Offensive Security Engineer: Pen Testing, Red Team & IR

Thales Group; Portugal; Hybrid; EUR 50,000 - 75,000; Full time

Benefits offered by this job

Hybrid/office flexibility

International exposure

Training & certifications access

Job summary

Thales Group is seeking a skilled Penetration Tester to drive offensive security assessments across enterprise environments. You will identify vulnerabilities, simulate real-world attack scenarios, and collaborate with DFIR, SOC, and security operations teams to improve detection and resilience.

The role combines hands-on testing with support during cyber incidents, threat investigations, and security improvement initiatives, requiring strong communication with technical and non-technical

Qualifications

• 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.

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.

Skills

Penetration testing

Web security testing

Network security testing

Cloud security testing

Active Directory security

Incident response collaboration

Communication with stakeholders

Portuguese (C1)

English (C1)

Job description

Thales Group is seeking a skilled Penetration Tester to drive offensive security assessments across enterprise environments. You will identify vulnerabilities, simulate real-world attack scenarios, and collaborate with DFIR, SOC, and security operations teams to improve detection and resilience.

The role combines hands-on testing with support during cyber incidents, threat investigations, and security improvement initiatives, requiring strong communication with technical and non-technical