Mission Overview:
Keystone Solutions is seeking an experienced Security Engineer for a consultancy mission at a client site. The consultant will play a crucial role in enhancing the security posture of information systems within the water sector in Wallonia, focusing on operational security and compliance with NIS2 regulations.
Key Responsibilities:
* Participate in operational security (SecOps) for both internal systems and clients.
* Administer, configure, and optimize Security Centers (SIEM, EDR, vulnerabilities).
* Manage SOC alerts: qualification, analysis, escalations, and coordination with technical teams.
* Engage in incident response activities: containment, analysis, remediation, and reporting.
* Establish and adjust detection rules, dashboards, alerts, and playbooks.
* Configure and secure client technical environments: servers, networks, cloud, firewalls.
* Maintain and adjust security tools: EDR, SIEM, IDS/IPS, anti-malware solutions.
* Develop security-related projects such as unified vulnerability management.
* Apply hardening benchmarks (CIS, ANSSI, NIST).
* Conduct technical security reviews of projects and propose remediation plans.
* Document architectures, configurations, and security parameters.
* Contribute to internal and client technical risk analyses.
* Participate in drafting and improving policies, procedures, and processes.
* Prepare and support audits (internal, client, NIS2).
* Produce posture reports, KPIs, and security dashboards.
* Collaborate with systems, network, development, and support teams.
* Provide technical security advice in internal and client projects.
* Participate in security awareness initiatives for teams as needed.
Required Skills:
* Soft Skills: Attention to detail, analytical mindset, clear communication, autonomy, initiative, collaborative spirit, and service orientation.
* Technical Skills: Strong knowledge of Windows Server / Linux environments, networking concepts (firewalls, VLAN, VPN, routing, segmentation), experience with EDR/XDR, SIEM, and SOC tools, system hardening practices, and familiarity with Azure / Entra ID / Microsoft 365.
* Language: Proficient in French and technical English.
Experience:
* 5+ years of experience in a security engineer role, SecOps, or security-focused system/network engineering.
* Proven experience in administering security tools (EDR, SIEM, monitoring).
* Experience in incident response or SOC monitoring is preferred.
* Experience in MSP, MSSP, or multi-client environments is highly valued.
* Strong knowledge of NIS2 directive, ISO 27001, or equivalent frameworks.
* Technical or security certifications are appreciated (MS-500/SC-200, CySA+, CEH, etc.).
If you are ready to tackle technical and strategic challenges in a dynamic consultancy environment, apply today at Keystone Solutions Career Portal.
Duration: 01/07/2026 - 30/06/2027 12 months • (full time)
Skills required:
* Compétences « soft skills »
* Rigueur et sens du détail, indispensable pour les environnements critiques.
* Esprit analytique, capacité à diagnostiquer et résoudre des incidents complexes.
* Clarté de communication, aussi bien avec des profils techniques que non techniques.
* Autonomie et initiative, capacité à prioriser dans un contexte multi-clients.
* Esprit collaboratif, travail en équipe avec le CISO, l’ISM et les équipes techniques.
* Sens du service, essentiel pour les activités MSP et la relation client.
* Compétences techniques (niveau fonctionnel/encadrement)
* Très bonnes connaissances des environnements Windows Server / Linux.
* Maîtrise des concepts réseau : firewalls, VLAN, VPN, routage, segmentation.
* Expérience en solutions EDR/XDR, SIEM et outils SOC.
* Pratique du durcissement système et des benchmarks (CIS, NIST, ANSSI).
* Connaissances en Azure / Entra ID / Microsoft 365 / Microsoft Security Center appréciées.
* Compréhension des vulnérabilités, CVE, scoring, remédiation.
* Bonne maîtrise de la documentation technique.
* Une expérience sur environnements multi-clients / MSP est un atout majeur.
* Langue : Maitrise parfaite du français et de l’anglais technique
* Expérience
* 5 à 7 ans d’expérience dans un rôle d’ingénieur sécurité, SecOps ou ingénieur système/réseau orienté sécurité.
* Expérience confirmée dans l’administration d’outils sécurité (EDR, SIEM, monitoring).
* Expérience en réponse aux incidents ou suivi SOC souhaitée.
* Expérience MSP, MSSP ou multi-clients fortement appréciée.
* Connaissance avérée de la directive NIS2, ISO 27001 ou cadres équivalents
* Certifications techniques ou sécurité appréciées (MS-500/SC-200, CySA+, CEH, etc.).
* View more
* Job specifications
* Ingénieur Sécurité_12062026.docx
Language requirements:
English
Level Professional working proficiency
French
Level Native or bilingual proficiency