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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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