Senior Security Engineer

Keystone Solutions; Brussel Hoofdstad; Hybrid; EUR 75,000 - 110,000; Full time

Benefits offered by this job

Hybrid work model

Job summary

Keystone Solutions seeks a hands-on Senior Security Engineer for a consultancy mission at a client site, combining operational security with improvement projects. You will strengthen identity and access management, authentication, and infrastructure security, translating requirements into practical solutions while sharing expertise across the organization.

You will stay current with state-of-the-art security practices, advising across staff and executives, and contributing to secure operations

Qualifications

• Experience with SSDLC, RUP, and Agile approaches.
• Strong understanding of authentication protocols and providers (OAuth, OpenID Connect, OpenLDAP, Active Directory).
• Solid knowledge of IAM concepts and solutions.
• Knowledge of application firewalls and web services.
• Scripting in Linux and/or Windows environments.
• Previous experience in network security is a plus.
• Knowledge of Auth0 web services is a plus.

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, incl. 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.

Skills

Active Directory

AGile

Identity and Access Management

OAuth

Okta

Open ID Connect

SailPoint

SSDLC

Job description

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.

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