About UsFor 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 includes IT infrastructure & operations, cloud & managed services, mobility, workstations & networks, strategy, consulting & AMO, cybersecurity, and 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.comAbout the JobGreat assignments await you with our key account clients in rich and varied environments. We are a Brussels-based financial institution (± 300 employees) operating in a highly available, hybrid multi-cloud environment. We are looking for a freelance senior network & security engineer to reinforce our Network & Security team. This role is both hands-on and technical lead oriented (50/50). You will stabilize, maintain, and oversee a complex hybrid infrastructure while mentoring junior team members and acting as the go-to escalation point. You will report directly to the Head of Infrastructure and collaborate closely with our dedicated Risk & Security team.Main ResponsibilitiesOversight of routing & switching infrastructure (Cisco-based environment)Oversight of firewalling and perimeter security (Palo Alto, Fortigate, Juniper)Oversight of load balancing (F5 BigIP LTM)Oversight of Cisco Call Manager infrastructureL3 escalation support for internal IT teamsMaintain, monitor, and stabilize hybrid cloud connectivityCoordinate with telecom providers, partners and external vendorsEmpower and mentor junior team memberEnsure documentation and operational best practicesTechnical environment: Hybrid multi-cloud (AWS & Azure)Connectivity: Megaport, EquinixTwo Belgian data centers interconnected via Ethernet & Fibre ChannelCisco switches & routersPalo Alto, Fortigate & Juniper firewallsF5 BigIP LTMCisco Call ManagerMust Have8+ years of experience in network engineeringStrong expertise in enterprise routing & switchingHands-on experience with: Cisco Catalyst switches and routers; Palo Alto and/or Fortigate firewalls; F5 BigIP LTMExperience working in hybrid cloud-connected environmentsSolid troubleshooting skills (L3 level)Professional English (written & spoken)Clean certificate of good behaviorNice to HaveCertifications such as CCNP/CCIE, Palo Alto next-gen firewall engineer or Fortinet NSEExperience with IPv6Experience with Cisco Catalyst centerExperience with scripting/automation languages (Python, Ansible and/or Terraform)Experience in financial services environmentsExperience with Linux RedHatExperience with traditional Microsoft productsExperience with vulnerabilities management toolsOperationally strong and comfortable in complex environmentsStructured, documentation-oriented mindsetCalm and pragmatic under pressureCapable of balancing hands-on work with technical coordinationNatural mentor with strong communication skillsAutonomous and delivery-focusedSalarySalary conform to experience.About YouYou have at least 10 years of professional IT experienceFluency in FR/ENG or NL/ENG is preferredYou’re eager to learn, motivated and curiousLet’s have a chat!About the Process1st pre-screening on the phone to discuss your search and our initial opportunitiesJob descriptions sent and Teams meeting arranged with HR and Sales to discuss your experience and the rolePackage proposal agreed beforehandYour CV is shared with the clients you’ve approved to reach the best mission for youAdvantagesHospitalization insurance (partner/children incl.)Group insuranceDental insurance (partner/children included)20 days statutory paid vacations11 days recovery time for a 38/40 work schedule per yearRepresentation fee net per monthInternet allowance of €40 per monthCompany car with national fuel card OR public transport reimbursement OR mobility packageDaily fee of €5.50 netITS subscription for GSM unlimited calls in BelgiumTraining plan (e-learning with ITS covering certification)Extra advantagesClose-knit BE team with strong consultant care and growth opportunitiesRegular follow-up (every 3–6 months)Regular teambuilding eventsFlexibility and trustBenefits of being part of ITS Group with access to wider resourcesCo-optation system
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