Senior Penetration Tester (CHECK) - Cloud & Web Security

Instil; City of Edinburgh; On-site; GBP 75,000 - 105,000; Full time

Benefits offered by this job

Annual bonus

Pension

Private healthcare

Life assurance

Flexible hours

35 days holiday

Job summary

Instil is seeking a Senior Penetration Tester with CHECK to join our growing team. You will deliver high-quality penetration testing engagements across infrastructure, cloud, web, and mobile applications for a diverse range of clients, including software, fintech, manufacturing, engineering, legal, and public sector organisations.

This hands-on role requires you to identify and remediate security weaknesses, mentor junior testers, and develop our methodologies while working in a supportive

Qualifications

• Security clearance in place or eligible for UK clearance.
• Minimum 2 years in penetration testing across multiple domains.
• Experience with web and network assessment methodologies.
• Strong OS knowledge and scripting abilities.
• Hands-on in cloud security assessments and tool proficiency.

Responsibilities

• Perform penetration testing across infrastructure, cloud, web and mobile environments.
• Identify and remediate security weaknesses and provide actionable findings.
• Mentor junior testers and contribute to testing methodologies.
• Collaborate with clients to deliver high-quality engagements.

Skills

CHECK CTM status

Current UK Security Clearance

2+ years penetration testing

Web app and network testing

OS knowledge (Linux/Windows/AD)

Cloud security reviews

BurpSuite/Nessus/Nmap/Kali

Scripting (Python, Shell)

Tools

BurpSuite Pro

Nmap

Nessus

Kali Linux

Job description

Instil is seeking a Senior Penetration Tester with CHECK to join our growing team. You will deliver high-quality penetration testing engagements across infrastructure, cloud, web, and mobile applications for a diverse range of clients, including software, fintech, manufacturing, engineering, legal, and public sector organisations.

This hands-on role requires you to identify and remediate security weaknesses, mentor junior testers, and develop our methodologies while working in a supportive