Network & Security Engineer Expert

Mission Overview

Keystone Solutions is seeking a Network & Security Engineer Expert for a consultancy mission at a client site. In this role, you will work alongside various infrastructure, application, security, and telephony teams, responsible for the design, implementation, maintenance, and security of diverse network infrastructures, Wi-Fi, security, and telephony systems.

Key Responsibilities

• Contribute to the definition and implementation of standardized and automated processes to optimize operations and enhance team efficiency.
• Provide significant value to infrastructure projects by producing necessary technical documentation (High-Level Design, Low-Level Design, DAT) for management and maintenance.
• Engage in diverse projects such as the implementation or improvement of network infrastructures, establishment of security solutions, and conducting network audits for clients.
• Maintain an active watch to identify developments and opportunities for infrastructure improvements.
• Participate in the production of new network and security requirements.

Candidate Profile

The ideal candidate must be flexible and autonomous, capable of traveling to client sites in the Brussels region and participating in on-call roles. You should demonstrate rigor, precision, proactivity, adherence to schedules, client-oriented solutions, and strong analytical skills. Proficiency in technical English is essential.

At Keystone Solutions, we pride ourselves on our consultancy nature, offering dynamic projects that provide a broad learning experience and opportunities for career growth. Being a

If you are ready to tackle technical and strategic challenges in a dynamic consultancy environment, apply today at Keystone Solutions Career Portal .

Duration: 03/08/2026 - 31/03/2027 8 months • (full time)

Skills required

• Automatisation : scripting, Ansible - Level: Intermediate - Most recent: This year
• MS tools (O365, Visio) - Level: Advanced - Most recent: This year
• Réseaux Cisco : administration et exploitation de commutateurs (Catalyst, Nexus), contrôleurs Wi-Fi (WLC), Cisco DNA Center (DNAC) et outils de supervision associés. - Level: Expert - Most recent: This year
• Réseaux et protocoles : TCP/IP, IPv4/IPv6, VLAN, MPLS, VPN/IPsec, routage dynamique (BGP, OSPF, EIGRP), SD-WAN. - Level: Expert - Most recent: This year
• Sécurité réseau : administration de pare-feu (Fortinet, Palo Alto), contrôle d'accès réseau (NAC, IEEE 802.1X), solutions F5 (LTM/APM) - Level: Advanced - Most recent: This year
• Services d'infrastructure réseau : DNS, DHCP, IPAM/DDI. - Level: Advanced - Most recent: This year
• Supervision et diagnostic : Wireshark (analyse avancée), PRTG - Level: Advanced - Most recent: This year
• Virtualisation : VMware vSphere - Level: Intermediate - Most recent: 1 to 3 years ago

Language requirements

Dutch Level Elementary proficiency English Level Full professional proficiency French Level Native or bilingual proficiency