Penetration Tester

Citation Ltd; Hemel Hempstead; On-site; GBP 65,000 - 95,000; Full time

Job summary

Citation Cyber in the United Kingdom is seeking a Security Consultant (Penetration Testing) to work in a hybrid model. You will perform infrastructure and web application pentests, assess cloud security, and deliver clear reports to clients across sectors.

The role requires strong testing experience, excellent communication, and a drive for continuous learning. Hybrid UK flexibility and professional development opportunities are offered.

Qualifications

• Commercial penetration testing experience within a consultancy or equivalent environment.
• Strong technical reporting skills.
• Experience conducting infrastructure and web application penetration tests.
• Good understanding of Windows, Linux and Active Directory environments.
• Familiarity with Azure and/or AWS security testing.
• Experience using industry-standard penetration testing tools and methodologies.
• Excellent written and verbal communication skills.
• A passion for continuous learning and technical development.

Responsibilities

• Deliver a wide range of technical security assessments across client environments.
• Identify vulnerabilities and strengthen client cyber resilience.
• Produce clear, high-quality technical reports.
• Present findings and remediation advice to clients.
• Support vulnerability validation and re-testing.
• Contribute to internal tooling, research and knowledge sharing.

Skills

Penetration testing

Technical reporting

Infrastructure testing

Web application testing

Cloud security testing

Windows

Linux

Active Directory

Azure

AWS

Communication

Continuous learning

Education

CHECK CTM status (desirable)

SC Security Clearance (or eligible)

CREST CRT / CSTM

OSCP or equivalent

Tools

Penetration testing tools

Vulnerability assessment tools

Reporting tools

Job description

Security Consultant (Penetration Testing)Location: Hybrid (UK)Salary: Competitive + BenefitsSecurity Clearance: Current SC preferred

About Citation Cyber

Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations across both the public and private sectors. As an NCSC CHECK provider and CREST member company, we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step, we'd love to hear from you.

The Role

You'll work as part of our penetration testing team delivering a wide range of technical security assessments across client environments, helping organisations identify vulnerabilities and strengthen their cyber resilience.

Your work will include:

• Infrastructure or Web application penetration testing
• Cloud security assessments
• Producing clear, high-quality technical reports
• Presenting findings and remediation advice to clients
• Supporting vulnerability validation and re-testing
• Contributing to internal tooling, research and knowledge sharing

What we're looking for

• EssentialCommercial penetration testing experience within a consultancy or equivalent environment
• Strong technical reporting skills
• Experience conducting infrastructure and web application penetration tests
• Good understanding of Windows, Linux and Active Directory environments
• Familiarity with Azure and/or AWS security testing
• Experience using industry-standard penetration testing tools and methodologies
• Excellent written and verbal communication skills
• A passion for continuous learning and technical development

Desirable

• Current CHECK Team Member (CTM) status
• Current SC Security Clearance (or eligibility to obtain it)
• CREST CRT / Cyber Scheme CSTM or equivalent certification
• OSCP or equivalent practical penetration testing certification
• Experience with API, mobile or wireless security testing
• Scripting or automation experience using Python, PowerShell or Bash

Why Join Citation Cyber?

• We're building a consultancy where technical excellence, innovation and professional development go hand in hand.
• Working for an NCSC CHECK provider and CREST member
• A varied mix of commercial, defence and public sector projects
• Funded training and industry certifications
• Clear progression towards CHECK Team Member, CHECK Team Leader and senior technical roles
• Hybrid and flexible working
• A collaborative technical culture where knowledge sharing is encouraged
• Opportunities to contribute to research, tooling and new service development
• Competitive salary and benefits

About You

You're passionate about offensive security and enjoy solving complex technical challenges. You produce high-quality work, communicate clearly with clients and are always looking to improve your skills. Whether you're already delivering CHECK assessments or you're looking to achieve CHECK status in the near future, you'll be joining a team that will support your professional development and provide exposure to challenging and rewarding engagements.