Offensive Security Specialist

As a Cybersecurity Offensive Specialist at Capgemini, you'll play a critical role in strengthening our clients' security posture by proactively uncovering and exploiting weaknesses in their systems. You'll join a collaborative team of offensive and defensive experts-sharing insights with incident responders, purple teams, and architects-to drive continuous improvement across people, processes, and technology., * Proactive Security Assessments

• Identify, analyze and prioritize vulnerabilities, misconfigurations, and design gaps in networks, applications, and infrastructure.

• Drive "security by design" improvements through clear, actionable recommendations.

• Collaboration & Knowledge Sharing

• Work closely with incident response, SOC, and purple-team colleagues to translate offensive findings into enhanced detection and remediation strategies.

• Present technical findings and remediation roadmaps to both technical teams and executive stakeholders.

Key Activities

1. Vulnerability Assessment Specialist

• Configure and run automated scans (e.g. Nessus, Tenable.io) against target environments.
• Manually validate scan results, triage false positives, and assess business impact.
• Produce detailed assessment reports and present findings to clients.
• Contribute to purple-team exercises to validate detection and prevention controls.

2. Penetration Testing Specialist

• Plan and execute scoped pentests-both manual and tool-driven (e.g. Burp Suite, Metasploit, Cobalt Strike).
• Exploit identified weaknesses to validate risk, then propose realistic remediation steps.
• Evaluate the maturity of existing security controls and vulnerability management processes.
• Deliver comprehensive engagement reports and debrief sessions with client teams.

3. Red Teaming Specialist

• Design and run multi-phased red-team exercises emulating advanced persistent threat tactics, techniques, and procedures.
• Employ stealthy evasion and privilege-escalation methods to demonstrate worst-case impact.
• Evaluate and challenge blue-team detection, response playbooks, and incident handling capabilities.
• Lead post-exercise "lessons learned" workshops and help harden defenses.

• Core Expertise

• 3+ years hands-on experience in one or more offensive disciplines.

• Proven ability to translate technical findings into business-oriented risk narratives.

• Excellent written and verbal communication skills.

• Vulnerability Assessment

• Mastery of vulnerability scanning platforms (e.g. Nessus, Rapid7, Qualys).

• Penetration Testing

• Deep familiarity with web, network, and API pentesting toolchains (Burp Suite, Cobalt Strike, Metasploit).

• Red Teaming

• Advanced skills in adversary emulation, covert C2, stealthy payload delivery, and lateral movement.

Additional Skills :

• Industry certifications such as OSCP, OSCE, CRTO, or GXPN.
• Scripting proficiency (Python, PowerShell, Bash) for automation and custom tooling.
• Experience testing cloud and container environments (AWS, Azure, GCP, Kubernetes).
• Prior work in regulated sectors (finance, healthcare, government)

Capgemini ist einer der weltweit führenden Anbieter von Management- und IT-Beratung, Technologie-Services und Digitaler Transformation. Als ein Wegbereiter für Innovation unterstützt das Unternehmen seine Kunden bei deren komplexen Herausforderungen rund um Cloud, Digital und Plattformen.