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Job title

Data Science Engineer

Job Type

Contract (6 Months)

Client / Industry

Software

Location

Reading (Hybrid/ Remote)

Key roles and responsibilities

Design and deliver a sophisticated EDU rSAM (remaining sales addressable market) model to quantify untapped revenue opportunities across global education markets.Partner cross-functionally with key stakeholders to deeply understand the complexities of the education sector, including diverse subscription models, institutional procurement structures, and consortium-based purchasing dynamics.Collaborate with Data Engineering teams to integrate and operationalise third-party datasets e.g. student population and institutional metrics to create rich, actionable customer intelligence profiles.Work closely with the Product Marketing and Sales Strategy teams to align analytical outputs with go-to-market strategies, pricing frameworks, and commercial objectives at the product-offering level.Design, build, and productionise scalable end-to-end data pipelines incorporating normalised customer attributes, behavioural signals, and finalised rSAM outputs.Combine the EDU rSAM with advanced propensity modelling techniques to optimise education-focused sales motions and accelerate customer growth opportunities.Deliver high-impact strategic insights on market opportunity sizing and customer propensity trends to senior leadership, enabling data-driven decision-making and long-term commercial planning.

Skills Looking for:

5+ years of advanced SQL expertise, with a strong track record in querying, cleansing, integrating, and analysing complex datasets at scale, ideally within Databricks environments.Strong Python capabilities for data manipulation, statistical analysis, and predictive modelling.Demonstrated success in developing, validating, and continuously optimising data science models that directly contribute to revenue growth and commercial performance.Experience with propensity modelling and related predictive analytics techniques is highly advantageous.Exceptional ability to translate complex analytical findings into clear, compelling insights for senior stakeholders and cross-functional audiences.Strong analytical thinking and problem-solving skills, with proven success operating in fast-paced, high-growth environments with evolving business priorities.

GCS is acting as an Employment Business in relation to this vacancy.

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As a Senior Cyber Security Engineer, you will play a critical role in delivering cyber strategies, with responsibility for the design, implementation, and ongoing effectiveness of security capabilities across IT and OT environments.

You will engineer and maintain the technical capabilities that enable early threat detection, rapid and consistent response, and sustained cyber risk reduction, while translating cyber risk, regulatory, and business demands into practical, measurable, and operationally sustainable security controls.

This is a hands‑on engineering role for individuals who enjoy building resilient security capabilities, integrating platforms and telemetry, and turning strategy, risk, and incident learnings into practical engineering outcomes. The role requires a strong understanding of security engineering concepts, infrastructure technologies, and best practices, along with the ability to collaborate effectively across IT, OT, and security operations to drive continuous improvement.

You must be able to obtain Counter Terrorist Check (CTC) Clearance to be eligible for this position.

What you'll be doing as a Senior Cyber Security Engineer

Collaborate with stakeholders to design, implement and maintain security controls to meet business, compliance, and risk mitigation requirements; ensuring controls are effective, measurable, and operationally sustainable.Implement and maintain detection and response capabilities through SIEM integration with security controls and IT systems, with a focus on reducing time‑to‑detect and time‑to‑remediate through improved pre‑incident engineering.Participation in a 24x7 on‑call support rota, responding to SIEM health alerts and restoring log ingestion where required.Manage use cases, perform data enrichment, and define standardised and automated containment workflows.Develop and manage operational procedures and reporting methodology.Manage and oversee security technology platforms (e.g. SIEM, SOAR, EDR, and email security).Monitor ongoing control performance and coordinate remediation where gaps are found.Automate operation procedures and reporting processes and integrate outputs into risk reporting frameworks.Liaise with IT and OT teams to ensure controls are implemented according to agreed baselines.Align control design with industry standards, regulations, and best practices. (e.g. NIS, ISO27001, GDPR).Support audits, reviews, and assessments of security controls.Identify and implement improvements to control coverage and resilience.Proactively advise on technology, best practices, and delivery models.

