Senior Penetration Tester / Security Engineer (m/f)

Job Description

Join ARHS Group, part of Accenture, as a Senior Penetration Tester / Security Engineer (m/f), and bring your security expertise to projects that are shaping the digital future of Europe.

If you’re passionate about application security, comfortable with tools like Burp Suite, Nmap, Metasploit, or Nessus, and active on platforms like HackerOne, Hack The Box, or TryHackMe—then we’d love to meet you.

You’ll become a key member of our internal cybersecurity team in Luxembourg, contributing to high-impact projects for major European institutions, all while working in a dynamic and innovation-driven environment.

THE WORK:

• Perform automated and manual penetration testing on web and mobile applications, as well as on cloud and on-premise infrastructures.
• Identify and help mitigate vulnerabilities, proposing secure architecture improvements and solutions.
• Provide support to development teams, promoting secure coding practices and integrating security into the software development lifecycle (DevSecOps).
• Work closely with customers to understand their security needs and ensure those are effectively met.
• Analyse and enhance current penetration testing methodologies.
• Write and present concise, technical, and actionable reports.
• Contribute to internal knowledge sharing and continuous team development.
• Act as a security advocate within the organization, driving innovation and improvement.

The work location for this role is an ARHS – Part of Accenture office.

Our roles require in-person time to encourage collaboration, learning, and relationship-building with clients, 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:

• A Master’s degree in Computer Science, Information Security, or equivalent (or solid practical experience in cybersecurity).
• 4+ years of professional experience in penetration testing or red teaming.
• Proven experience with internal pentests and/or red team exercises.
• Strong knowledge of common penetration testing tools and techniques.
• Ability to think critically, learn fast, and stay up to date with emerging threats and vulnerabilities.
• Proficiency in writing clear and detailed technical reports.
• You have or are planning to pursue one or more of the following: OSCP, OSWE, eCPPTv2, CHFI, GIAC GPEN.

Technical environment:

• Security standards: OWASP Top 10, MITRE ATT&CK
• Tools: Burp Suite Pro, Kali Linux, Nessus, Metasploit, Nmap
• DevSecOps principles and secure SDLC
• Programming/scripting: Java, C/C++, PHP, Python
• Networking: OSI/TCP stack, network protocols
• Cloud: Familiarity with AWS and/or Azure environments
• Methodologies: Agile practices

BONUS POINTS IF YOU HAVE:

• Previous experience in software development.
• Hands-on experience in bug bounty programs or exploit development.
• Holding AWS Certified Security, Azure Security Engineer Associate certifications.

Additional Information

Arηs Group – Part of Accenture - is a market leader in the management of complex IT projects and systems. Founded in Luxembourg in 2003, we have grown to encompass 11 entities worldwide, employing over 2,500 employees in Luxembourg, Belgium, Greece, Italy and Bulgaria.

With our focus on getting things done, we help our clients achieve their goals with best-of-breed solutions, superior execution and exceptional services. We offer bespoke software development, data science, infrastructure, digital trust and mobile development to government institutions at national and European level, telecom providers, and financial institutions, among others.

Our bold company culture is built around working hard and playing hard, with a flat and agile structure that lends itself to efficiency and employee empowerment. We value our diverse workplace of close-knit teams and provide a place where everyone can be supported to learn and evolve. 

Our Vision and Values

Our vision is to be the most caring and reliable IT company on the market place for both clients and our people.

Our values are: caring, agility, excellence, innovation, continual improvement, and reliability.

Our values support our vision by leveraging excellence, striving for results, ensuring commitment and promoting adaptability.

Our Culture

We work in close partnership with our customers, turning their needs into benefits; We promote a dynamic local environment where both young and experience people can realize themselves; We leverage a flexible, independent and responsive organization.

Our Brand

The ArȠs (pronounce [aris]) name comes from Greek Mythology. ArȠs is the son of Zeus and the God of War – in our eyes, an accurate representation of the intelligence, strategy, leadership and vision that are essential in business.

Don’t hesitate! Join our team

What you’ll get:

An informal hierarchy and work environment:

Our open, flat structure supports a strong focus on communication and collaboration, enabling to respond quickly to market changes and customer requests.

An attractive salary package:

With an attractive salary and benefits package – including advantageous fringe benefits – you’ll be paid for what you love to do.

A strong corporate culture:

You’ll join a dynamic team of smart and ambitious people. From the way we hire, to the way we relate to our clients – our values from the foundation of the way we work.

Learning & development opportunities:

We constantly invest in our people and are committed to providing individual development opportunities to help you continue to grow and stay happy and satisfied at work.

Exciting projects:

You’ll take ownership of various projects for both public and private clients: calling for creativity and innovation, at the cutting-edge of technology.

A rock solid company:

With more than 200 customers by 2023, you’ll join a business with a sustainable and growth-oriented plan.

But let’s talk about it face to face!

You have the qualities as listed above? Please, apply & send us your CV, which will be processed in full confidentiality.

You don’t have all the above requirements but own a great part of them? You can send us your CV too because we will give you the opportunity to grow up with us.