### Network & Security Engineer #### Job Description We are looking for a **Senior Network & Security Engineer** to design, implement, secure, and maintain enterprise network, Wi-Fi, security, and telephony infrastructures. You will collaborate with infrastructure, security, and application teams to deliver scalable and secure networking solutions, support infrastructure projects, and optimize operations through automation and standardization. #### Key Responsibilities - Design, implement, and maintain network, Wi-Fi, security, and telephony infrastructures. - Deploy and support network security solutions, including firewalls, NAC, and load balancers. - Produce technical documentation, including High-Level Design (HLD), Low-Level Design (LLD), and operational documentation. - Perform network audits, infrastructure upgrades, and security improvements. - Develop and automate operational processes using scripting and Ansible. - Monitor, troubleshoot, and optimize network performance and availability. - Participate in infrastructure projects, production deployments, and on-call support. - Stay up to date with emerging technologies and recommend infrastructure improvements. #### Required Skills & Experience - Extensive experience with **Cisco networking** (Catalyst, Nexus, WLC, Cisco DNA Center). - Strong knowledge of networking technologies including **TCP/IP, IPv4/IPv6, VLAN, MPLS, VPN/IPsec, SD-WAN, BGP, OSPF, and EIGRP**. - Experience with **Fortinet**, **Palo Alto**, **F5 LTM/APM**, **NAC (IEEE 802.1X)**, and network security. - Experience with **DNS, DHCP, IPAM/DDI**, **Wireshark**, and **PRTG**. - Knowledge of **Ansible**, scripting, and automation. - Experience with **Microsoft 365**, **Visio**, and **VMware vSphere**. - Strong analytical, troubleshooting, and documentation skills. - Ability to travel within the Brussels region and participate in on-call rotations. #### Preferred Qualifications - Valid **CCNA** certification. - F5 Load Balancer certification. - Wireshark certification. - Microsoft **Azure Fundamentals (AZ-900)** certification. - VMware vSphere certification. - Experience working in the public sector. #### Languages - Native or bilingual **French**. - Full professional proficiency in **English**. - Basic knowledge of **Dutch**. #### Work Arrangement - **Location:** Brussels, Belgium - **Work Model:** Hybrid