11 of 11 Infrastructure Tester Jobs in the UK

Job Title: Senior Penetration Tester (Infrastructure Focus) Location: London (Hybrid/Flexible) Salary: Up to £80,000 + Bonus + Benefits Employment Type: Permanent Overview We are seeking an experienced Senior Penetration Tester with a strong background in infrastructure security testing to join a growing offensive security team. The ideal candidate will have deep technical expertise … deliver complex engagements, and a passion for uncovering and exploiting vulnerabilities across enterprise environments. You will play a key role in strengthening the organisation's security posture by conducting infrastructure-focused assessments, mentoring junior testers, and influencing remediation strategies. Key Responsibilities Deliver internal and external network and infrastructure penetration tests , including on-premises and cloud-hosted environments Perform … testing of Windows & Linux infrastructure, Active Directory, network services, and security appliances Conduct vulnerability exploitation , privilege escalation, and lateral movement to demonstrate full attack paths Lead small engagement teams and oversee delivery quality, documentation, and client communication Produce high-quality, concise, and risk-aligned reports with actionable remediation guidance Support scoping calls, stakeholder workshops, and post-engagement debriefs Contribute More ❯

Senior Infrastructure Penetration Tester Location: London flexible hybrid Salary: £70,000 – £80,000 We’re hiring on behalf of our client, a growing Penetration Testing Consultancy, for a Senior Infrastructure Penetration Tester to join their elite Testing team. This role is ideal for someone who thrives on deep technical challenges, values autonomy, and enjoys working in … a fast paced and growing environment. What You’ll Be Doing Leading infrastructure penetration tests across complex environments (on prem, cloud, hybrid). Identifying and exploiting vulnerabilities in networks, systems, and configurations. Developing custom tooling and scripts to support testing and reporting. Conducting technical research and publishing internal findings or blogs. Supporting threat modelling and contributing to detection engineering … efforts. Working closely with clients to provide solutions and deliver elite technical assessments. What You Bring Strong hands on experience in infrastructure penetration testing. Ability to work independently and think creatively. Strong consultative experience, ability to work closely with various clients and discuss on both technical and non technical levels. More ❯

Senior Infrastructure Penetration Tester Location: London flexible hybrid Salary: £70,000 – £80,000 We’re hiring on behalf of our client, a growing Penetration Testing Consultancy, for a Senior Infrastructure Penetration Tester to join their elite Testing team. This role is ideal for someone who thrives on deep technical challenges, values autonomy, and enjoys working in … a fast paced and growing environment. What You’ll Be Doing Leading infrastructure penetration tests across complex environments (on prem, cloud, hybrid). Identifying and exploiting vulnerabilities in networks, systems, and configurations. Developing custom tooling and scripts to support testing and reporting. Conducting technical research and publishing internal findings or blogs. Supporting threat modelling and contributing to detection engineering … efforts. Working closely with clients to provide solutions and deliver elite technical assessments. What You Bring Strong hands on experience in infrastructure penetration testing. Ability to work independently and think creatively. Strong consultative experience, ability to work closely with various clients and discuss on both technical and non technical levels. More ❯

Infrastructure and Software Tester +Permanent opportunity +Hybrid working on site in London 2/3 days a week +£42,000 - £45,000 Skills: +Software Testing experience +Infrastructure Testing experience +AWS/Azure +API +Manual and automated testing experience We’re looking for a hands-on Tester who’s as comfortable checking infrastructure deployments and systems … role. We need someone with strong technical grounding, curiosity, and the confidence to dive into environments beyond just the front end. Key Responsibilities Execute and maintain test plans for infrastructure, backend services, and application layers. Validate deployments, configuration changes, and environment stability across cloud and on-prem environments (AWS, Azure, GCP, CI/CD). Perform integration, regression, and … early in the lifecycle. Contribute to continuous improvement of QA practices, tools, and processes. Skills & Experience Proven experience in software testing (manual and/or automated). Familiarity with infrastructure and deployment environments such as AWS, Azure, GCP, or on-premises. Experience testing APIs, services, and integration points , not just front-end UI. Strong analytical mindset and attention to More ❯

Infrastructure and Software Tester +Permanent opportunity +Hybrid working on site in London 2/3 days a week +£42,000 - £45,000 Skills: +Software Testing experience +Infrastructure Testing experience +AWS/Azure +API +Manual and automated testing experience We’re looking for a hands-on Tester who’s as comfortable checking infrastructure deployments and systems … role. We need someone with strong technical grounding, curiosity, and the confidence to dive into environments beyond just the front end. Key Responsibilities Execute and maintain test plans for infrastructure, backend services, and application layers. Validate deployments, configuration changes, and environment stability across cloud and on-prem environments (AWS, Azure, GCP, CI/CD). Perform integration, regression, and … early in the lifecycle. Contribute to continuous improvement of QA practices, tools, and processes. Skills & Experience Proven experience in software testing (manual and/or automated). Familiarity with infrastructure and deployment environments such as AWS, Azure, GCP, or on-premises. Experience testing APIs, services, and integration points , not just front-end UI. Strong analytical mindset and attention to More ❯

Infrastructure and Software Tester +Permanent opportunity +Hybrid working on site in London 2/3 days a week +£42,000 - £45,000 Skills: +Software Testing experience +Infrastructure Testing experience +AWS/Azure +API +Manual and automated testing experience We’re looking for a hands-on Tester who’s as comfortable checking infrastructure deployments and systems … role. We need someone with strong technical grounding, curiosity, and the confidence to dive into environments beyond just the front end. Key Responsibilities Execute and maintain test plans for infrastructure, backend services, and application layers. Validate deployments, configuration changes, and environment stability across cloud and on-prem environments (AWS, Azure, GCP, CI/CD). Perform integration, regression, and … early in the lifecycle. Contribute to continuous improvement of QA practices, tools, and processes. Skills & Experience Proven experience in software testing (manual and/or automated). Familiarity with infrastructure and deployment environments such as AWS, Azure, GCP, or on-premises. Experience testing APIs, services, and integration points , not just front-end UI. Strong analytical mindset and attention to More ❯

