Junior IT Security Engineer

Join Keystone Solutions as a consultant for a client mission focused on achieving NIS2 compliance within the client's IT department. As a Security Engineer, you will work closely with Infrastructure teams, the Digital Services Center (CDS), and the client's security architect. You will be a key contributor to the technical implementation of cybersecurity measures, covering asset inventory, system hardening, and IT environment security, while supporting projects in the concrete implementation of security requirements defined by architecture and cybersecurity governance. Under the guidance of the client's security architect and in alignment with the cybersecurity and NIS2 roadmap, you will translate security requirements into technical configurations, effective controls, and measurable operational practices. Your role is essential to ensure that measures defined at the strategic and architectural levels are realistic, deployed, and maintained in operational environments. All responsibilities will be performed as a Keystone Solutions consultant at the client site.

• →Contribute to the inventory of IT assets (systems, applications, services, infrastructure components), in line with NIS2 requirements and risk management needs.
• →Implement and maintain hardening measures across environments (systems, networks, identities, endpoints, cloud platforms) according to defined standards and best practices.
• →Support project teams in integrating technical security requirements (Security by Design) from the design and implementation phases.
• →Support the security architect in the operational rollout of security architectures and solution choices.
• →Configure and operate technical security mechanisms: patch management, configuration control, logging, security monitoring, vulnerability management, IAM controls.
• →Analyze identified technical gaps (audits, risk assessments, security reviews) and contribute to their remediation.
• →Participate in producing the technical evidence required for NIS2 compliance (configurations, procedures, logs, technical reports).
• →Collaborate closely with Infrastructure and CDS teams as the technical security reference point.

• Bachelor's or Master's degree in IT or Cybersecurity, with significant experience in technical roles (systems, networks, security).
• Solid command of operational IT environments: systems, networks, directories and identities, endpoints, cloud platforms, and monitoring tools.
• Proven experience in securing and hardening IT environments.
• Understanding of cybersecurity principles and related regulatory requirements, particularly in an NIS2 context.
• Ability to work on cross-functional projects, interacting with architects, project managers, and operational teams.
• Rigorous and pragmatic, solution-oriented, and focused on effective implementation.
• Strong team spirit with the ability to communicate clearly with both technical and non-technical stakeholders.
• Native-level proficiency in French, both spoken and written. English: passive knowledge.

• The candidate must possess the minimum required skills and experience.
• The mission will be carried out primarily on site in Namur on a full-time basis.
• The candidate must be flexible and potentially travel across various business units in Wallonia to meet with business stakeholders.
• Consulting days are 8 hours within a typical working window of 07:00 - 18:00.
• Pre-screening question: Have you previously worked in the passenger transport domain?

As a Keystone Solutions consultant, you will operate on site at the client's locations, embedded with their teams to deliver tangible outcomes. You will collaborate closely with client stakeholders while benefiting from Keystone Solutions' consulting framework, methodologies, and community of experts. Your work will combine hands-on technical implementation with clear reporting and stakeholder engagement, ensuring the client's objectives are met effectively and sustainably.

Keystone Solutions offers access to diverse missions where you can tackle varied challenges such as NIS2 alignment, asset inventory, security hardening, and vulnerability management across different environments and industries. This variety enables you to broaden your expertise and continuously refine your consulting and technical skills.

We accelerate your growth with structured learning paths, mentoring by seasoned consultants, and exposure to modern technologies and best practices in cybersecurity, cloud, IAM, and monitoring. You will have opportunities to deepen your practical knowledge of security architectures, controls, and compliance evidence production.

We foster career progression through increasing responsibilities, from implementing configurations and controls to advising on architecture and helping standardize secure practices at scale. Your achievements on client missions translate directly into recognized milestones within Keystone Solutions' career pathways.

Being a K-Stone means practicing rigor, pragmatism, collaboration, and clarity in every engagement. We bring solution-oriented thinking, measurable execution, and transparent communication to each client project, ensuring trust, impact, and sustained security posture improvements.

Primary on-site presence in Namur, full-time, with potential travel across Wallonia to client business units, aligned with an 8-hour day within 07:00 - 18:00.

French: native-level proficiency required (spoken and written). English: passive knowledge appreciated.

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