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Ypto

Cyber Security Incident Response Team (CSIRT) Officer

Hybrid

Brussels, Belgium

Full Time

05-05-2025

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Job Specifications

Job Description

As a CSIRT Officer you will join the CISO Cybersecurity Center of Excellence team within the NMBS CISO organization . You will contribute to the daily security incident preparation, detection and response activities including threat detection, incident handling, threat hunting as well as propose and execute improvement actions, interact with the staff of NMBS (including its affiliates) and the security services providers.

Incident handling and response

As member of a dynamic CSIRT team you will need to be able to respond adequately to cyber security incidents by working together with fellow CSIRT officers and any possible stakeholders.

This Includes

Investigate and respond to level 3/4security incidents, including malware infections, network intrusions, and data breaches
Conduct forensic investigations, coordination and analysis of security incidents, regardless of IT, IoT or OT origin
Work closely with other members of the SOC, CSIRT and with other teams within the organization, to identify and mitigate security risks
Develop and implement incident response plans & procedures, and provide guidance to other members of the organization on security best practices
Communicate and report security incident progress to required internal and external stakeholders

Threat detection and hunting

As the CSIRT officer, you will also be responsible for threat detection and hunting. You will use your expertise in security operations to proactively identify threats and vulnerabilities within the organization's infrastructure with the help of the SIEM and custom detection tools. This will involve conducting regular threat hunting exercises to detect potential threats that may have evaded detection by traditional security measures. You will use a variety of tools and techniques to collect and analyze security data to identify anomalous behavior and potential indicators of compromise. Additionally, you will work closely with the the 3rd party SOC team to investigate potential security incidents and provide guidance on threat remediation and mitigation strategies. You are able to read and understand logs (Windows, Linux, network , etc) to analyze system artifacts for signs of compromise.

SIEM Engineering

You will play a critical role to ensure the organization's security posture remains strong. You will develop, maintain, and optimize our SIEM systems to ensure timely detection and response to security incidents. This will involve creating and maintaining use cases and detection rules (based on the MITRE ATT&CK framework), as well as writing playbooks for the SOC team to ensure consistent and effective incident response. Additionally you will automate the response to SIEM and EDR events as much as possible, in order to allow the SOC and the CSIRT to focus on the essentials.

Projects

Next to the core business of our team activities mentioned above, you will also contribute in different projects based on the needs of our team. This can include rolling out a new products or platforms, maintaining it, automate manual tasks with the help of scripts, …

Skills

Job requirements

Strong analytical and problem-solving skills, with the ability to identify and respond to security incidents in a timely and effective manner
Strong knowledge of security technologies and tools, such as SIEM, EDR, intrusion detection and prevention, firewalls, …
Strong understanding of networking protocols and technologies, as well as operating systems
Experience with security incident response tools and techniques, including forensics and/or malware analysis
Experience with threat hunting and the ability to identify and investigate suspicious activities on the network and systems
Experience with SOC Engineering and identifying gaps in our detection capabilities, as well as the ability to automate alert handling
Experience with one or more scripting languages: Python, Bash, PowerShell
Experience with query languages (Kusto Query Language, SPL, etc)
Experience with the administration of Linux systems
Familiar with cloud security concepts
Passionate about security monitoring, digital forensics, incident response, threat intelligence
Spoken and written fluency in Dutch or French
Spoken and written fluency in English
Customer focus and able to handle in an organization-sensitive way

Qualifications

Bachelor's degree in Computer Science, Information Security, related field or equivalent experience
At least 3-5 years of experience in a security-related role, with a focus on incident response and analysis
Relevant certifications, such as the GCIH, GCFE, GCFA, GNFA, GCIA, GREM or similar are a plus

Our offer

Benefits

Within our open corporate culture, you contribute to the digital transformation of SNCB. You will have a job with social impact and ample opportunity to make your own contribution. In addition to a good work-life balance and a competitive salary, you will receive the following benefits:

the possibility to work remotely + flexible working hours;
35 days of leave;
a company car + a public transport season ticket;
a target bonus;
a comprehensive insurance package (affiliation without own contribution, excl. outpatient costs for family members);
hospitalisation and dental care for the whole family;
outpatient costs (= medical costs separate from hospitalisation);
group insurance: supplementary pension, work disability and death (cafeteria plan);
accidents at work (extralegal);
meal vouchers and eco-vouchers;
net allowances for remote working and carwash + internet budget.

About the Company

As part of the railway family, we supply the necessary IT expertise to SNCB. Together with SNCB, we look for the best way to take travellers comfortably to their destination by fully focusing on modern and efficient railway traffic. Know more