Penetration Tester

TwelveSec· Operations
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📍 Chalandri, Attica, GreeceFull time💰 EUR 2K–3K

About this role

Join the TwelveSec team!

We’re a Cybersecurity firm, specializing in penetration testing, assurance and security management consulting and we’re looking for a senior level Penetration Tester to join us. We offer a top-market salary, a supportive work environment, flexible hours, and remote work options with only four required in-office days per month.

We’re looking for someone with a strong technical background and good knowledge of security management and governance principles. You should have at least 4 years of working experience as a Penetration Tester and ideally a relevant academic qualification (e.g. a Master’s degree on Information Security or related field). If you want to intrigue us, let us know if you’ve been involved in OSS projects and/or security community initiatives.

You must be an EU citizen or be eligible to work within the EU.

We’ll expect you to demonstrate a good understanding and previous experience of at least 4 years in the following engagement types (professional references from past employers are welcome):

  • Web App Penetration Testing
  • Network and System (Infrastructure) Penetration Testing
  • Android and iOS Penetration Testing

Nice-to-have (Not obligatory):

Ideally, you should also be competent in some of the following:

  • Firmware Analysis and Reverse Engineering
  • Knowledge of Hardware Protocols (UART/I2C/SPI/JTAG/SWD)

Certifications (Not obligatory):

The following professional certifications will put your CV to the top of our “to call” list (with order of importance):

  • OSCP
  • OSWE
  • OSEP
  • TCM Practical IoT Penetration Tester

Here are some of the benefits of joining the TwelveSec team:

  • Gross monthly salary (14 payments/year): €2,200–€3,200 depending on qualifications and experience.
  • Work in a friendly environment, with good team chemistry
  • Work from home and have flexible hours
  • Get involved in the growth of a new company with more promotion opportunities
  • Gain experience with new types of projects and international trips
  • Improve your CV by getting security certifications with our support

Frequently Asked Questions

What is the salary for the Penetration Tester role at TwelveSec?
The listed salary for this Penetration Tester position at TwelveSec is EUR 2K–3K. This is an Full time role.
Where is the Penetration Tester position at TwelveSec located?
This Penetration Tester role at TwelveSec is based in Chalandri, Attica, Greece. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Penetration Tester role at TwelveSec full-time or part-time?
This is listed as a Full time position. It is posted as a Penetration Tester role in the Operations department at TwelveSec.
Which team or department does the Penetration Tester at TwelveSec belong to?
This Penetration Tester position is part of the Operations department at TwelveSec. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Penetration Tester position at TwelveSec?
Click the "Apply Now" button on this page. You will be redirected to TwelveSec's official application portal hosted on workable where you can submit your application directly.
When was the Penetration Tester job at TwelveSec posted?
This Penetration Tester position at TwelveSec was posted on Jul 17, 2026. Apply as soon as possible — early applications are often reviewed first.
Penetration Tester
TwelveSec · 💰 EUR 2K–3K
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You'll be redirected to TwelveSec's official application page on workable.