# Penetration Tester

> Uni Systems · Braine-l'Alleud, Belgium · Full-time · Posted 2026-06-08

**Workplace:** on_site

**Department:** Professional Services Practice

## Description

At UniSystems, we are working towards turning digital visions into reality. We are continuously growing and we are looking for a **Penetration Tester** to join our UniQue team in Brussels!

**What will you be doing in this role:**

-   Lead and/or participate in Red/Blue Team exercises.
-   Perform web, infrastructure, and application-level penetration testing.
-   Conduct security design reviews to ensure compliance with applicable security policies and directives.
-   Provide security consultancy and advice to projects, programmes, and other organizational entities.
-   Build and maintain effective communication with key stakeholders, including Configuration Control Boards, Security Accreditation Boards, Security Accreditation Authorities, and organizational units supporting accreditation processes.
-   Deliver briefings to both executive and technical audiences on security assessments, reports, and testing outcomes.
-   In coordination with the Head of the Penetration Testing Team, ensure proactive collaboration and coordination with internal and external stakeholders.

## Requirements

**What do you need to succeed in this position?**

-   Bachelor's degree in a relevant field with at least 3 years of experience in:
-   Web application penetration testing.
-   IT infrastructure penetration testing.
-   Network security architecture design.
-   Assessing security vulnerabilities within operating systems, software, protocols, and networks.
-   Researching and evaluating security products and technologies.
-   System and network administration of UNIX and Windows environments.
-   Use of penetration testing tools, techniques, and recognized testing methodologies.
-   Scripting skills in at least one of the following: Perl, Python, Ruby, or shell scripting (Bash, KSH, CSH).
-   Technical knowledge of system and network security, authentication and security protocols, cryptography, application security, malware infection techniques, and protection technologies.
-   Ability to evaluate risks and formulate mitigation plans.
-   Proven ability to write clear and structured technical reports, including executive summaries, technical findings, and remediation plans for different audiences.
-   An active NATO Security Clearance is required.
-   Very good command of spoken and written English (B2).

At Uni Systems, we are providing equal employment opportunities and banning any form of discrimination on grounds of gender, religion, race, color, nationality, disability, social class, political beliefs, age, marital status, sexual orientation or any other characteristics. Take a look at our [Diversity, Equality & Inclusion Policy](https://www.unisystems.com/sites/default/files/2023-05/Diversity%2C%20Equality%20and%20Inclusion%20Policy.pdf) for more information.

## Apply

[Apply at Uni Systems](https://apply.workable.com/uni-systems/j/6B65721C24/apply)

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