Infrastructure and Software Tester +Permanent opportunity +Hybrid working on site in London 2/3 days a week +£42,000 - £45,000 Skills: +Software Testing experience +Infrastructure Testing experience +AWS/Azure +API +Manual and automated testing experience We’re looking for a hands-on Tester who’s as comfortable checking infrastructure deployments and systems … role. We need someone with strong technical grounding, curiosity, and the confidence to dive into environments beyond just the front end. Key Responsibilities Execute and maintain test plans for infrastructure, backend services, and application layers. Validate deployments, configuration changes, and environment stability across cloud and on-prem environments (AWS, Azure, GCP, CI/CD). Perform integration, regression, and … early in the lifecycle. Contribute to continuous improvement of QA practices, tools, and processes. Skills & Experience Proven experience in software testing (manual and/or automated). Familiarity with infrastructure and deployment environments such as AWS, Azure, GCP, or on-premises. Experience testing APIs, services, and integration points , not just front-end UI. Strong analytical mindset and attention to More ❯

Infrastructure and Software Tester +Permanent opportunity +Hybrid working on site in London 2/3 days a week +£42,000 - £45,000 Skills: +Software Testing experience +Infrastructure Testing experience +AWS/Azure +API +Manual and automated testing experience We’re looking for a hands-on Tester who’s as comfortable checking infrastructure deployments and systems … role. We need someone with strong technical grounding, curiosity, and the confidence to dive into environments beyond just the front end. Key Responsibilities Execute and maintain test plans for infrastructure, backend services, and application layers. Validate deployments, configuration changes, and environment stability across cloud and on-prem environments (AWS, Azure, GCP, CI/CD). Perform integration, regression, and … early in the lifecycle. Contribute to continuous improvement of QA practices, tools, and processes. Skills & Experience Proven experience in software testing (manual and/or automated). Familiarity with infrastructure and deployment environments such as AWS, Azure, GCP, or on-premises. Experience testing APIs, services, and integration points , not just front-end UI. Strong analytical mindset and attention to More ❯

Infrastructure Penetration Tester | CHECK | CREST | CSTL/CTL | Networking | Config Reviews | API Testing | Contract Pen Testing | Infrastructure | External & Internal Networks | SR2 is partnered with a leading security consultancy on a significant multi-phase testing programme, and we’re looking for an experienced Infrastructure Penetration Tester to join the team. This role will focus on delivering … a small team of experienced testers to support a major client undergoing large-scale change, ensuring their environment is secure and compliant. Key Responsibilities: Conduct comprehensive external and internal infrastructure penetration tests , starting with perimeter systems and moving into internal networks Perform configuration reviews across servers, firewalls, routers, and network devices Execute API security testing to assess authentication, data … access, and integration risks Deliver “old-school” CHECK-style network and infrastructure testing in line with industry standards Produce detailed technical reports outlining vulnerabilities, exploitation paths, and remediation guidance Collaborate with the project lead and wider team across a six-phase testing programme Engage directly with stakeholders and SMEs to ensure smooth onboarding and delivery Skills & Experience Required: Proven More ❯

Infrastructure Penetration Tester | CHECK | CREST | CSTL/CTL | Networking | Config Reviews | API Testing | Contract Pen Testing | Infrastructure | External & Internal Networks | SR2 is partnered with a leading security consultancy on a significant multi-phase testing programme, and we’re looking for an experienced Infrastructure Penetration Tester to join the team. This role will focus on delivering … a small team of experienced testers to support a major client undergoing large-scale change, ensuring their environment is secure and compliant. Key Responsibilities: Conduct comprehensive external and internal infrastructure penetration tests , starting with perimeter systems and moving into internal networks Perform configuration reviews across servers, firewalls, routers, and network devices Execute API security testing to assess authentication, data … access, and integration risks Deliver “old-school” CHECK-style network and infrastructure testing in line with industry standards Produce detailed technical reports outlining vulnerabilities, exploitation paths, and remediation guidance Collaborate with the project lead and wider team across a six-phase testing programme Engage directly with stakeholders and SMEs to ensure smooth onboarding and delivery Skills & Experience Required: Proven More ❯

Infrastructure Penetration Tester | CHECK | CREST | CSTL/CTL | Networking | Config Reviews | API Testing | Contract Pen Testing | Infrastructure | External & Internal Networks | SR2 is partnered with a leading security consultancy on a significant multi-phase testing programme, and we’re looking for an experienced Infrastructure Penetration Tester to join the team. This role will focus on delivering … a small team of experienced testers to support a major client undergoing large-scale change, ensuring their environment is secure and compliant. Key Responsibilities: Conduct comprehensive external and internal infrastructure penetration tests , starting with perimeter systems and moving into internal networks Perform configuration reviews across servers, firewalls, routers, and network devices Execute API security testing to assess authentication, data … access, and integration risks Deliver “old-school” CHECK-style network and infrastructure testing in line with industry standards Produce detailed technical reports outlining vulnerabilities, exploitation paths, and remediation guidance Collaborate with the project lead and wider team across a six-phase testing programme Engage directly with stakeholders and SMEs to ensure smooth onboarding and delivery Skills & Experience Required: Proven More ❯