Offensive Security Engineer
Thales
Offensive Security Engineer
Thales
Global defense and aerospace electronics
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
Thales designs and delivers critical technology for aerospace, defense, and digital security. Its products include electronics, software, and data-security systems that power air travel, payments, and modern military platforms, by integrating hardware and software to build systems such as avionics, radar, cybersecurity, and secure communications that collect sensor data and protect networks. It stands out through deep industrial experience, end-to-end solutions across defense, aerospace, and cybersecurity, and a focus on AI and quantum tech, aided by strategic acquisitions and partial state ownership. Its goal is to provide reliable, secure, and connected technologies that support national security, public safety, and everyday life by solving complex security and connectivity challenges.
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