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Great assignments await you with our key account clients in rich and varied environments
For one of our clients, a major organization operating in a critical infrastructure environment, we are looking for an IT Senior Network Engineer to support the implementation of network segregation initiatives and maintain a modern, secure and resilient LAN infrastructure.
The consultant will work in a hybrid setup, with regular onsite presence in Brussels and, when required, on production sites in Wallonia. The mission is long-term and involves both operational network engineering and project-based activities in a complex IT/OT environment.
The IT Senior Network Engineer will contribute to the maintenance, evolution and security of the client’s network infrastructure, with a strong focus on LAN, network segregation, OT resilience and monitoring.
Main responsibilities include:
Maintaining and updating the Extreme Networks infrastructure.
Following up security tickets and CVEs related to LAN components, including switches, Wi-Fi, NAC and related network equipment.
Providing second-line support to users and technical teams.
Configuring and programming Extreme switches.
Supporting the DRP project through the design and implementation of Extreme network equipment.
Performing physical data center maintenance activities, including rack-related tasks.
Configuring, testing, implementing and improving monitoring through SolarWinds, including alarms and dashboards.
Supporting OT security monitoring by configuring Nozomi-related network requirements, including mirror ports on Extreme switches.
Working with Extreme XIQ.
Supporting network resilience initiatives in OT environments.
Fine-tuning existing network implementations.
Documenting new requests, existing infrastructure, changes and technical decisions.
Ensuring compliance with GDPR, ISO27001 and NIS2 requirements throughout the mission.
You have the following skills
Required technical skills:
Strong experience as a Senior Network Engineer in complex LAN environments.
Advanced knowledge of Cisco Routing & Switching.
Expert knowledge of DNS and DHCP.
Strong hands-on experience with Extreme Networks technologies, especially:
Extreme OS
Extreme NAC
Extreme XIQ
Strong knowledge of routing protocols.
Strong understanding of network segregation and network security principles.
Good knowledge of LACP, MLAG and mirror port configuration.
Experience with Palo Alto firewalls, Panorama and PAN-OS.
Experience with SolarWinds IPAM, monitoring, alarms and dashboards.
Experience or strong understanding of OT networking environments.
Knowledge of Nozomi for OT networking is a strong asset.
Experience with industrial networks, SCADA or critical infrastructure environments is a strong plus.
Ability to produce and maintain clear technical documentation.
Understanding of ISO27001, NIS2 and security requirements for essential service operators.
Languages:
French: full professional proficiency.
Dutch: full professional proficiency.
English: full professional proficiency.
Soft skills:
Autonomous and hands-on mindset.
Strong troubleshooting and analytical skills.
Ability to work in critical and regulated environments.
Good communication skills with technical and non-technical stakeholders.
Structured approach to documentation, change management and security compliance.
Votre profil
You have at least 7 years of professional experiences in IT
If you are at least fluent in FR/ENG or NL/ENG it’s best
You’re eager to learn, motivated and curious
Let’s have a chat !
Advantages
Hospitalization insurance (partner/children incl.)
Group insurance
Dental insurance (partner/children included)
20 days statutory paid vacations (legal vacations cumulated for 1 year of work)
11 days recovery time work 38/40 per year (= annual average: 1 day per 20 days worked) if the client asks you to work 8h/day
Representation fee net per month.
Internet fee of € 40 per month.
Company car with national fuel card OR Public transport reimbursed OR mobility package.
Daily fee of 5.50€ net /day provided.
Subscription GSM unlimited calls for Belgium (ITS subscription)
Training plan (e-learning - certification at ITS charge)
Extra advantages:
Being a rather small team in BE (6 in back-office), we’re very close to each of our consultants and we differentiate ourselves trying to really take care of you and make you grow with us and within our different clients.
Regular follow-up (every 3 to 6months depending on your needs/will)
Regular teambuilding to meet-up and have fun (every 3 months more or less)
Flexibility and trust
Benefits of still being part to a bigger group (ITS Group) and having access to resources and of a larger team of Experts
Co-optation system because sharing is caring!
Processus de recrutement
1st pre-screening on the phone to discuss about your search and conditions and our first potential opportunities matching.
Job descriptions sent and Teams meeting fixed with us (HR and Sales) to dig into your experience and the role.
Package proposal so we all agree beforehand.
Your CV is sent to the different clients you’ve agreed to, to find the best mission for you!
En ligne depuis le 29.06.2026
Bruxelles
CDI
Entité : ITS Group Benelux
Anglais
Français
Néerlandais
Fonction managériale : Non
Mobilité : Non
Mode de poste : Sur Site
Salaire : Salary conform to experience.
Réf. SA0410
For more than 25 years, ITS Group has been a French ESN specializing in digital transformation, employing around 1,400 employees across 8 agencies in France and 1 in Belgium.
Our expertise: IT infrastructure & operations, cloud & managed services, mobility, workstations & networks, strategy, consulting & AMO, cybersecurity, development of business applications.
ITS Group places its CSR commitment at the heart of its concerns by developing sustainable and responsible digital technology and by promoting the professional and personal development of its employees.
Find out more: www.itsgroup.com
