How to Become a Penetration Tester

The profession in five points

• Penetration testing is demanding, but learnable. Systems administration, software development and network operations are strong starting points. Motivated career changers have a realistic route as well.
• Practice beats attendance certificates. A documented lab, small tools, write-ups and clearly explained findings demonstrate more than a long list of passive courses.
• Indicative salary ranges from 54,100 € to 72,700 €+. Role, region, specialisation, project experience and responsibility all matter.
• The job is not just exploiting systems. Scoping, understanding a system, testing, verifying, assessing risk and reporting clearly form one workflow.
• Hardware pentesting is a valuable specialisation. Combining electronics, debug interfaces, firmware and radio lets you assess the product rather than only its web surface.

What does a penetration tester do?

Penetration testers, pentesters for short, conduct authorised, controlled attacks against applications, networks, cloud environments or products. They do not merely collect theoretical weaknesses. They determine whether a weakness is exploitable, under which conditions, and what an attacker could gain. The goal is a defensible view of the attack surface before a real attacker uses it.

A good pentest therefore does not end with a technical hit. A finding must be reproducible, explain the impact on the actual system, and recommend remediation that an engineering team can implement. Technical curiosity, methodical work and clear writing are parts of the same profession.

What does a penetration tester earn?

As guidance for Germany, the annual figures we maintain for 2026 are:

Gross annual salary, rounded indicative figures, not a salary promise. Specialisation, responsibility, industry, region, travel and negotiation all affect actual compensation.

High-demand combinations, such as deep web and cloud experience, Active Directory, exploit development, or hardware and firmware analysis, can increase market value. At senior level, employers also care whether you can lead complex assessments, defend findings with engineering and management, and review the work of less experienced colleagues.

Tasks and workplaces

The exact mix depends on the team and specialisation. Typical work includes:

• security testing of web and mobile applications, APIs, networks, Active Directory and cloud infrastructure
• analysis of devices, firmware, radio links and proprietary protocols
• threat modelling, attack-surface analysis and designing a meaningful test scope
• code review, configuration analysis and development of custom test tooling
• verification and prioritisation of vulnerabilities rather than forwarding raw scanner output
• technical reports, management summaries and results workshops
• retesting to confirm that remediation is effective

How do you become a penetration tester?

There is no single correct route. Many pentesters come from systems administration, network operations, software development, IT security or incident response. What matters is learning to explain systems, not merely operate them: where are the trust boundaries, what assumptions does the code make, and what becomes possible after initial access?

The technical foundation

• TCP/IP, DNS, HTTP, TLS, routing, authentication and common network services
• Linux and Windows, permissions, processes, logs and command-line work
• web technologies, APIs, databases and at least one programming language
• scripting with Python, Bash or PowerShell to make tests repeatable
• common attack classes, secure development principles and cryptography fundamentals
• precise technical writing: prerequisite, test, observation, impact and remediation

A realistic route to the first job

Do I need a degree?

A degree in computer science, cybersecurity, electrical engineering or a related subject can make the first step easier. It is not mandatory. Demonstrable ability, systematic reasoning and the quality of your work matter in practice. Systems administrators and developers often bring a particularly valuable understanding of real systems.

Career changers need credible evidence: a lab, traceable documentation, contributions to tools or projects, and perhaps a practical certification. A candidate who only lists tools is interchangeable. A candidate who can explain how a flaw arises, how it was reproduced and which remediation actually works is starting to look like a pentester.

Certifications, labs and practical experience

Certifications can provide structure and help with a first application. They do not replace practice. Choose one for the role you want and inspect current job advertisements rather than relying only on name recognition.

For legal practice, use intentionally vulnerable environments and clearly governed platforms such as PortSwigger Web Security Academy, Hack The Box, TryHackMe, OverTheWire, WebGoat or designated CTFs. In bug-bounty programmes, only the published scope is authorised.

Is penetration testing future-proof?

Attack surfaces continue to grow with cloud adoption, software supply chains and connected products. At the same time, scanners and AI automate parts of research. That does not remove the need for strong pentesters: value remains in understanding complex systems, forming hypotheses, chaining attacks, communicating uncertainty and verifying effective remediation.

With experience, career paths lead to senior and lead roles, security research, red teaming, product security, security architecture, incident response or technical leadership. Hardware and firmware competence adds roles in embedded security, automotive, industrial systems, medical devices, IoT and vulnerability research.