What you should bring to the role

Experience in Security Engineering, with a focus on detection & response engineering in an enterprise environment.Strong understanding of both IT and OT systems and infrastructure.Experience in identifying and remediating cyber risks in evolving digital environments.Familiarity with SIEM, EDR, email security and identity and access management technologies (e.g. Entra ID, CyberArk).Familiarity with a range of operating systems and security considerations across SaaS, IaaS, end-user computing, and server estate.Sound knowledge of cloud and network security technologies.Strong analytical, planning, and organisational skills.Ability to communicate technical issues clearly to non-technical stakeholders.Degree in Cyber Security, Computer Science, Information Technology, Engineering, or a related field.Industry certification(s) such as CISSP, CCSP, CompTIA Security+, or SC-200.

It would be great if you also had

Previous experience working in a large, complex infrastructure-based or water utility organisation.Experience in systems or network administration in IT and/or OT environments.Experience leading or mentoring others in delivering cybersecurity outcomes.Security engineering vendor or product certifications such as Microsoft Certified: Azure Security Engineer Associate, Tenable, or CyberArk.

GCS is acting as an Employment Agency in relation to this vacancy.

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As a Security Penetration Tester, you will be responsible for supporting the design, implementation, and maintenance of TVM (Threat & Vulnerability Management) solutions, controls and processes across the organisation. You will be liaising with Digital teams to ensure appropriate mitigation and remediation of vulnerabilities detected across our IT estate.

This role requires an understanding of TVM concepts, technologies, and best practices, as well as the ability to collaborate effectively with cross-functional teams. The ideal candidate will possess strong communication and will be committed to ensuring the highest level of security, compliance, and user experience.

Security Clearance: CTC (Counter Terrorist Check) clearance is essential. You must currently hold or be able to attain CTC clearance for this role.

What you'll be doing as a Security Penetration Tester

Help support and develop an internal penetration testing function.Conduct network, application penetration testing, code and security reviews.Identify and exploit vulnerabilities through proof-of-concept testing.Support vulnerability management across the enterprise, ensuring that a framework for identification, categorisation and mitigation exists and is implemented and maintained.Responsible for supporting the creation of the operating model for vulnerability management, that it is shared, agreed and operates effectively across the business.Develop and maintain penetration testing documentation, policies, and procedures.Integrate cyber security solutions (e.g. vulnerability scanning tools) with existing systems, applications, and infrastructure.Evaluate and recommend technologies, tools, and vendors to meet business needs.Investigate newly identified cyber security vulnerabilities and provide appropriate mitigation actions.Liaise and coordinate with technology and business stakeholders in relation to cyber security patching and vulnerability management issues/actions.Maintain a cyber threat assessment methodology, align to evolving industry standards and integrate into BAU and project-based business processes.Support with proactive threat hunting for new and emerging cyber threats.Develop and maintain dashboards with cyber security threat and vulnerability metrics.Support compliance with relevant industry standards, regulations, and best practices, such as GDPR, NIS and ISO 27001.

What you should bring to the role

Strong knowledge of manual penetration testing techniques and confident with operating systems and tools such as Tenable, Burp Suite, Kalli Linux.Exposure to remediating vulnerabilities and patch management in a complex business environment.Experience in remediating cyber risks in the ever-changing digital estate.Experience in a penetration testing enterprise environment.Prepare detailed reports and the ability to present findings to key stakeholders.Cyber security industry certification(s) such as CSTM/ CRT/ OSCP/CTL.Understanding of different patching management techniques and approaches for different technology stacks (e.g. SaaS, IaaS, End-User Computing, Server Estate, etc.).Knowledge of TVM concepts, technologies, and best practices, including OSINT tools, vulnerability assessment, threat modelling, etc

GCS is acting as an Employment Agency in relation to this vacancy.

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As a Cyber Threat & Vulnerability Manager, you will play a key role within the Security Operations function, leading the organisation's threat intelligence, vulnerability management, and intelligence-led testing capabilities across both IT and OT environments. Working closely with cybersecurity leadership, enterprise architects, programme delivery teams, and key business stakeholders, you will ensure that Threat and Vulnerability Management (TVM) services are effective, scalable, and continuously improved.

