Penetration Tester

About Us

Integrity360 is the largest independent cyber security provider in Europe, with a growing international presence spanning the UK, Ireland, mainland Europe, Africa and the Caribbean. With over 700 employees, across 12 locations, and six Security Operations Centres (SOCs)—including locations in Dublin, Sofia, Stockholm, Madrid, Naples and Cape Town—we support more than 2,500 clients across a wide range of industries.

Over 80% of our team are technical experts, focused on helping clients proactively identify, protect, detect and respond to threats in an ever-evolving cyber landscape. Our security-first approach positions cyber resilience as a business enabler, empowering organisations to operate with confidence.

At Integrity360, people come first. We invest heavily in learning, development and progression, fostering a dynamic culture where innovation, collaboration and continuous growth are at the heart of what we do. If you're ready to take your cyber security career to the next level, we’d love to hear from you.

Role Overview

As a Penetration Tester, you will perform hands-on technical security testing across a range of environments and technologies, working on complex and high-value projects. You will be expected to perform advanced manual testing (not just automated scans), exploit vulnerabilities, and deliver clear, actionable reports to clients.

This role is ideal for someone who already has solid penetration testing experience and wants to take their technical skills to the next level, while also contributing to research and innovation within the team.

What You Already Bring

2+ year of practical penetration testing experience (in labs, personal projects, or professionally)

Strong understanding of core security concepts (e.g., OWASP Top 10, CVSS, MITRE ATT&CK)

Solid grasp of networking fundamentals, ports/protocols, basic Windows/Linux internals

Experience with common tools: Nmap, Burp Suite, Gobuster, Metasploit, BloodHound, etc.

Manual testing exposure — not just automated scans

Basic scripting or coding (e.g., Python, Bash, PowerShell)

Good communication and documentation skills

Nice to Have (But Not Required)

Practical experience in one or more of:

Active Directory attacks

Cloud (AWS/Azure) testing basics

Social engineering

Source code review

Certifications such as OSCP or similar

Contributions to CTFs, Hack The Box, or bug bounty programs

What We Offer

A clear career path from Associate → Mid-Level → Senior → Red Team

Support for certifications, lab access, and personal development

Internal mentoring and hands-on training

Exposure to real client projects and cutting-edge engagements

A high-performing, international team where you can grow fast

Key Responsibilities

Conduct penetration tests and technical security assessments on:

Web applications and APIs

Mobile applications

Network infrastructure (internal and external)

Cloud and hybrid environments

Social engineering scenarios (as needed)

Consultancy

Other offensive security services

Review system architecture and application designs for security weaknesses.

Exploit and escalate vulnerabilities to demonstrate real-world risk.

Document technical findings and produce high-quality reports with remediation guidance.

Stay current with the latest attack techniques, vulnerabilities, and tools.

Participate in internal knowledge sharing, tool development, and security research.

Support sales activities with technical insights when needed (e.g., scoping calls, workshops).

Represent Integrity360 in client engagements, technical discussions, or industry forums.

Required Skills / Experience

Hands-on experience as a penetration tester, with a proven track record of delivering quality security assessments.

Industry experience working in Dev/Admin/Engineer field

Industry experience working in the Information security field as a penetration tester

Development and/or source code review experience in C/C++, C#, VB.NET, ASP, PHP, Java, Python or Ruby

Unix, Windows and networking security skills 

Familiarity with general application and network security concepts 

Excellent communication skills 

Manual penetration testing experience above and beyond running automated tools 

Networking knowledge (ports, protocols, firewalls, routing, VPN)

Understanding of Security Auditing tools

Ethical hacking experience

Report writing experience

Presentation skills

Scripting/coding, sys admin or networking experience

Understanding of programming methodologies in one or more programming or scripting languages: Java, Python, C/C++, C#, .NET, ASP, PHP, etc.

Personal Specification

Urgent desire to learn with a passion for technology

Motivated by being at the forefront of technology, and pushing technology boundaries

Motivated by the thrill of being able to “break” systems

Willingness to work late when required

Willingness to travel when required, possibly abroad

Analytical and critical thinker

Good written English skills

Problem-solving skills

Efficient

Analytical

Persistence

Attention to detail

Certifications/Qualifications

One of the industry-leading qualifications (OSCP, CyberScheme, CREST, OSCE, OSWP)

A degree in Computer Science, Cybersecurity, or related field is preferred, but practical experience and demonstrable skill are highly valued.

#LI-PM2