Network & Security Engineer

You want to join a company that places people at the heart of its concerns? We are waiting for you at Extia !

As a consulting company specialized in IT and digital sectors, Extia has prioritized an approach that combines performance and well-being at work since its creation in 2007. This vision is shared today by more than 2,500 Extians across France and internationally, and has been recognized by the Great Place to Work® certification for 15 years!

We believe in equal opportunity and offer every candidate the chance to reveal their potential, without distinction of any kind. At Extia, it's "First who, then what" so, let's do it!

Analytical mindset: Able to identify and resolve security and networking issues quickly and accurately

Autonomous and proactive: Takes initiative in identifying improvement opportunities and handling incidents independently

Strong collaboration skills: Works well in cross-functional and international teams

Attention to detail: Maintains thorough documentation and follows best practices rigorously

Problem-solving orientation: Brings a logical, structured approach to investigating complex issues

Adaptability: Comfortable working in a fast-paced, evolving technological environment

We are seeking a skilled Network Security Engineer to join our cybersecurity team. In this role, you will be responsible for configuring and maintaining firewall policies, analyzing network traffic, and implementing security best practices to ensure a robust and secure infrastructure.

Key Responsibilities:

• Configure and maintain firewall rules and policies on Fortigate and/or Palo Alto platforms
• Monitor and analyze network traffic to identify anomalies and ensure adherence to secure communication protocols
• Troubleshoot and resolve security issues related to ports, protocols, and proxy configurations
• Implement microsegmentation strategies within 3-tier architecture environments
• Configure and manage NAT rules to control IP address translation and traffic flow
• Collaborate with security, infrastructure, and application teams to support incident resolution and policy updates
• Document configuration changes, procedures, and network diagrams
• Work with ticketing systems (ServiceNow experience is a plus) for issue tracking and resolution

Required Skills and Qualifications:

• Proven experience with Fortigate and/or Palo Alto firewalls
• Strong understanding of networking fundamentals, including microsegmentation and NAT
• Solid knowledge of TCP/IP, ports, protocols, and proxy configurations
• Experience in troubleshooting and securing complex network environments
• Familiarity with ITSM tools such as ServiceNow
• Excellent verbal and written communication skills in English (French is a plus)
• Ability to work independently as well as part of a global, cross-functional team