer within a security context.
- Proven experience with design, configuration, and management of firewall environments.
- Extensive experience with IDS/IPS, VPNs, auditing, compliance, and incident response.
- Strong knowledge of network protocols, architectures, and monitoring tools (SNMP, NetFlow, ...).
- In-depth understanding of encryption, security frameworks, and best practices.
- Good knowledge of regulations such as GDPR and PCI DSS.
- Bachelor in IT, Computer Science, or equivalent through experience.
- Certifications such as CISSP or CCNP Security are a nice addition.
Skills
- Firewall solutions
- VPN configurations
- IDS/IPS technology
- Network monitoring tools