Internal Penetration Tester

Job description

Internal Penetration Tester
Salary: £75,000 - £110,000 per annum
Location: London - 2/3 days per week
We are partnering with a globally recognised professional services organisation that operates across multiple international markets and supports thousands of employees worldwide. With technology and cyber security continuing to be a strategic priority, the business is investing heavily in strengthening its cyber resilience, risk management capabilities and enterprise security programmes.
This is an excellent opportunity for an experienced Penetration Tester, Offensive Security Consultant or Application Security professional to join a growing global security team responsible for assessing and improving the security of enterprise applications, platforms and emerging technologies.
Internal Penetration Tester - Responsibilities
Perform manual penetration testing and security assessments of web applications, APIs and enterprise platforms.
Identify, validate and exploit security vulnerabilities using recognised penetration testing methodologies and industry best practices.
Conduct security testing aligned to OWASP guidance and application security frameworks.
Produce detailed technical reports outlining findings, risk ratings, remediation recommendations and business impact.
Work closely with application owners, technology teams and security stakeholders to communicate findings and support remediation efforts.
Contribute to security research, testing methodologies and the assessment of emerging technologies, including AI-enabled applications and services.
Internal Penetration Tester - Requirements
Minimum 3-5 years of hands-on penetration testing experience within enterprise, consultancy or professional services environments.
Strong practical experience conducting web application penetration testing, including manual assessment techniques and vulnerability validation.
Excellent understanding of OWASP Top 10 vulnerabilities, web application security principles and offensive security methodologies.
Experience performing independent security assessments and delivering findings from initial scoping through to final reporting.
Hands-on experience with tools such as Burp Suite, Kali Linux, Metasploit, Nessus, Wireshark or e...

Extra information

Status

Open

Education Level

Secondary School

Location

London

Type of Contract

Full-time jobs

Published at

02-11-2026

Full UK/EU driving license preferred

No

Car Preferred

No

Must be eligible to work in the EU

No

Cover Letter Required

No

Languages

English