Senior Cybersecurity Threat Hunter

Uni Systems

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Brussels, Brussels, Belgium remote Until 10/5/2026 2+ years exp First posted August 6, 2026 Last posted August 6, 2026
Job description

At Uni Systems, we are working towards turning digital visions into reality. We are continuously growing and we are looking for a Senior Cybersecurity Threat Hunter to join our UniQue team.

What will you be doing in this role?

  • Lead and manage the threat hunting program, including campaign planning, prioritization, execution, and reporting.
  • Conduct threat research, develop hunting hypotheses, and identify detection gaps to improve security monitoring.
  • Analyze security telemetry from SIEM, EDR, data lakes, and other sources to identify advanced threats.
  • Develop and enhance threat detection use cases, detection models, and engineering frameworks (e.g., OpenTIDE).
  • Design, automate, and maintain threat hunting workflows, playbooks, integrations, and IoC retro-hunting capabilities.
  • Support incident response investigations, purple team exercises, and validation of new detection capabilities.
  • Collaborate with Incident Response, Threat Detection, Threat Intelligence, Malware Analysis, Red/Purple Teams, and external partners (e.g., CERT-EU).
  • Prepare executive briefings, campaign reports, and investigation summaries for senior management.
  • Mentor and train junior threat hunters while promoting threat-informed detection practices.
  • Continuously improve detection coverage by incorporating lessons learned from incidents, red teaming, and threat intelligence.

Requirements

What will you be bringing to the team?

  • Master's Degree in Computer Science, with a focus on Cybersecurity.
  • Minimum 2 years of experience leading Threat Hunting activities in a SOC/CSOC or equivalent environment.
  • Proven experience in operationalising threat intelligence to support proactive hunting and detection engineering.
  • Proven experience in developing and improving detection coverage to ensure that intelligence driven priorities are converted into timely and relevant detection use cases aligned with CSOC operational needs.
  • Hands on experience with OpenTIDE or an equivalent detection content management platform.
  • Strong practical experience with SIEM platforms, in particular Splunk Enterprise Security, Risk.
  • Based Alerting, or equivalent technologies, for detection engineering, alerting, and use case development.
  • Strong practical experience with EDR solutions.
  • Ability to produce clear, structured, and actionable reporting, including threat assessments and strategic or operational reports, for both technical and non technical audiences.
  • Strong coordination skills with internal teams, business representatives, and external partners.

At Uni Systems, we are providing equal employment opportunities and banning any form of discrimination on grounds of gender, religion, race, color, nationality, disability, social class, political beliefs, age, marital status, sexual orientation or any other characteristics. Take a look at our Diversity, Equality & Inclusion Policy for more information.

About this role

Summary

Lead threat hunting, analyze security telemetry, develop detection use cases, and mentor junior hunters.

Job title

Senior Cybersecurity Threat Hunter

Experience level

2+ years

Minimum experience

2+ years exp

Industry

technology

Location requirements

Brussels, Belgium; remote not specified

Salary

Not specified

Management role

No

Skills & keywords

Required skills

threat huntingSIEMSplunkEDROpenTIDEdetection use casesalerting

Preferred skills

None specified

Specializations

threat huntingSIEMEDRdetection engineeringthreat intelligence
Locations

Structured locations inferred from the posting.

Brussels, Belgium

On-site City

Brussels, Belgium

Remote City