Offensive Security Engineer (Penetration Testing | Red Team | Adversary Simulation)

About the Role

We are looking for a skilledPenetration Tester to supportoffensive security assessments andincident response activities across enterprise environments.

In this role, you will identify vulnerabilities, simulate real-world attack scenarios, and collaborate closely withDFIR, 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

• Conductweb, network, cloud, and Active Directory penetration tests using modern offensive security techniques and tools.

• Supportincident response engagements, including forensic analysis, threat hunting, containment validation, and attacker activity reconstruction.

• Preparedetailed technical reports and executive summaries with clear, actionable remediation recommendations.

• Collaborate withblue team, DFIR, SOC, and security engineering teams to improve detection capabilities and validate security controls.

• Contribute to strengthening the organization’scyber resilience through proactive testing and technical analysis.

Requirements

• Minimum3years 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 withincident response (DFIR) teams.

• Ability to communicate technical findings clearly to bothtechnical and non-technical stakeholders.

• Portuguese (C1) andEnglish (C1) proficiency.

• Availability formedium 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 onadvanced offensive security and incident response projects.

• Continuous training and access tocertifications and learning programs.

• Collaborative environment withSOC, DFIR, and Threat Intelligence teams.

• Hybrid/office flexibility (depending on local policy) andinternational 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