Senior Penetration Tester

Computacenter PLC; High Offley; On-site; GBP 50,000 - 70,000; Full time

Job summary

A leading IT infrastructure services provider in High Offley seeks a skilled Penetration Tester. In this role, you will execute vulnerability assessments and penetration tests across various systems and networks. You will work closely with security teams to identify and remediate vulnerabilities, using your expertise to bolster the organization's security posture. The ideal candidate should have a degree in Cybersecurity or a related field, along with certifications like OSCP or PNPT and substantial experience in penetration testing methodologies.

Benefits

Friendly working environment

Team-oriented company culture

Qualifications

• 3+ years of full-time experience as a penetration tester.
• OSCP, PNPT or equivalent certification.
• Experience with infrastructure, Cloud security (Entra ID/Azure), IoT, social engineering.

Responsibilities

• Conduct penetration tests on networks, applications, and cloud environments.
• Identify vulnerabilities and provide actionable recommendations.
• Work with teams to communicate risks and improve security measures.
• Stay updated on security threats and contribute to security training.

Skills

Penetration testing methodologies

Vulnerability analysis

Cloud security

Incident response

Education

Bachelor's degree in Cybersecurity, Information Technology, or related field

Tools

Penetration testing tools

Threat modelling tools

Job description

Computacenter is growing our penetration testing capability and we are looking for an experienced penetration tester to support the delivery of vulnerability assessment and penetration testing services to Computacenter and our customers. As a highly skilled and motivated Penetration Tester, you will join our dynamic Cybersecurity team. In this role, you will be responsible for identifying vulnerabilities in systems, applications, and networks through a variety of penetration testing methodologies. Your expertise will play a critical role in strengthening our security posture and safeguarding our valuable assets from cyber threats.

• Conduct comprehensive penetration tests: Execute internal and external network penetration tests, web application penetration tests, mobile application penetration tests, API penetration tests, cloud security assessments, and social engineering simulations.
• Vulnerability identification and analysis: Research, identify, and exploit security vulnerabilities in a variety of systems and applications.
• Red/Purple/Blue Teaming: participate in exercises with the goal of increasing cyber resilience for both offensive and defensive.
• Reporting and documentation: Prepare detailed and professional penetration test reports, including executive summaries, technical findings, risk ratings, and actionable recommendations for remediation.
• Collaboration and communication: Work closely with development, operations, and security teams to communicate findings, explain risks, and provide guidance on remediation strategies.
• Tooling and methodology enhancement: Continuously research and evaluate new penetration testing tools, techniques, and methodologies to improve testing efficiency and effectiveness.
• Security awareness: Contribute to the development and delivery of security awareness training for internal staff.
• Stay current: Keep abreast of the latest security threats, vulnerabilities, exploits, and industry best practices.
• Threat modelling: Participate in threat modelling exercises to identify potential attack vectors and design flaws.
• Ad-hoc security testing: Perform ad-hoc security assessments and provide expert advice on security-related matters as needed.
• OSCP, PNPT or equivalent certification
• At least three years' experience working full-time as a penetration tester on the following areas as a minimum:
  • Infrastructure
  • Active Directory networks
  • Cloud security (Entra ID/Azure)
  • IoT
  • Physical security / social engineering
• Ability to develop custom tools, or adapt existing tooling for the task at hand
• Demonstrable experience contributing to open-source tools
• Bachelor's degree in Cybersecurity, Information Technology, or a related field.

Computacenter is a leading independent provider of IT infrastructure services, with about 20,000 employees worldwide. We work at the heart of digitisation, advising organisations on IT strategy, implementing the most appropriate technology and managing our customers' infrastructures.

We offer a friendly, open working environment without too much fuss about hierarchy. We are looking for professionals with diverse competencies, personalities and strengths who want to live our shared value of teamwork and performance. Interested in joining a company with a strong sense of community? We're growing. We're hiring. We encourage. We empower. We support.