Senior Cybersecurity Threat Hunter

Posted 4 Days Ago
Be an Early Applicant
Hiring Remotely in Brussels, BEL
In-Office or Remote
Senior level
Information Technology
The Role
Lead and manage the threat hunting program: plan and execute hunts, research threats, analyze SIEM/EDR/data-lake telemetry, develop detection use cases and automation, support incident response and red/purple team validation, produce executive reporting, and mentor junior hunters to improve detection coverage.
Summary Generated by Built In

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.

Skills Required

  • 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 operationalising threat intelligence to support proactive hunting and detection engineering
  • Proven experience developing and improving detection coverage and converting intelligence into detection use cases
  • Hands-on experience with OpenTIDE or an equivalent detection content management platform
  • Strong practical experience with SIEM platforms, in particular Splunk Enterprise Security
  • Experience with Risk Based Alerting or equivalent technologies for detection engineering and alerting
  • Strong practical experience with EDR solutions
  • Ability to produce clear, structured, and actionable reporting for technical and non-technical audiences
  • Strong coordination skills with internal teams, business representatives, and external partners
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The Company
HQ: Athens
962 Employees
Year Founded: 1964

What We Do

Uni Systems, a member of Quest Group, has been a reliable ICT partner to companies and organizations in the European market for over 60 years. We are the first IT company founded in Greece, in 1964, and we have been supporting our clients ever since. Trusting customers, extensive solutions offering, strong partnerships and experienced people, those are the main grounds for Uni Systems’ rapid expansion of operations across geographies and industries. With more than 1450 specialized ICT professionals, established presence in more than 20 countries, and branches and subsidiaries in the heart of the European Union (Athens, Barcelona, Brussels, Bucharest, Luxembourg and Milan), we are effectively addressing the needs of European and International organizations and institutions and delivering value-added integrated solutions to our customers. Through our strong industrial vertical expertise, supported by the range of our horizontal solutions, we hold a substantial and successful track record in the delivery and implementation of large-scale, mission-critical projects in the sectors of Banking & Finance, Enterprise & Utilities, Government, and Telecommunications, as well as in EU Institutions and Agencies. Participations in real commercial implementations of best practices (i.e. ITIL, RUP, PRINCE2, PMI), has provided our people with significant experience, unique know-how and proven capability in designing, implementing and successfully supporting complex ICT projects, through a range of solutions and business areas. At Uni Systems, we support innovation, and we have been investing in the European and National research ecosystem. Our Research and Innovation (RDI) department has been successfully bidding and winning a series of research programs in promising technological areas, such as 5G, AI in Health, and Blockchain in Governance. Enabling our clients' digital transformation journey is our passion and we remain strongly committed to it.

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