Deliver penetration testing engagements across:
Web applications
Network and infrastructure
Cloud environments
APIs and supporting services
Identify vulnerabilities, validate exploitability, and clearly articulate risk.
Produce concise, actionable reports suitable for both technical and non‑technical stakeholders.
Support clients with vulnerability remediation and technical explanations.
Contribute to the evolution of testing methodologies and internal tooling.
Collaborate closely with other testers and support the development of junior team members.

2+ years’ experience in a hands‑on penetration testing role.
Strong experience with web application and network/infrastructure testing.
Solid understanding of common vulnerability classes (e.g. OWASP Top 10).
Good working knowledge of Linux, Windows, and Active Directory environments.
Experience testing or reviewing cloud environments (AWS, Azure, GCP).
Proficiency with common tooling such as:
Burp Suite
Nmap
Nessus (or equivalent)
Kali Linux
Scripting experience in Python, Bash, or similar, for automation or custom tooling.
Ability to clearly communicate technical findings and risk.

A discretionary annual performance bonus that rewards your impact and contribution to our success.
Flexible working arrangements and summer hours, because life isn’t 9 to 5, and balance matters.
A highly competitive pension scheme with generous employer contributions, private healthcare, and life assurance for peace of mind.
Employee Assistance Programme, mental health support, cycle-to-work scheme, and regular social events to keep our culture vibrant.
35 days holiday, enhanced maternity pay, and family-first policies so you can focus on what matters most.
From courses to certifications, we’ll invest in your development so you can keep growing and shaping what’s next.
Opportunities to volunteer, give back, and be part of initiatives that make Instil a truly inclusive and connected workplace.

Senior Penetration Tester

Key skills