Security Engineer

Fujitsu; Brussel Hoofdstad; Hybrid; EUR 111,000 - 166,000; Full time

Job summary

Fujitsu Limited seeks a Senior IT Security Engineer for a freelance assignment in Brussels. The role focuses on maintaining and improving security solutions, IAM, and strong authentication across systems.

Fluency in Dutch and/or French and English is mandatory, with a hybrid work setup in Brussels. The consultant will lead security tooling configuration, threat detection improvements, and risk-aware security guidance for cross-functional teams.

Qualifications

• Experience with SSDLC, RUP, and Agile methodologies.

Responsibilities

• Analyze and define security requirements for systems, applications, and services.

Skills

SSDLC

RUP

Agile methodologies

OAuth

OpenID Connect

IAM concepts

OpenLDAP

Active Directory

Linux/Windows scripting

Security solutions

Tools

Auth0

Okta

SailPoint

Job description

Freelance Opportunity: Senior IT Security Engineer

Languages: Dutch and/or French (mandatory) and English (mandatory)

About the role

For one of our clients, we are looking for a Senior IT Security Engineer to ensure the reliable operation, maintenance, and continuous improvement of the organization's security solutions.

The consultant will contribute to security-related projects, manage identity and access management systems, configure security tools, and provide expert guidance on authentication and authorization protocols, including OAuth and OpenID Connect.

The role also involves strengthening security procedures, improving threat detection capabilities, and supporting employee awareness and training initiatives. The assignment follows a hybrid working model based in Brussels.

Key responsibilities

• Analyze and define security requirements for systems, applications, and services.
• Configure, maintain, troubleshoot, and optimize security tools and infrastructure.
• Manage identity components, user accounts, and provisioning processes.
• Implement and maintain access management solutions to ensure secure authentication and authorization.
• Monitor security systems and improve observability to support threat detection and incident response.
• Protect systems against unauthorized access and security breaches.
• Develop security procedures and recommend improvements to security policies.
• Provide expert technical advice on authentication protocols, particularly OAuth and OpenID Connect.
• Advise technical teams, management, and other stakeholders on security best practices and risk mitigation.
• Promote security awareness and support employee training initiatives.
• Collaborate with cross-functional teams to implement security improvements.

Required profile

• Experience with Secure Software Development Life Cycle (SSDLC), Rational Unified Process (RUP), and Agile methodologies.
• Strong knowledge of authentication protocols and identity providers, including OAuth, OpenID Connect, OpenLDAP, and Active Directory.
• Solid understanding of Identity and Access Management (IAM) concepts and solutions.
• Knowledge of application firewalls and web services security.
• Practical scripting experience in Linux and/or Windows environments.
• Experience administering, troubleshooting, and continuously improving security solutions.
• Network security experience is an advantage.
• Fluency in Dutch and/or French, with a good command of the other language.
• Strong command of English.
• Excellent communication skills and the ability to explain technical security matters to different audiences.
• A proactive mindset, with a strong focus on operational reliability, risk management, and continuous improvement.

Nice to have

• Knowledge of web services in Auth0.
• Experience with Okta identity management solutions.
• Familiarity with SailPoint identity governance.