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Atos

Global IT services, consulting, digital transformation

Leading Expert Cyber Security

Offensive Security & TestingConfirmed live in the last 24 hours
Full-timeVienna, Austria€95k /yr

About the Job

Requirements

  • A successfully completed degree in IT Security, Cyber Security, Computer Science, Business Informatics, or a comparable field.
  • At least 3–4 years of relevant professional experience in Offensive Security, including at least 2 years in Red Teaming projects or complex infrastructure penetration tests.
  • Substantial experience performing manual penetration tests of internal and external networks, Windows and Linux systems, Active Directory environments, and infrastructure components.
  • Strong understanding of network technologies, operating systems, authentication mechanisms, network segmentation, hardening concepts, and typical corporate infrastructures.
  • Experience planning and conducting realistic attack simulations and chaining vulnerabilities into comprehensible attack paths.
  • CRTO or CRTL certification is mandatory, along with at least two additional relevant Offensive Security certifications, such as OSCP, OSEP, CPTS, OSWE, PNPT, or equivalent.
  • Experience creating clear technical reports and presenting complex attack scenarios and risks understandably.
  • Very good spoken and written German and English.

Responsibilities

  • Plan and conduct realistic attack simulations and technical security assessments against customers’ IT systems, networks, and infrastructure.
  • Build and further develop the Red Team, providing functional leadership focused on coaching, quality assurance, and methodological improvement.
  • Identify, analyze, and exploit vulnerabilities in internal and external networks, server environments, operating systems, security appliances, and other infrastructure components.
  • Conduct manual infrastructure penetration tests, Active Directory assessments, network segmentation checks, and reviews of hardening measures and security configurations.
  • Develop and use customized attack techniques, tools, exploits, and attack paths to realistically represent modern threat scenarios.
  • Chain individual vulnerabilities into complex attack scenarios to explain actual risks and potential customer impact.
  • Prepare high-quality reports on vulnerabilities, attack paths, and technical risks, including practical recommendations and tailored countermeasures.
  • Work with Blue Teams to improve detection and defense strategies and participate in Purple Team exercises to translate attack findings into defensive measures.
  • Help develop new attack vectors, testing methods, and procedures for Red Team engagements and infrastructure security assessments.
  • Deliver internal knowledge-sharing presentations, conduct reviews, and coach new employees.

About the Company

Atos

Global IT services, consulting, digital transformation

Atos is a global IT services and consulting firm that helps big companies and governments run and improve their digital systems. It offers services like cloud computing, cybersecurity, big data, and digital transformation, delivering these through consulting, system integration, outsourcing, and managed services to keep complex IT environments functioning smoothly. What sets Atos apart is its long history of growth by acquiring other firms, building a wide footprint across Europe and North America, and combining diverse capabilities into one large service provider. After a period of financial restructuring to reduce debt, Atos is focused on stabilizing its finances and returning to growth and more acquisitions by 2026.

Company size
10,001+
Company stage
IPO
Headquarters
Bezons, France
Founded
1997

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