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

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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

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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.

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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.

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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.