Senior Cyber Defense Specialist

Senior Cyber Defense Specialist

Protect critical infrastructure in a tierless Next Gen SOC. As a Senior Cyber Defense Specialist you lead threat hunting, detection engineering and incident response to boost Enexis' digital resilience.

Will you help us keeping our energy system secure and future‑proof? Enexis is at the heart of the energy transition and, as a regional grid operator, is a crucial part of the critical infrastructure in the Netherlands. That makes our digital environment interesting for attackers – and challenging for you as a Cyber Defense Specialist.

We are building a Next Generation Security Operations Center: a SOC driven by technology, automation and continuous improvement. Not a security "assembly line", but a smart combination of:

• Analysis (reactive) - responding quickly and effectively to signals and incidents
• Threat hunting (proactive) - actively searching for threats
• Detection engineering (improvement) - making our detections smarter every day

with the team and its members at the heart of our operations. Our core principles: risk‑driven operations and minimizing manual work.

As a Senior Cyber Defense Specialist, you are one of the driving forces in our tier‑less SOC. You are a creative problem solver with a strong security engineering mindset. Your motto is: "work smarter, not harder".

• You have experience with:
• Threat Intelligence and hunting:
• Creating threat landscape insights that are relevant for Enexis.
• Translating new and known threats into concrete actions and improvements.
• Developing hunting hypotheses and performing advanced hunts.
• Detection Engineering:
• Designing, building and maintaining (use case lifecycle management) advanced detection rules focused on APTs.
• Developing scripts, integrations and automations to improve detection and data analysis.
• Incident Triage and Response:
• Performing in-depth investigations and response activities (containment, eradication, recovery).
• Preparing the entire SOC team through trainings and exercises.
• Ensuring knowledge transfer and continuous improvement of response processes.
• Taking the lead in complex or critical security incidents.
• Designing, implementing and improving threat hunting, incident response and detection engineering activities. This means you:
• Have a clear understanding of the environment (business processes, digital landscape, chain dependencies), enabling you to accurately assess the impact of threats.
• Know advanced attack techniques (TTPs) and how to counter them with smart detection engineering and targeted hunts.
• Not only build detection logic, but also ensure our detection library is kept up to date, that we regularly test our detection logic, and adjust it where needed.
• Building and maintaining automation (SOAR) and integrations to reduce manual work.
• Developing an in-depth understanding of our infrastructure and our attack surface.
• Participating in our stand‑by shifts, contributing to our 24/7 resilience by performing.
• Working closely with IT, OT SOC and security teams to sustainably mitigate risks and embed lessons learned.
• Coaching colleagues within the SOC and promoting knowledge sharing and a culture of continuous improvement.
• Keeping up with developments in the security domain and translating them into concrete improvements of our SOC capabilities.

Het salaris bedraagt €5.592 - €7.989.

• Er is geen minimale opleiding vereist
• Je beheerst Engels

€5.592,- tot €7.989,-