IT & Software

Security Testing Consultant

Oscar

London · Greater London · United Kingdom

Overview

In this role you own end-to-end penetration testing engagements across web apps, infrastructure, cloud, and APIs. You work closely with experienced testers to execute tests, scope, report, and debrief clients, helping identify vulnerabilities and remediation steps. You will expand into advanced offensive security areas such as AI security assessments, assumed breach, and red teaming. This position offers funded certification support, a collaborative environment, and opportunities to shape testing methodologies and tooling. You will contribute to client-focused reporting and knowledge sharing while growing your technical range and impact.

Pay / Benefits
  • hybrid working
  • funded certifications
  • conference attendance
  • professional development plan
  • opportunity to expand into advanced offensive security disciplines
  • collaborative team environment
Responsibilities
  • Deliver penetration testing engagements across web applications, infrastructure, cloud environments and APIs
  • Manage engagements from scoping through testing, reporting and client debriefs
  • Identify, investigate and validate vulnerabilities with actionable remediation guidance
  • Produce high-quality reports for technical and non-technical audiences
  • Communicate findings and recommendations directly to clients
  • Contribute to development of testing methodologies, processes and internal tooling
  • Collaborate with experienced testers to maintain quality of security assessments
  • Build expertise in emerging offensive security areas including AI security assessments, assumed breach exercises and red-team operations
Key requirements
  • Commercial experience delivering penetration testing engagements
  • Hands-on testing experience for web applications and infrastructure with exposure to cloud and APIs
  • Strong understanding of common vulnerabilities, exploitation techniques and security testing methodologies
  • Experience producing technical reports and communicating findings to clients
  • Ability to independently manage testing activities and own engagements
  • Proactive learning mindset and problem-solving approach
  • Strong written and verbal communication skills
  • proactive
  • problem-solving
  • strong communication
  • penetration testing across web, infrastructure, cloud, APIs
  • vulnerability assessment and exploitation techniques
  • security testing methodologies

Reference: WJ-747_31224904

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