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Inetum

Global IT services for digital transformation

Offensive Security Engineer / Penetration Tester

Offensive Security & TestingConfirmed live in the last 24 hours
Full-timeSaint-Ouen-sur-Seine, FranceNo salary listed

About the Job

Requirements

  • Mastery of offensive techniques, including reconnaissance, exploitation, post-exploitation, and pivoting.
  • Strong knowledge of Linux and Windows systems, network protocols, and application security, including OWASP.
  • Experience with common security tools such as Burp Suite, Metasploit, Kali, Cobalt Strike, Nmap, and BloodHound.
  • Demonstrated experience in Red Team work and APT simulation using MITRE ATT&CK tactics, techniques, and procedures.
  • Ability to produce high-quality technical and operational reports.
  • An engineering education in computer science at Bac+5 level or equivalent.
  • At least 4 years of professional experience as an Offensive Security Consultant, Penetration Tester, or Ethical Hacker.
  • Familiarity with application security auditing techniques, including penetration testing, automated scans, and source-code analysis.
  • Fluent English.

Responsibilities

  • Conduct application penetration tests across web, mobile, and thick-client applications, as well as network, endpoint, infrastructure, and cloud testing in real or simulated environments.
  • Participate in Red Team and Purple Team campaigns, including advanced persistent threat scenarios, targeted attack simulations, logical and physical intrusions, social engineering, and antivirus or extended detection and response evasion.
  • Develop and execute complex attack scenarios involving vulnerability exploitation, privilege escalation, lateral movement, exfiltration, and phishing campaigns.
  • Contribute to defining attack strategies and conducting technical research on emerging threats.
  • Write clear, structured reports for technical and non-technical stakeholders, identifying vulnerabilities and associated remediation steps.
  • Present results and recommendations to internal and external clients in French and English, taking operational constraints into account.
  • Continuously improve internal tools and testing methodologies, and develop tools and scripts to automate and improve current penetration-testing processes.
  • Mentor junior colleagues and contribute to collective skills development.

Desired Qualifications

  • OSCP, OSCE, CRTP, CRTO, OSEP, or equivalent certifications.
  • Participation in capture-the-flag competitions or cybersecurity challenges.

About the Company

Inetum

Global IT services for digital transformation

Inetum provides IT services for digital transformation in 26 countries, serving enterprises, SMEs, and public sector clients. It offers cybersecurity, cloud computing, predictive maintenance, and augmented reality, delivered through consulting, managed services, and proprietary software. It differentiates itself through a broad service portfolio, strategic partnerships with Microsoft and Sage, and a focus on tailoring solutions to fit each client’s needs. Its goal is to help clients adapt to a changing digital landscape, improving business agility and creating economic, managerial, and social opportunities.

Company size
1,001-5,000
Company stage
IPO
Headquarters
Saint-Ouen, France
Founded
1995

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