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

Location: Leca do Balio, Portugal

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