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Date:  23-Sep-2022
Company:  CETIN Bulgaria

Sofia, BG

Security Engineer - Infrastructure Protection

As one of the biggest telecommunications infrastructure services providers in the region CETIN Group is at the forefront of digital transformation. It is present with subsidiaries in four countries, Bulgaria, Hungary, Serbia and the Czech Republic offering cutting edge technology solutions. In total, the Group employs nearly 3,000 people. 


CETIN Bulgaria owns and operates one of the largest telecommunication networks in Bulgaria. We are committed to provide high quality solutions reflecting the technological requirements of our customers. Our main focus is to develop top-quality and deploy the best in class telco infrastructure, and  the meet challenging market demands.


We work with highly skilled, highly motivated, world class experts. Join CETIN and be part of this team!


Security Engineer - Infrastructure Protection



Conduct and respond to vulnerabilities by analysing, prioritizing, remediating, and reporting on findings. Also, you’ll perform operating system and network hardening (e.g. Windows, Linux), recommend automated and proactive security measures to improve our security posture, and design, build and maintain security tools that support host, network, identity access, runtime applications, and infrastructure.



  • Oversee and coordinate the Vulnerability, Patch management and system/network hardening activities. Operate CIS Benchmark tools to establish minimum security requirements. Responsible for CIS policy hardening benchmark management, alongside the Infrastructure and IT teams, to own, create, and tune a standard hardening process. Design and deploy and test on the systems via CIS benchmark, run compliance scans against CIS requirements
  • Setup hardened systems as a baseline for installations using CIS and the best practices
  • Conduct compliance checks for customers environment based on CIS benchmarks. Where there are non-existent benchmark, recommend an appropriate baseline for compliance checks on those technologies
  • Provide local advisory and support on the systems hardening and automation tools
  • Implement and manage the local patch management activities to implement the latest patches on Ad-hoc or regular basis; Follow up on critical notifications from the vendors on emergency patches
  • Review any recent vulnerabilities made public to ensure that they addressed appropriately, and coordinate efforts between multiple teams to addressed them in a timely manner
  • Ensure that the company assets are being consistently scanned, patched and the respective vulnerabilities are remediated




  • BS degree in Computer Science, Security, Technology or related
  • Min 3 years of experience on relevant position
  • Fluent in English, both written and spoken
  • Industry recognized certificates will be advantage (e.g. CISA, CISM, CISSP)
  • In-depth understanding of various operating systems including OS hardening and CIS benchmark, system vulnerability.
  • Experience with network security, vulnerability management, incident response, CIS Benchmark assessments
  • (SCCM) Patch automation knowledge or any other automation techniques
  • Solid ability to understand vulnerability ratings, criticality and impact
  • Solid Experience with hardening clients, servers and networks services



  • Positive workplace culture where you would receive all the support you need from your peers and managers in order to achieve your personal and team goals
  • Preferential prices for mobile devices and accessories
  • Unlimited mobile services and mobile internet
  • Flexible working hours
  • Monthly food and gift vouchers
  • Transportation allowance
  • Additional health insurance


Only short-listed candidates will be contacted. All applications will be treated in strict confidentiality and in compliance with applicable law regarding personal data protections

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