Penetration Tester

C
CognisysCybersecurity
UK (Remote) Must be based in the UK.Full-Time
Salary not disclosed
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Job Details

Required Skills
API testingManual testing

Requirements

  • Hands-on experience conducting penetration testing and security assessments.
  • Experience using vulnerability scanning tools alongside manual testing and exploitation techniques.
  • Strong understanding of offensive security methodologies, tools and techniques.
  • Experience in one or more of network penetration testing, web application testing, API testing, mobile application testing or cloud security testing.
  • Ability to assess technical controls and explain findings clearly to clients.
  • Strong analytical and problem-solving skills.
  • Excellent written and verbal communication skills.
  • Ability to communicate technical vulnerabilities and risks in a clear, non-technical format.
  • Strong client engagement skills and a professional approach to customer service.
  • Ability to manage workload and deliver work to agreed deadlines.
  • A proactive approach to learning and keeping up to date with offensive security developments.
  • Industry-recognised certifications are preferred; examples include OSCP, CPSA, CRT and CREST-related certifications.

Responsibilities

  • Conduct penetration testing across networks, web applications, APIs, mobile applications and cloud environments.
  • Simulate real-world attack scenarios and assess client resilience against cyber threats.
  • Use automated vulnerability scanning tools alongside manual testing and exploitation techniques.
  • Identify and analyse vulnerabilities and assess the effectiveness of technical security controls.
  • Work directly with clients throughout engagements and present findings and recommendations.
  • Produce technical reports documenting vulnerabilities, evidence, risk and remediation recommendations.
  • Help clients understand and prioritise remediation activities.
  • Share knowledge with colleagues and contribute to the development of penetration testing methodologies.
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