Medior Pentester

Randstad - Netherlands; Portugal; Presencial; EUR 60 000 - 80 000; Tempo integral

Resumo da oferta

Randstad is seeking a Medior Pentester (Global Offensive Security Specialist) to join its global CISO office in Portugal. The role focuses on hands-on penetration testing across IT applications, AI models, cloud networks, and complex Red Teaming exercises, with emphasis on collaborative remediation rather than pure reporting.

You will simulate real-world attacks using the MITRE ATT&CK framework, work with international security teams, and contribute to tooling and threat modeling as part of a

Qualificações

• 4+ years hands-on experience in IT security, network penetration testing and adversary simulations.
• Knowledge of MITRE ATT&CK, OWASP and offensive security best practices.
• Ability to read/analyze code and modify exploits; strong network manipulation skills.

Responsabilidades

• Conduct end-to-end penetration testing across IT applications, AI models, and cloud environments.
• Lead realistic red team exercises to assess organizational resilience.
• Collaborate with engineers to remediate vulnerabilities and improve security controls.
• Develop internal tooling and research, expanding the security team's capabilities.

Conhecimentos

Penetration testing

Adversary simulations

MITRE ATT&CK

OWASP

AWS/GCP security

English communication

Ferramentas

Python scripting

Network security tools

Descrição da oferta de emprego

Job Title

Global Offensive Security Specialist / Pentester. Role Summary: We are hiring a Medior Pentester (Global Offensive Security Specialist) to join Randstad’s global CISO office and secure our international IT infrastructure across business applications, AI, cloud networks, and complex Red Teaming exercises. This role focuses on hands-on penetration testing, collaborative remediation, and adversary simulation—not auditor compliance or purely report-writing tasks.

Location: Portugal

What You Will Achieve

• Execute Technical Assessments: Perform end-to-end penetration testing across global IT applications, AI models, networks, and AWS/GCP cloud environments.


• Simulate Real-World Attacks: Conduct advanced Red Teaming exercises using the MITRE ATT&CK framework to test organizational resilience.


• Partner with Engineering: Collaborate directly with application development and infrastructure teams to fix vulnerabilities, rather than simply handing off a report.


• Internal Tooling & Research: Conduct security research, build/modify exploit scripts, and expand the team’s internal toolkit.


• Key Metrics You’ll Own: Time-to-remediation support for identified vulnerabilities across global operational companies; delivery of actionable threat models and attack simulations; growth and mentorship of junior offensive security team members.

What You Need to Succeed

• Experience: At least 4 years of hands-on experience in IT security, network penetration testing, and adversary simulations.


• Core Technical Skills: Strong hacker mindset, ability to read/analyze code, exploit development/modification, and manipulation of network infrastructure.


• Methodologies: In-depth knowledge of OWASP, MITRE ATT&CK, and offensive security best practices.


• Soft Skills: Fluent communication in English and a collaborative approach to working with international security teams.


• Desirable Certifications: OSCP, OSWE, GIAC (GXPN / GPEN), CEH, or EC-Council LPT.


• Experience in Purple Teaming or AWS/GCP security is a plus.

About Randstad

Randstad is the world’s largest talent company and a partner of choice. We support people and organizations in realizing their true potential by combining 60 years of HR expertise with cutting‑edge digital technology, data, and human touch.

The world around us: We live in extraordinary times. Technology, society, the job market – they’re all rapidly advancing, and opening up previously unimagined opportunities. With innovation driving the world of work even faster, many of us are left wondering: how can I find a job that works for me?

People at the heart of everything we do: Working at Randstad is unlike working at any organization. Because at Randstad we put people at the heart of everything we do; this goes for our clients, our candidates, our employees and society. By combining our passion for people with the power of today’s technologies, we support people and organizations in realizing their true potential. We call this Human Forward.

What do you get in return? In return for your talent and effort we pay a good, competitive salary and offer attractive benefits. Job security and a great work‑life balance mean we take care of each other. Imagine having an instant network where everyone wants you to succeed. And we have the numbers to back that up: we’re 38,331 employees strong, with over 4,800 offices in 38 countries. And 47% of our management is female. Randstad’s performance standards are high, but as a team, we’ll make sure you reach and even exceed them through a wide range of learning and development opportunities. Joining our team means getting to work with great people. Each of them is crucial to maintaining our open‑minded, entrepreneurial, and vibrant company culture. Sure you’ll work hard, but this hard work is also rewarded, and success is celebrated. It’s the culture you’ll find in any of our global Randstad offices.

Human forward starts with you. Randstad’s purpose is: supporting people and organizations in realizing their true potential. And this starts with making your work meaningful every day. It’s people‑work at its best. Making work meaningful.

About Randstad: The Randstad Group is a global leader in the HR services industry and specialized in solutions in the field of flexible work and human resources services. Our services range from regular temporary staffing and permanent placements to in‑house services, professionals, and HR solutions (including recruitment process outsourcing, managed services programs, and outplacement). In 2017, Randstad generated revenue of € 23.3billion. Randstad was founded in 1960 and is headquartered in Diemen, the Netherlands. Randstad N.V. is listed on the NYSE Euronext Amsterdam, where options for stocks in Randstad are also traded. For more information, see www.randstad.com.