Senior Cybersecurity Engineer (Contract)

Location: Brussels or Luxembourg (Onsite)

Daily Rate: €580 per day

Contract Duration: 1st January 2026 – 31st May 2026 with extensions thereafter

Application Deadline: 3rd December 2025

About the Role

We are seeking a highly experienced and proactive Senior Cybersecurity Engineer

You will play a pivotal role in strengthening the security posture by taking ownership of critical systems like SIEM (Splunk), SOAR, and CTI platforms, while also guiding the implementation and management of a broader suite of security tools.

Key Responsibilities

• SIEM & Log Management Mastery:
• Engineer, deploy, operate, and maintain Splunk Enterprise and Splunk Enterprise Security.
• Manage the entire Splunk infrastructure (forwarders, indexers, search heads).
• Deploy and maintain parsing definitions for diverse log sources.
• Ensure the reliability and efficiency of event log collection and analysis processes.
• Security Solutions Engineering:
• Deploy and manage a variety of cybersecurity tools, including vulnerability scanners, surface attack monitoring tools, and secret management solutions.
• Documentation & Process:
• Draft comprehensive documentation, including architecture designs, operating procedures, and log collection definitions.
• Manage changes in a structured, controlled manner.
• Collaboration & Support:
• Act as a subject-matter expert, supporting other teams in the effective usage of cybersecurity solutions.

Your Profile: Expertise & Experience

Essential Qualifications & Experience:

• Master's degree in a relevant field.
• Minimum of six years of professional experience in cybersecurity.
• At least three years in ICT security management (e.g., ISMS, policy development).
• At least two years in a team lead or project lead capacity for major security projects.
• Hold at least one recognised ICT Security professional certification (e.g., CISSP, CISM, GIAC, Splunk certifications).

Required Technical Expertise:

• Deep Splunk Knowledge: Proven hands-on experience with engineering and administering Splunk Enterprise and Splunk ES.
• Core Security Domains: Strong knowledge of Identity & Access Management (IAM), endpoint security, and network security concepts (Firewalls, Proxies, IDS/IPS).
• Operating System Security: Expert-level skills in both Windows Security (Active Directory, hardening) and Linux Security (hardening, monitoring).
• Cloud Security: Hands-on experience with Microsoft cloud security tools (Sentinel, Entra ID, Defender) and/or AWS security services (GuardDuty, Security Hub). Knowledge of container security is a plus.
• Governance & Compliance: Familiarity with risk assessment methods (e.g., ISO 27005, EBIOS), ITIL, COBIT, and business continuity planning.

The Ideal Candidate Will Be:

• A leader and a consultant with a strong ability to guide and influence.
• Highly flexible, with the capability to manage several confidential tasks in parallel.
• Proactive, results-driven, and possesses excellent communication skills.

Other Requirements

• EU Nationality or a valid work permit for Belgium or Luxembourg is mandatory.
• This role is onsite at the customer's premises in either Brussels or Luxembourg.

How to Apply

Please submit your CV by 3rd December 2025.

Note: Only shortlisted candidates who meet the essential criteria will be contacted.