Senior Security Engineer

Mission Overview:

Keystone Solutions is seeking a Senior Security Engineer for a consultancy mission at a client site. In this role, you will ensure the reliable day-to-day operation of security solutions and contribute to projects that evolve and strengthen these systems.

Key Responsibilities:

• Analyze and define security requirements.
• Configure, support and maintain security tools.
• Manage identity components, user accounts and provisioning processes.
• Set up and maintain access management components.
• Monitor security systems and improve observability.
• Defend systems against unauthorized access.
• Develop security procedures and make policy recommendations.
• Provide technical security advice, including expert guidance on OAuth and OpenID Connect.
• Advise staff, managers and executives on security best practices.
• Support employee awareness of security procedures.
• Train employees in security procedures.

Candidate Profile:

You are looking for a hands-on role combining operational security responsibilities with improvement projects. You want to strengthen identity and access management, authentication, and infrastructure security. You aim to translate security requirements into practical solutions and clear recommendations while sharing your technical expertise and collaborating effectively with colleagues across the organization. You maintain and continuously update advanced knowledge of systems and methods in line with the current state of the art.

Requirements:

• Experience working with SSDLC, RUP, and Agile approaches.
• A good understanding of authentication protocols and providers, including OAuth, OpenID Connect, open LDAP, and Active Directory.
• Solid knowledge of identity and access management concepts and solutions.
• Knowledge of application firewalls and web services.
• Practical scripting knowledge in Linux and/or Windows environments.
• Previous experience in network security is considered an asset.
• Knowledge of web services in Auth0 is a plus.

Personal Attributes:

You are an experienced Security Engineer with a practical, solution-oriented mindset. You are comfortable administering, troubleshooting, and continuously improving security solutions. You are a clear communicator who can provide sound technical advice to different audiences. You are proactive and attentive to reliable operations, security risks, and continuous improvement. You are fluent in Dutch or French (with a good command of the other language) and have a strong command of English.

What We Offer:

A pleasant and stimulating working environment with plenty of room for initiative. You will have the opportunity to contribute to security capabilities that support notaries and the public.

Work Environment:

This position offers a hybrid working model, with the flexibility to work from home up to three days a week, while two days per week in the office are required.

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

Duration: As soon as possible - 31/12/2026 3 months • (full time)

Skills required:

• Active Directory - Level: Advanced - Most recent: Any time
• Agile - Level: Intermediate - Most recent: Any time
• Identity and Access Management (IAM) - Level: Advanced - Most recent: This year
• OAuth - Level: Advanced - Most recent: This year
• Okta - Level: Intermediate - Most recent: Any time
• Open ID Connect - Level: Intermediate - Most recent: Any time
• SailPoint - Level: Nice to have - Most recent: Any time
• SSDLC - Level: Intermediate - Most recent: Any time

Language requirements:

Dutch or French
Level Full professional proficiency
English
Level Full professional proficiency
Documents to be completed
NDA_Fednot.docx