Penetration Tester / Security Engineer (m/f)

Luxembourg, Luxembourg, lu on site Until 9/5/2026 2+ years exp First posted July 7, 2026 Last posted July 7, 2026
Job description

Arηs Group, Part of Accenture, specializes in the management of complex public sector IT projects, including systems integration, informatics and analytics, solution implementation and program management. Our team helps lead clients through digital and information systems design, bringing expertise in a variety of areas ranging from software development, data science and security management to machine learning, cloud, and mobile development.

Arηs Group was acquired by Accenture in July 2024.

ARHS Group, part of Accenture, is looking for a Penetration Tester / Security Engineer (m/f) to join our Security Team in Luxembourg.

If you enjoy identifying vulnerabilities, assessing application and infrastructure security, and staying up to date with the latest attack techniques, we'd be happy to meet you. You'll work on a variety of security projects while collaborating with experienced security professionals in an international environment.

THE WORK:

  • Perform automated and manual penetration testing of web and mobile applications, as well as cloud and on-premises infrastructures.
  • Contribute to the continuous improvement of secure software development practices and promote security throughout the development lifecycle.
  • Identify security weaknesses and propose mitigation strategies or secure architectural improvements.
  • Analyze customer security requirements and recommend appropriate technical solutions.
  • Evaluate and improve penetration testing methodologies and security processes.
  • Prepare clear and concise technical reports with findings and recommendations.
  • Collaborate with developers and security engineers to improve the overall security posture of applications and infrastructures.
  • Share knowledge, contribute to team learning, and drive continuous improvement initiatives.

Our roles require in-person time to encourage collaboration, learning, and relationship-building with colleagues and communities. As an employer, we will be as flexible as possible to support your specific work/life needs.

HERE'S WHAT YOU'LL NEED:

  • Master's degree in Computer Science, Information Security, or a related field is preferred.
  • Minimum 2 years of experience in penetration testing or application security.
  • Experience performing internal penetration tests and/or participating in Red Team exercises.
  • Good knowledge of penetration testing tools such as Burp Suite Professional, Nmap, Metasploit, Nessus, and Kali Linux.
  • Good understanding of:
  • OWASP Top 10
  • MITRE ATT&CK
  • DevSecOps and Secure SDLC principles
  • OSI/TCP networking concepts
  • Cloud security principles (AWS/Azure)
    • Familiarity with one or more programming or scripting languages such as Java, C/C++, PHP, or Python.
    • Strong analytical, problem-solving, and communication skills.
    • Curiosity, creativity, and willingness to continuously learn new technologies and attack techniques.
    • Experience working in Agile environments.
    • Fluency in English (written and spoken).

BONUS POINTS IF YOU HAVE:

  • Experience developing custom exploits or participating in bug bounty platforms such as HackerOne, Hack The Box, or TryHackMe.
  • Previous experience as a software developer.
  • One or more of the following certifications:
  • OSCP
  • OSWE
  • eCPPTv2
  • CHFI
  • GIAC GPEN
  • AWS Certified Security – Specialty
  • Azure Security Engineer Associate
About this role

Summary

Perform penetration tests, analyze security, and improve security practices and architectures.

Job title

Penetration Tester / Security Engineer (m/f)

Experience level

2+ years

Minimum experience

2+ years exp

Industry

security

Location requirements

Luxembourg, on-site work only; no remote work.

Salary

Not specified

Management role

No

Skills & keywords

Required skills

penetration testing toolsOWASP Top 10MITRE ATT&CKDevSecOpsOSINTPythonNmapMetasploitNessus

Preferred skills

bug bountyexploit developmentsecurity certificationscloud security

Specializations

penetration testingapplication securitycloud securitysecurity assessment
Locations

Structured locations inferred from the posting.

Luxembourg

On-site City