Infrastructure Penetration Tester - RED team
Diverto
Posted: February 9, 2026
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Quick Summary
We are seeking a skilled Infrastructure Penetration Tester to join our team in Zagreb, Croatia. The ideal candidate will have experience in penetration testing and a strong understanding of network security. The successful candidate will be responsible for identifying vulnerabilities and providing recommendations to improve the security of our customers' remote operations.
Required Skills
Job Description
Wherever our customers are in the world, we help them digitalise and optimise their remote business processes using advanced hybrid network solutions and digital technologies.
At Marlink, we empower our customers worldwide by helping them digitalize and optimize their remote operations through advanced hybrid network solutions and cutting-edge digital technologies. Our teams operate globally, harnessing innovation, expertise, and applied technology to connect systems and people, driving success in today’s digital-first world. With 1,500 employees in over 30 countries, and customers in the maritime, energy, and government sectors, we push boundaries to deliver excellence.
As Infrastructure Penetration Tester you will be conducting technical penetration tests for our clients, uncovering weaknesses, ethically exploiting them, and guiding customers toward meaningful improvements in their infrastructure security.
Responsibilities:
• Conducting penetration tests of the infrastructure at a technical level.
• Proposing security improvements at a strategic and technical level.
• Vulnerability classification and severity determination (CVSS)
• Documenting and presenting findings and writing reports on the conducted penetration tests.
• User education
• Collaboration with the user and cooperation with other teams within the company
• Minimum two years of experience in the same or similar jobs.
• Knowledge of penetration testing methodology.
• Experience working with tools for vulnerability identification and interpreting results
• Vulnerability chaining and vulnerability exploitation
• Knowledge of Windows and/or Linux operating systems from a security perspective.
• Documentation, communication and presentation skills.
• Proactivity and independence in performing tasks.
• English language - advanced knowledge in speaking and writing.
• Driver's license category B
Nice to have:
• Experience in vulnerability exploitation and lateral spread
• Experience in gaining initial access and expansion using stealth techniques
• Experience working on strengthening services, protocols, operating systems or network devices.
• Possession of international industrial certificates in the field of information security or penetration testing (Offensive Security, SANS, EC-COUNCIL, Pentester Academy, ...)
What we offer:
• Dynamic and fast-paced work environment, with a high level of autonomy.
• Impactful role in a growing cyber business within a global group.
• Opportunity to achieve your biggest potential and development in your area of responsibility.
• Professional development (training, certifications) and a culture of ownership and trust.
• Hybrid work – office work + work from home.
• Flexible working hours.
• Additional and supplementary health insurance packages.
• Multisport membership.
• Pet-friendly office.
• Social events and team bonding gatherings.
• Compensation package consisted of base + bonus part, competitive in the market.