Job DescriptionJoin KEYES as a Senior Security Engineer – AI Security & Hardening. KEYES supports private and public organisations in Belgium and across Europe in their digital transformation by combining business expertise, technological mastery, and a long‑term vision.We support large enterprises, the public sector, healthcare organisations, and SMEs in all their digital challenges: Infrastructure & Cloud Solutions, Cybersecurity Solutions, Business Software Solutions, Mainframe Solutions, Data & AI Solutions, Advisory Solutions, and Staffing Solutions. More information: www.keyes.eu.YOUR MISSIONAs a Senior Security Engineer, you will be responsible for strengthening the security posture of our clients' environments, with a particular focus on vulnerability management, system hardening, and the security of Artificial Intelligence solutions.Your Key Responsibilities Will IncludeIdentifying, analysing, and prioritising vulnerabilities affecting infrastructures, systems, applications, and cloud environments.Maintaining continuous awareness of emerging vulnerabilities, cyber threats, and AI‑related security challenges.Participating in the assessment and security of Artificial Intelligence solutions, including generative AI models, Machine Learning platforms, and associated data processing environments.Defining and implementing hardening measures in accordance with security best practices and frameworks such as CIS Benchmarks, NIST, ANSSI, and other industry standards.Designing and leading remediation plans aimed at reducing attack surfaces and improving the resilience of technical environments.Performing technical risk assessments and providing security recommendations aligned with business requirements.Identifying AI‑specific security risks, including prompt injection, data poisoning, model leakage, unauthorised access, sensitive data exposure, and other emerging threats, and implementing appropriate security controls.Managing and administering PKI environments, including the full lifecycle management of digital certificates.Participating in security investigations and contributing to the continuous improvement of security controls and protection mechanisms.Collaborating with infrastructure, cloud, development, and governance teams to ensure security is integrated throughout the technology landscape.YOUR TEAMYou will join the Security Operations team composed of approximately 25 cybersecurity professionals within a broader Cybersecurity department of around 60 specialists. The team brings together a diverse range of expertise across incident response (CSIRT), Security Information and Event Management (SIEM), Endpoint Detection and Response (EDR), antivirus management, SOC, network security, secure code reviews, container security, and cloud security.OUR OFFERA Senior Security Engineer function rich in responsibilities and challenges.Supportive and collaborative team environment.Tools and infrastructure that are consistently at the forefront of innovation.Personalised career support to help you with your development.Many training opportunities and certifications.A company with a friendly working atmosphere which is dynamic and oriented towards innovation.Fun times – a food truck, barbecue, after‑work events, family day.Complete salary package.Teleworking opportunities (up to 3 days a week).Job RequirementsYOUR PROFILEMinimum 5 years of experience in a Security Engineer or similar cybersecurity role.Proven expertise in vulnerability management, security remediation, and system hardening.Strong knowledge of Windows, Linux, Active Directory, networking, and cloud security principles.Hands‑on experience with vulnerability assessment and remediation tools.Experience securing cloud and hybrid environments.Knowledge of AI security concepts and emerging risks associated with Generative AI and Machine Learning technologies.Practical experience with PKI infrastructures and digital certificate lifecycle management.Ability to conduct in‑depth technical analyses and translate findings into actionable security recommendations.Strong analytical, problem‑solving, and communication skills.Ability to work independently while collaborating effectively with multidisciplinary teams.Soft SkillsStrong analytical and problem‑solving skills.Excellent communication skills.Critical thinking and risk‑based decision making.Proactive mindset and sense of ownership.
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