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