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Salary
≈ $100k – $231k per year (Estimated)
Location
In office (Luxembourg City)
Seniority
Senior · 3+ years exp

Confirmed on the employer's own hiring board on Oct 15, 2026. First seen by Alion on Oct 15, 2026.

Overview
Company
Impact
Profile match

EY

Headquartered in London, United Kingdom, EY (Ernst & Young) is a multinational professional services network and one of the "Big Four" accounting firms. The organization provides financial assurance and auditing, tax advisory, management and technology consulting, and strategy and transactions advisory through its EY-Parthenon arm. Operating across more than 150 countries, it delivers risk management, digital transformation, data analytics, and regulatory compliance solutions to multinational corporations, financial institutions, and government entities worldwide.
Backed by ROPEA

At EY, you’ll have the chance to build a career as unique as you are, with the global scale, support, inclusive culture and technology to become the best version of you. And we’re counting on your unique voice and perspective to help EY become even better, too. Join us and build an exceptional experience for yourself, and a better working world for all.

Cyber threats, social media, massive data storage, privacy requirements and continuity of the business as usual require heavy information security measures. As an information security specialist, you will lead the implementation of security solutions for our clients and support the clients in their desire to protect the business. You will belong to an international connected team of specialists helping our clients with their most complex information security needs and contributing toward their business resilience.

Cybersecurity Senior (m/f)

Your key responsibilities

As part of our Penetration Testing team, you’ll identify potential threats and vulnerabilities to operational environments. Projects here could include penetration testing and simulating physical breaches to identify vulnerabilities.

Our professionals work together in planning, pursuing, delivering and managing engagements to assess, improve, build, and in some cases operate integrated security operations for our clients.

Skills and attributes for success

  • Perform penetration testing which includes internet, intranet, wireless, web application, social engineering and physical penetration testing.
  • Execute red team scenarios to highlight gaps impacting organizations security postures.
  • Ability to work both independently as well as lead a team of technical testers on penetration testing and red team engagements.
  • Identify and exploit security vulnerabilities in a wide array of systems in a variety of situations.
  • Perform in-depth analysis of penetration testing results and create report that describes findings, exploitation procedures, risks and recommendations.
  • Execute penetration testing projects using the established methodology, tools and rules of engagements.
  • Convey complex technical security concepts to technical and non-technical audiences including executives.

To qualify for the role you must have

  • Bachelor or Master’s degree in Computer Science, Cybersecurity, Information Systems, Information Technology, Engineering.
  • Minimum 3 years of related work experience in penetration testing which includes internet, intranet, web application penetration tests, wireless, social engineering, and Red Team assessments.
  • Experience with manual attack and penetration testing.
  • Experience with scripting / programming skills (e.g., Python, PowerShell, Java, Perl etc).
  • Updated and familiarized with the latest exploits and security trends.
  • Experience to lead a technical team to conduct remote and on-site penetration testing within defined rules of engagement.
  • Familiarity to perform network penetration testing in stealth manner.
  • Any of the following certifications: OSCP, OSWP, GPEN, GWAPT, OSCE, OSEE, GXPN.

Ideally, you’ll also have

  • Knowledge of Windows, Linux, Unix, any other major operating systems.
  • Familiarity with the latest exploits, tactics, techniques and procedures (TTP), vulnerability remediation and security trends in Cloud implementations.
  • Deep understanding of TCP/IP network protocols.
  • Deep understanding and experience with various Active Directory attack techniques.
  • Understanding of network security and popular attacks vectors.
  • An understanding of web-based application vulnerabilities (OWASP Top 10).

What we look for

We’re interested in intellectually curious people with a genuine passion for cyber security. With your specialization in attack and penetration testing, we’ll turn to you to speak up with innovative new ideas that could make a lasting difference not only to us - but also to the industry as a whole. If you have the confidence in both your presentation and technical abilities to grow into a leading expert here, this is the role for you.

What we offer

We will support you with career-long training and coaching to develop your skills. As EY is a global leading service provider in this space, you will be working with the best of the best in a collaborative environment. So, whenever you join, however long you stay, the exceptional EY experience lasts a lifetime.

  • Continuous learning: You’ll develop the mindset and skills to navigate whatever comes next.
  • Success as defined by you: We’ll provide the tools and flexibility, so you can make a meaningful impact, your way.
  • Transformative leadership: We’ll give you the insights, coaching and confidence to be the leader the world needs.
  • Diverse and inclusive culture: You’ll be embraced for who you are and empowered to use your voice to help others find theirs.

If you can demonstrate that you meet the criteria above, please contact us as soon as possible.

The exceptional EY experience. It’s yours to build.

Apply now.

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