Powered by Water, Driven by Purpose
South West Water keeps the South West flowing with safe, reliable drinking water and wastewater services across some of the UK’s most stunning landscapes.
We’re proud to be part of Pennon Group, a leader in the UK water sector, working towards a greener future. Our goals? As well as lowering our carbon footprint, we’re working with partners to plant 300,000 trees, restore peatlands and supporting farmers and landowners to improve water quality and wildlife.
Whether you’re starting out or seeking a new challenge, our scale and ambition create opportunities for you to shape your own career.
Ready to make a splash?
Join our team today.
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Location: Exeter / Hybrid Working
Salary: Up to £45,000 depending on experience & excellent benefits package
Security Clearance: Must hold, or be eligible to obtain and maintain, UK Security Check (SC) clearance
We're looking for a Security Testing & Assurance Specialist to join our Cyber Security team and play a key role in strengthening the resilience of our technology estate. This is an exciting opportunity for an experienced cyber security professional who enjoys combining hands‑on technical testing with strategic assurance activities across enterprise IT and operational technology environments.
You’ll work across a diverse range of technologies, helping to identify vulnerabilities, validate security controls and ensure our systems, people and processes are prepared to defend against evolving cyber threats.
What you’ll be doingAs a Security Testing & Assurance Specialist, you’ll be responsible for planning, coordinating and delivering a broad range of security testing and assurance activities, including:
Defining risk-based security testing strategies and assurance plans for projects, programmes and operational services.
Reviewing solutions, architectures and technical designs to identify security weaknesses and testing requirements.
Conducting application, web, API, infrastructure, cloud, network and identity security assessments.
Identifying vulnerabilities, attack paths and security risks, recommending remediation actions and validating closure.
Planning and delivering adversary simulations, red team‑style assessments, purple team exercises and blue team validation activities.
Testing monitoring, logging, detection and incident response capabilities against recognised threat behaviour.
Designing and facilitating tabletop exercises, crisis management simulations, cyber recovery exercises and executive cyber scenarios.
Producing high‑quality technical and executive‑level reports, documenting findings, risks and recommendations.
Tracking remediation activities and supporting risk treatment through to completion.
Maintaining testing standards, procedures, metrics, dashboards and evidence required for audits and regulatory assurance.
Collaborating with OT specialists to safely deliver assurance activities across operational technology environments.
We’re interested in candidates with demonstrable experience across several of the following areas:
Security testing, penetration testing, security assurance, red teaming, security operations or a related cyber security discipline.
Application, web, API, cloud, infrastructure or network security assessments.
Identifying and communicating technical vulnerabilities, attack paths and control weaknesses.
Producing technical and executive‑facing security reports and recommendations.
Working with project teams, architects and technical stakeholders to validate security controls and remediation activities.
Planning, facilitating or…
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