Offensive Security Engineer
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About the Role
We are looking for a skilled Penetration Tester to support offensive security assessments and incident response activities across enterprise environments. In this role, you will identify vulnerabilities, simulate real-world attack scenarios, and collaborate closely with DFIR, SOC, and security operations teams . The position combines advanced penetration testing with hands‑on support during cyber incidents, threat investigations, and continuous security improvement initiatives.
Key Responsibilities
- Conduct web, network, cloud, and Active Directory penetration tests using modern offensive security techniques and tools. - Support incident response engagements , including forensic analysis, threat hunting, containment validation, and attacker activity reconstruction. - Prepare detailed technical reports and executive summaries with clear, actionable remediation recommendations. - Collaborate with blue team, DFIR, SOC, and security engineering teams to improve detection capabilities and validate security controls. - Contribute to strengthening the organization's cyber resilience through proactive testing and technical analysis.
Requirements
- Minimum 3 years of experience in penetration testing or offensive security roles. - Strong hands‑on experience in: - Web and API security testing - Network and infrastructure assessments - Cloud security testing - Active Directory security - Experience supporting or collaborating with incident response (DFIR) teams . - Ability to communicate technical findings clearly to both technical and non‑technical stakeholders . - Portuguese (C1) and English (C1) proficiency. - Availability for medium travel .
Preferred Qualifications
- Offensive Security certifications: - OSCP, OSEP, OSWE - SANS certifications: - GPEN, GCFA - Experience in: - Threat hunting and forensic analysis - Security validation and purple teaming - Attack simulation and adversary techniques
What We Offer
- Competitive compensation package and benefits. - Opportunity to work on advanced offensive security and incident response projects . - Continuous training and access to certifications and learning programs . - Collaborative environment with SOC, DFIR, and Threat Intelligence teams . - Hybrid/office flexibility (depending on local policy) and international exposure .
YOUR CAREER AT THALES
Future opportunities will allow you to discover other domains or sites. You will be able to evolve and grow your competences in different areas:
- Room and attention to personal development - Build your talents in another domain of Thales Group, discovering new products, new customers, new country or go to a more complex Solution - Choose between a technical expertise or a leadership path - Build an international career within a leading Engineering Group
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