Security Operations Lead: Defender XDR & Sentinel

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

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.