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IT Security Specialist F5 - Firewall

At Proximus SpearIT, we do everything to enable companies to work smarter, safer and faster. Customers come to us for our wide and extensive offering of IT services. Due to our strong growth, we are always looking for new employees.

Proximus SpearIT strengths:

  • Infrastructure projects and integrations, on-site and in the cloud;
  • Services related to networks, security, Skype for Business, storage, network and server maintenance, monitoring, service desk, and on-site support;
  • Support by IT specialists, project managers and interim managers;
  • Sale of servers, network equipment, smartphones, tablets, PCs and accessories.

What do we expect from you

As part of your role, you will contribute to the realization of the digital transformation of the Integrated Police by securely deploying different tools and technologies to meet the challenges of today and tomorrow.
In this regard, cybersecurity plays an important role and a modern, reliable, high-performance and above all secure environment is essential.
To this end, you will be part of a multidisciplinary division. Within this team you will hold the position of ICT Security Specialist – F5 and firewall.

  • Management of the technical ICT infrastructure with special attention to F5 (Advanced Web Application Firewall) and firewalls.
  • Developing and documenting technical security policies, as well as ensuring their correct application.
  • Continuously monitor and evaluate the state of the IT systems in terms of security and protection against malicious actions.
  • Effective intervention in crisis situations (organized attacks, intrusions in the network, virus detection, ...)
  • Provide advice on necessary technical solutions to secure connections with external partners via intranet and internet.
  • Implement technical solutions to counter these vulnerabilities.
  • Perform technical risk analyzes for management on the various IT systems that DRI manages.
  • Discovering flaws in the security of, among others, the Windows, Linux, Android, iOS environments by performing 'pentestings'.

Technical knowledge:

  • Routers, firewalls of the "statefull packet inspection" type and applicative firewalls, Forcepoint, Fortinet, Checkpoint, Palo Alto (knowledge of one of these platforms in descending order of importance).
  • TCP/IP, http, https, SSL and SNMP
  • Web Proxy products (Squid, …)
  • Endpoint protection products (Windows Defender, Kaspersky, …)
  • VPN solutions (of the 'remote access VPN' type but also of the 'site-to-site VPN' type)
  • Intrusion Detection and Intrusion Prevention systems (IDS/IPS)
  • Microsoft security solutions (O365, Intune, ATP, … )
  • Operating systems : Microsoft Windows Server 2012R2, 2016, 2019, Enterprise Linux server (preferably RedHat Enterprise Linux) and Microsoft Windows for Windows 10 clients
  • Content inspection engines for mail and web browsing systems
  • Threat detection technology through sandboxing
  • Principles and algorithms for encryption (Public Key, Private Key, RSA, DES, 3DES, AES, Rijndael, …).
    Radius, TACACS+
  • Terminal server solutions such as Citrix
  • Monitoring and log correlation tools such as Splunk
  • Penetration testing tools such as Kali
  • Local wireless network (WiFi) security


  • Graduate or master's degree in computer science or electronics.
  • Demonstrable experience of at least 5 years in a similar position.
  • More specifically, have practical experience of at least 5 years in managing all aspects of IT security in an IT environment of at least 50 sites and/or at least 5000 users.
  • Preferably bilingual (Dutch, French) or, if not, have a sufficient basic knowledge of a second national language to be able to participate smoothly in meetings with other specialists and with representatives of the users.- Knowledge of technical English is essential.
  • Possess good communication skills (writing and speaking).
  • Demonstrate autonomy and initiative.
  • Able to adapt quickly to changes in the situation.
  • Able to work in groups, flexibility of schedule.
  • To be able to record the result of the work delivered in writing (reports, documentation,…)
  • Creative, constructive and solution-oriented.
  • Stress resistant.
  • Customer-oriented attitude.

What do we offer?

At Proximus SpearIT, you can take your career in many directions. You will be among the first to explore new technologies and can constantly update your skills in our ICT Academy. Our working culture is that of an SME: we say it like it is and never shy away from a challenge.

Since we form part of the Proximus Group, you also benefit from the advantages and security of a large company. You can expect an attractive salary and an extensive package of fringe benefits.

Eager to take the plunge?

Don’t hesitate: quickly send us your motivation letter and CV using the button below.

If you have any questions about the job, feel free to call Mohamed Debdabi on 0476 69 56 57.


Proximus SpearIT nv / sa - Carlistraat / Rue Carli 4, 1140 Evere, BE

Apply now!