About Atos Group

Atos Group is a global leader in digital transformation with c. 54,000 employees and annual revenue of c. €7.2 billion (at the go-forward perimeter), operating in 54 countries under two brands - Atos for services and Eviden for products and systems. European number one in cybersecurity and a leader in cloud, Atos Group is committed to a secure and decarbonized future and provides tailored AI-powered, end-to-end solutions for all industries. Atos Group is listed on Euronext Paris.

About Eviden

Eviden is the Atos Group brand focused on cybersecurity products, mission-critical systems and vision AI. A trusted partner to public and private sector organizations, Eviden deploys advanced analytics capabilities and helps ensure the robustness, continuity and resilience of its customers’ operations. Leveraging more than 2,200 experts and 720 patents, Eviden helps protect people, data and critical infrastructures worldwide, at the convergence of intelligence, sovereignty and trust.

Role overview

We are looking for a senior, hands-on penetration tester who can independently deliver end-to-end security assessments across web applications, APIs, internal and external infrastructure and, where required, mobile applications and security configurations. The role requires strong technical ownership, clear reporting and direct collaboration with customer technical teams.

Key responsibilities

• Plan and execute penetration tests for web applications, APIs, internal and external infrastructure and other approved targets.
• Identify, validate and safely exploit vulnerabilities within the agreed scope and rules of engagement.
• Assess technical and business impact and provide clear, risk-based remediation recommendations.
• Produce high-quality technical reports with reproducible evidence and executive-level summaries.
• Present findings to customer technical teams and support remediation clarification and retesting activities.
• Contribute to methodology improvements, knowledge sharing and the development of junior and mid-level team members.
• Maintain strict confidentiality and follow legal, ethical and engagement-specific requirements.

Required experience and skills

• Strong hands-on experience in web application and API security testing.
• Solid experience in external and internal network and infrastructure penetration testing.
• Ability to validate vulnerabilities, perform controlled exploitation and explain associated business impact.
• Experience preparing clear, evidence-based reports and practical remediation guidance.
• Ability to deliver assessments independently and manage technically complex engagements.
• Strong written and verbal communication skills in English.

Preferred qualifications

• EU/NATO Secret Clearance
• Hands-on mobile application security testing experience.
• Experience with security configuration reviews and static or dynamic application security analysis.
• Relevant offensive security certification such as OSCP, or equivalent practical expertise.
• Experience in customer-facing consulting and regulated enterprise environments.

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Here at Atos, diversity and inclusion are embedded in our DNA. Read more about our commitment to a fair work environment for all.

Atos is a recognized leader in its industry across Environment, Social and Governance (ESG) criteria. Find out more on our CSR commitment.

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