Penetration Tester

Integrity360; Greater London; On-site; GBP 50,000 - 70,000; Full time

Job summary

A leading cybersecurity provider in Greater London is seeking a professional to conduct technical security assessments. This role involves assessing clients’ IT systems, performing penetration testing, and documenting technical issues. Candidates should have strong experience in information security, excellent communication skills, and relevant certifications. If you're driven by innovation and passion for security, this is an opportunity to elevate your cybersecurity career.

Qualifications

• Experience assessing IT security, applications, and infrastructure.
• Knowledge of security methodologies and documentation.
• Ability to mentor team members and represent the company at events.

Responsibilities

• Conduct technical security assessments on client systems.
• Perform application and infrastructure security reviews.
• Research cutting-edge security topics and improve existing services.

Skills

Solid experience in information security

Industry experience in Dev/Admin/Engineer

Penetration testing experience

Development experience in various programming languages

Strong Unix, Windows and networking security skills

Excellent communication skills

Manual penetration testing experience

In-depth networking knowledge

Ethical hacking experience

Report writing experience

Education

IT related degree or certificate

CHECK Team Leader or equivalent

Industry qualifications (OSCP, CREST, OSCE, OSWP)

Job description

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, Rome, 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.

Job Role / Responsibilities

This position is responsible for performing all forms of complex technical security assessments of clients' information technology systems (including the Internet, Intranet, Applications, Hosts, Firewalls, Mobile applications etc.) and related policies and procedures. Communication in both written and verbal forms, including training courses, workshops, consultations with clients and formal reports. These assessments are conducted on a by-project basis, ranging between one and three weeks per project, and will occasionally be done at the client site. This role is also required to conduct ongoing research in the IT security arena and regularly assisting in the sales process.

Primary Duties/Responsibilities include:

• Perform security reviews of architecture and application designs, as well as application source code reviews
• Perform mobile, complex application, infrastructure, as well as social engineering assessments and penetration testing
• Exploit vulnerabilities to gain access, and expand access to remote systems
• Document technical issues identified during security assessments
• Assist with building, hardening, and maintaining systems used for penetration testing
• Research cutting edge security topics and new attack vectors
• Assist with improvements for Integrity360's security services, including the continuous enhancement of existing methodology and reporting formats, as well as training collateral
• Communication of findings/innovations internally, to colleagues
• Represent Integrity36 at international events, forums or training events
• Demonstrate the ability to be an industry expert
• Mentor team members

Desired Skills

• Solid experience in information security
• Industry experience working in Dev/Admin/Engineer field
• Industry experience working in 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
• Strong 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
• Experience developing custom scripts or tools used for vulnerability scanning and identification
• In depth networking knowledge (MPLS, BGP, OSPF, IPv6, TOR)
• Understanding of development frameworks
• Broad understanding of hosting /cloud environment
• Broad understanding of SIEM & Defensive Technologies.
• Understanding of Security Auditing tools
• Ethical hacking experience
• Intrusion prevention experience
• Report writing experience
• Presentation skills
• Scripting/coding, sys admin or networking experience
• Understanding of programming methodologies
• Understanding of quality management and project management principles
• Knowledge of advance cloud architecture

Certifications/Qualifications

• CHECK Team Leader or equivalent
• IT related degree or certificate
• One of the industry leading qualifications (OSCP, CREST, OSCE, OSWP)