This role contributes to the cyber resilience by driving a risk-based approach to vulnerability management, embedding threat intelligence into operational and strategic decision-making, and enhancing security maturity across the organisation. You will lead a team of specialists, oversee governance and tooling, and ensure that TVM capabilities align with organisational objectives, regulatory requirements, and evolving threat landscapes.

You must be able to obtain Counter Terrorist Check (CTC) Clearance to be eligible for this position.

What you'll be doing as a Cyber Threat & Vulnerability Manager

Lead enterprise vulnerability management, ensuring frameworks for identifying, prioritising, and remediating vulnerabilities are defined, implemented, and continuously improved.Manage the Cyber Threat Intelligence service, ensuring intelligence is collected, analysed, and operationalised to support risk reduction and security operations.Collaborate with technical and business stakeholders to align TVM activities with organisational objectives and risk appetite.Develop and maintain TVM documentation, including policies, standards, procedures, and governance controls.Integrate and optimise vulnerability management, threat intelligence, and assessment tooling across enterprise systems and workflows.Oversee intelligence-informed testing activities, including targeted assessments, exploit validation, and internal testing services.Evaluate and recommend tools, technologies, and vendors to support and enhance TVM capabilities.Investigate newly identified vulnerabilities and coordinate risk-based mitigation and remediation activities.Work closely with technology teams to ensure effective patching, remediation tracking, and resolution of blockers.Maintain and evolve the organisation's cyber threat assessment methodology aligned with industry standards and risk management processes.Lead proactive threat hunting activities to identify emerging threats and suspicious activity across the technology estate.Develop and maintain dashboards, reporting, and operational metrics that demonstrate risk reduction and control effectiveness.Ensure compliance with relevant standards and regulations such as GDPR, NIS, and ISO 27001.Monitor and improve the effectiveness of TVM processes, controls, and supporting technologies.Provide leadership, coaching, and performance management to the TVM and testing team.Build and maintain strong relationships with external intelligence providers, vendors, and delivery partners.Stay current with emerging threats, technologies, and industry best practices to continuously enhance security operations.Support major incident response activities where required as part of Security Operations.

What you should bring to the role

Experience leading or managing threat and vulnerability management processes and controls within a complex enterprise environment.Strong experience in vulnerability remediation and patch management across diverse and evolving technology estates.Experience managing cyber risks within dynamic digital and operational technology environments.Ability to line manage and develop a team of security professionals towards shared objectives.Strong analytical, problem-solving, and decision-making skills.Experience managing third-party delivery partners, vendors, and service providers.Excellent communication skills with the ability to explain complex security concepts to non-technical stakeholders.Strong organisational, planning, and strategic thinking capabilities.Innovative mindset with a focus on continuous improvement and measurable risk reduction.Experience producing operational metrics and dashboards that demonstrate TVM effectiveness and cyber maturity improvements.

Technical experience and skills

Hands-on experience with vulnerability management and threat intelligence tools such as Tenable and Qualys.Strong understanding of TVM concepts, including vulnerability assessment, threat modelling, OSINT, threat intelligence, and penetration testing.Knowledge of patch management approaches across SaaS, IaaS, end-user computing, server, and enterprise technology environments.Experience implementing risk-based approaches to vulnerability prioritisation and remediation.Ability to develop dashboards and reporting that demonstrate control effectiveness, risk reduction, and technical debt management.Experience aligning security practices with frameworks and regulations such as ISO 27001, NIS, and GDPR.

Desirable qualifications and experience

Experience working within utilities, critical infrastructure, or large complex enterprise environments.Experience managing vulnerabilities and cyber risks within operational technology (OT) environments.Familiarity with legacy systems and managing vulnerabilities within ageing technology estates.Experience supporting cyber security transformation programmes and strategic cyber roadmaps.

Desirable technical skills and qualifications

Degree in Cyber Security, Computer Science, Information Technology, Engineering, or a related field.Professional certifications such as CISSP, CISM, or CCSP.TVM-specific certifications such as Certified Threat Intelligence Analyst (CTIA) or Certified Vulnerability Assessor (CVA).Knowledge of penetration testing, ethical hacking, or related security assessment practices.

