Cyber Security Consultant - Medior

Freelancer Opportunity

Job Title: Cyber Security Consultant

Job location: Brussels, Belgium

Job duration:2026-08-17 to 2026-12-31

Job weekly hours: 40 hrs./week

Job salary range: 85 euros to 90 euros an hour

Language skills: fluent in English (spoken and written). Knowledge of French and/or Dutch is a plus.

Job description

Part of Network Business Unit (NBU), the Network Platforms & Mobile (NPM) division manages all activities to deploy, operate and maintain Proximus’ core network platforms – the beating heart of our network. These platforms enable a wide variety of telco services, handling network authentication and data session management (both fixed and mobile), setup and processing of voice calls, and enabling SMS, MMS and e-mail messaging.

In this role, you will be part of the NPM security team: our mission is to enable the business securely while protecting Proximus, its customers, and its critical services against internal as well as external threats.

To reinforce this security team, we are looking for a Cyber Security Risk Assurance Consultant. In this role, you will be responsible for supporting major transformation programs, strengthening the cyber-resilience of our platforms and contributing to compliance initiatives.

You will work in a team of security professionals and collaborate with the engineering and operational teams on a daily basis. You will be fascinated by a highly diverse technical environment, the strong collaboration across the different teams and a remarkable can-do attitude.

Your Role:

• You advise the teams during project design and execution, checking for compliance with security requirements, and proposing adequate (technical) controls, in line with the standards defined for the business unit.

• You maintain the oversight of compliance with established baselines, and flag and document risk resulting from any deviations.

• You analyze vulnerability reports, audit findings, penetration test reports, assess the risk and develop effective remediation plans for identified deficiencies.

• You support the teams to adopt and integrate our service platforms with security tooling and services, including e.g. tools for vulnerability scanning, SIEM, PAM, PKI etc.

• You establish a positive working relationship with technical teams to effectively collaborate on reducing operational and technology risks.

• You contribute to the establishment of relevant security metrics that will help to assess and report on risk in a consistent and objective manner.

• You provide security requirements to be included in RfQs and RfPs, evaluate vendor responses and advise business stakeholders.

• You follow up on the effectiveness of administrative controls, including recurring access reviews/recertifications.

• You review and optimize access rights using our central platforms and tools to restrict access to critical infrastructure and to comply with Proximus security policies, Belgian or European laws and regulations that Proximus must comply with.

• You engage in operational processes, review change requests, flag and document any risk incurred by these, and facilitate mitigation of this risk where possible.

• You will report to the divisional security officer.

Your Profile:

• Bachelor or master's degree in IT and/or cyber security or equivalent combination of education and experience.

• Knowledge of information security and risk management.

• Having industry recognized cybersecurity certification(s): CISSP or CISM are highly considered.

• Very good interpersonal skills, mixing collaboration & communication skills, open minded, can-do attitude with constructive assertiveness, while acknowledging the importance of stakeholder management.

• Ability to present complex concepts and issues in a way that is easy to understand for various target audiences: delivery teams, operational teams, management etc.

• Eager to learn. Very curious. Wants to develop himself/herself continuously.

• Able to work in an environment which is continuously changing.

• Background telecom, network engineering, or web engineering is certainly a plus.

• Have some knowledge in telecommunication technologies (5G, IMS, IOT)

• You have strong analytical skills and are able to keep the helicopter overview.

Apply now and start your journey with Team Possible! We want to get to know you.

After your application, we will verify your profile and get back to you within 3

working days.

If you’re successful, you can expect the following steps:

An initial conversation with our recruiter - Swati Kumari

Interview with the Hiring Manager and the team.

Final decision

About Proximus

We are Team Possible turning tech into opportunities.

We are driven by four core pillars: "I care," "I make a difference," "I radically simplify," and "I embrace the future". This means you'll join a team that genuinely cares for customers and colleagues, is empowered to make a real impact, strives to radically simplify complex challenges, and is always looking ahead to embrace the future of technology. We believe in an inclusive and safe environment where everyone can thrive, offering extensive career development resources, including access to over 5,000 training modules and a minimum of 5 days of training per year, to help you continuously learn, grow, and tackle bold challenges with us.