Security Administrator

Lynx Beleggen; Amsterdam; Hybrid; EUR 70,000 - 110,000; Full time

Benefits offered by this job

Training budget €2,000 per year

Hybrid work policy (Amsterdam/Berlin/G

German and English courses

Urban Sports Club discount

Trips & activities

Relaxed working environment

Job summary

Lynx Beleggen is seeking a Security Administrator to strengthen our cybersecurity posture in a fintech scale‑up. You will own security operations, implement Defender XDR and Sentinel, and drive incident response across IT and business teams.

The role requires hands-on experience with SIEM, incident response, and compliance frameworks (ISO27001, NIST, GDPR). You’ll develop playbooks, train staff, and help shape a security‑first culture while collaborating with offices in Amsterdam and beyond.

Qualifications

• Know-how to coordinate incident response across IT and security teams.
• Strong understanding of IT security principles and risk controls.
• Experience with security monitoring, threat hunting, and playbook development.

Responsibilities

• Lead the implementation and optimization of security tools, including Defender XDR and Sentinel; coordinate incident response activities.
• Manage security alerts and incidents, performing triage, root cause analysis, and post-incident reviews.
• Monitor and manage security operations to detect, investigate, and respond to threats across the organization.
• Develop and maintain incident response playbooks and procedures.
• Conduct threat hunting and analysis using Sentinel and Defender telemetry to improve detection rules.
• Collaborate with IT, information security, and business units to cover emerging threats.
• Continuously improve security posture by analyzing trends, implementing automation, and refining detection logic.
• Support compliance and audit activities by ensuring security policies and reporting align with requirements.
• Maintain and update security documentation, including runbooks and architecture diagrams.
• Train and support internal teams on security best practices and secure configuration standards.

Skills

Microsoft Defender XDR

Microsoft Sentinel

Incident response

SIEM

Automation scripting

IT security principles

Communication

Tools

MITRE ATT&CK

Job description

We’re looking for a skilled and proactiveSecurity Administrator ( M/F/D) to lead the charge in strengthening our cybersecurity posture. In this role, you’ll take ownership of our security operations—implementing and optimizing tools like Microsoft Defender XDR and Sentinel, driving incident response, and continuously improving detection and response capabilities. You'll work at the intersection of IT, security, and business teams to ensure our systems stay resilient against evolving threats, while supporting compliance and contributing to a security-first culture. If you're driven by impact, thrive in a fast-paced fintech scale-up, and enjoy turning complex challenges into robust solutions, we’d love to meet you.

What you’ll do:

• Lead the implementation and optimization of security tools, including Microsoft Defender XDR and SentinelLead and coordinate security incident response activities across IT and Security domains.
• Manage security alerts and incidents, performing triage, root cause analysis, and post-incident reviews.
• Monitor and manage security operations detect, investigate, and respond to threats across the organization in a timely manner
• Develop and maintain security incident response playbooks and procedures
• Conduct threat hunting and analysis using Sentinel and Defender telemetry to identify suspicious activity and improve detection rules using MITRE Attack framework
• Collaborate with IT, Information Security and business units to ensure detection rules cover emerging threats
• Continuously improve security posture by analyzing trends, implementing automation, and refining detection logic.
• Support compliance and audit activities by ensuring security policies, controls, and reporting align with internal and external requirements.
• Maintain and update security documentation, including runbooks, playbooks, and architecture diagrams.
• Train and support internal teams on security best practices, threat awareness, and secure configuration standards.

Your profile:

• Excellent knowledge of Microsoft Defender XDR and Microsoft Sentinel
• 5+ years experience in incidence response activities across IT and security domains,
• Strong Knowledge of IT Security principles
• Strong knowledge of ITIL, ISO27001, NIST CSF , GDPR and DORA is preferred.
• Proficient in SIEM and detection tools and scripting
• Strong process orientation: able to design, document, and roll out effective processes
• Strong communication skills, able to explain IT processes and best practices to non-technical audiences.
• Certifications (ITIL, CISSP, CISM, etc.) are valued but not required

What we offer:

• Competitive Salary, depending on your educational level and work experience
• Continuous growth potential and a training budget of €2,000 per year
• Trips & activities with your colleagues
• Relaxed and informal working environment
• Discount for membership of the Urban Sports Club
• In-house German and English courses with a native speaker and cover half of the costs
• A fintech scale-up environment: fast-moving, collaborative, and impact-driven.
• Hybrid work policy with offices in Berlin, Amsterdam, or Ghent.
• Opportunity to shape and professionalize IT services for a 250-person organization.
• A culture that values initiative, ownership, and continuous improvement.

We're an equal-opportunity employer. We welcome applications from all suitably qualified and eligible candidates without attention to gender identity/expression, age, racial, ethnic and cultural background, religion and beliefs, sexual orientation/identity, disability or neurodiversity.