GCS is acting as an Employment Agency in relation to this vacancy.

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Job Role: Data Science Engineer

Job Type: Contract (Inside IR35)

Location: Reading, UK (2-3 days/week)

Job Description

5+ years of advanced SQL expertise, with a strong track record in querying, cleansing, integrating, and analysing complex datasets at scale, ideally within Databricks environments.Strong Python capabilities for data manipulation, statistical analysis, and predictive modelling.Demonstrated success in developing, validating, and continuously optimising data science models that directly contribute to revenue growth and commercial performance.Experience with propensity modelling and related predictive analytics techniques is highly advantageous.Exceptional ability to translate complex analytical findings into clear, compelling insights for senior stakeholders and cross-functional audiences.Strong analytical thinking and problem-solving skills, with proven success operating in fast-paced, high-growth environments with evolving business priorities.

GCS is acting as an Employment Business in relation to this vacancy.

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As a Control Testing Automation & Monitoring Lead, you will be responsible for designing and delivering automated control testing and monitoring solutions across IT, OT, and business environments. Working closely with the Control Testing & Assurance Manager, digital teams, and a wide range of business stakeholders, you will identify opportunities to automate control testing and implement continuous monitoring solutions that support the organisation's risk and compliance objectives.

This role plays a key part in modernising the control testing programme by introducing automation, improving data collection processes, and enabling more efficient monitoring of control effectiveness. Combining strong automation expertise with a structured, risk-based approach, you will help build a streamlined and scalable automated control testing environment that strengthens security and assurance capabilities.

To be considered for this position, candidates must be eligible to obtain security clearance to a minimum of Counter Terrorist Check (CTC) level

What you'll be doing as a Control Testing Automation & Monitoring Lead

Identify and assess opportunities to automate control testing across IT, OT, and business functions.Design, develop, and implement automation plans and workflows to support continuous monitoring of controls.Evaluate and recommend appropriate tooling and technologies for control testing automation.Collaborate with digital teams to establish reliable data acquisition and integration processes.Conduct regular reviews of automated testing outputs to identify and report control deficiencies.Maintain comprehensive documentation for automation workflows, processes, and exception handling.Engage with project teams, control owners, and key stakeholders to gather requirements and support automation initiatives.Ensure automation initiatives are delivered within expected timelines and aligned with programme objectives.Escalate issues, risks, or delays to the Control Testing & Assurance Manager and contribute to resolving challenges.Support the continuous improvement of the control testing programme through automation and innovation.Stay informed on relevant frameworks and best practices, including NIST CSF and CIS Controls, to enhance automation and monitoring capabilities.

Base location - Berkshire - Hybrid
Working pattern - 36 hours Monday to Friday.

What you should bring to the role

Experience in control testing automation, process automation, or related assurance activities within an enterprise environment.Strong understanding of risk management practices and control frameworks.Ability to measure, monitor, and report on control effectiveness using relevant metrics and data.Experience collaborating with both technical and business teams to deliver automation solutions.Strong analytical and problem-solving skills with the ability to identify opportunities for efficiency improvements.Excellent verbal and written communication skills, including the ability to explain technical concepts to non-technical audiences.Ability to work independently and deliver high-quality outputs in a structured manner.

Technical experience and skills

Expertise in automation tools and scripting technologies such as Python, PowerShell, Robotic Process Automation (RPA) platforms, or audit automation tools.Experience developing and implementing automation workflows related to control testing or assurance processes.Familiarity with IT environments, including IT infrastructure, operational technology (OT), and cloud platforms.Ability to implement monitoring mechanisms and analyse automated testing outputs to identify control weaknesses.Experience documenting automation processes, workflows, and exception management procedures.

Desirable qualifications and experience

Experience working in a regulated environment, utility sector, or large complex critical national infrastructure organisations.Familiarity with governance and control frameworks such as COBIT or COSO.Exposure to cybersecurity principles and domains such as vulnerability management and identity and access management.Experience using data analytics or dashboarding tools such as Power BI or Tableau to visualise and report automation outcomes.

Desirable technical skills and qualifications

Professional certifications such as CISA, CISSP, CRISC, or ISO 27001 Lead Auditor.

GCS is acting as an Employment Agency in relation to this vacancy.

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As a Control Tester, you will play a key role within the Information Security team supporting the Control Testing & Assurance Manager in delivering cybersecurity control testing activities across multiple security domains. Working closely with cybersecurity leadership, service owners, and control owners, you will help ensure security controls are effectively designed, implemented, and operating as intended across the organisation.

This role contributes to the Cybersecurity Control Testing & Assurance programme by assessing control effectiveness, gathering evidence, and supporting the organisation's wider security and compliance objectives. You will collaborate with stakeholders across the business to ensure testing activities are executed efficiently while maintaining high standards of documentation and reporting.

To be considered for this position, candidates must be eligible to obtain security clearance to a minimum of Counter Terrorist Check (CTC) level

What you'll be doing as a Control Tester

Assist in the execution of cybersecurity control testing activities in accordance with defined procedures, templates, and standards.Support the development and localisation of test scripts tailored to specific control environments.Gather and document evidence to assess the design and operational effectiveness of cybersecurity controls.Collaborate with control owners and service owners to clarify control objectives and facilitate smooth testing execution.Maintain accurate documentation for each control assessment, including test plans, results, and supporting evidence.Produce clear and consistent reports detailing testing outcomes and observations.Escalate issues, control deficiencies, or delays to the Control Testing & Assurance Manager.Contribute to the continuous improvement of the control testing framework, methodologies, and documentation.Work with key business stakeholders to support the organisation's cybersecurity and compliance objectives.Support the wider cybersecurity assurance programme through structured testing and evidence-based analysis.

Base location - Berkshire (Hybrid)
Working pattern - 36 hours Monday to Friday.

What you should bring to the role

Experience in IT audit, IT risk, or cybersecurity control testing within an enterprise environment.Understanding of cybersecurity control frameworks and assurance methodologies.Strong analytical and problem-solving skills with the ability to assess control effectiveness.Experience working collaboratively with technical teams and business stakeholders.Ability to manage tasks independently while contributing to team objectives.Strong written and verbal communication skills, including clear documentation and reporting.Good planning and organisational skills with attention to detail.

Technical experience and skills

Understanding of cybersecurity domains, including Threat Intelligence, Vulnerability Management, Security Testing, Security Architecture, Infrastructure Protection, Application Security, Identity and Access Management, Incident Investigation & Response, and Cryptography.Familiarity with information security control frameworks such as COBIT or COSO.Ability to gather, analyse, and document evidence related to the design and operational effectiveness of security controls.Experience in maintaining structured documentation, including test plans, assessment results, and reports.

Desirable qualifications and experience

Experience working in a regulated environment.Experience within large, complex critical national infrastructure organisations.

Desirable technical skills and qualifications

Professional certifications such as CISA, CISSP, CRISC, or ISO 27001 Lead Auditor

GCS is acting as an Employment Agency in relation to this vacancy.

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Key points:

Deliver a stable, secure, and fully supported Windows 11 environment.Minimise operational disruption during the migration.Provide onsite technical support to resolve issues quickly and improve user experience.Ensure all devices meet Windows 11 compliance requirements.

Capture insights and feedback to refine deployment processes and training materials

GCS is acting as an Employment Business in relation to this vacancy.

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Key points:

Deliver a stable, secure, and fully supported Windows 11 environment.Minimise operational disruption during the migration.Provide onsite technical support to resolve issues quickly and improve user experience.Ensure all devices meet Windows 11 compliance requirements.Capture insights and feedback to refine deployment processes and training materialsAbility to resolve technical issues as briefed.Capable of hardware moves, floor walking support, USB‑based imaging, and other project‑related tasks.

GCS is acting as an Employment Business in relation to this vacancy.

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