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Overall purpose of the job:

Reporting to the CNI Service Assurance and Orchestration Manager, the overall purpose of the role is to:

Support regulatory compliance within the scope of Operational Technology (OT) and Information Technology (IT) support services providedProvide specific guidance on the operational implementation of controls to support compliance against the following:ISO 27001 - Security ManagementCyber Assessment Framework (CAF)Network Information Systems (NIS)Center for Internet Security (CIS) BenchmarksIEC 62443

Key responsibilities for this job:

Governance

Define and maintain operational policies, standards, and procedures for compliance against OT and IT security frameworksProvide technical compliance guidance to project and engineering teams during new builds and ongoing operations.Support the handover and implementation of compliance processes, procedures and controls within operational engineering teams, as part of service implementation or transition

Risk Management

Identify, assess, and prioritise and compliance risks associated with new implementation projects and existing supported systems.Map compliance framework objectives to technical controls within the scope of supported assets under contract.Review and update controls based on regular assessment.

Compliance

Ensure adherence to regulatory frameworks (e.g., CAF, ISO, CIS, IEC 62443).Ensure adherence to customer contractual compliance obligations.Coordinate audits and manage compliance reporting.

Control Framework

Define technical compliance controls for projects and operational environments.Validate implementation of compliance controls during build phases and monitor effectiveness during support phases.

Monitoring & Reporting

Implement continuous monitoring processes for compliance and risk indicators.Provide regular customer aligned reports on compliance status.

Knowledge and experience required:

Active SC clearance or eligibilityStrong knowledge of regulatory standards and industry frameworks, including:Center for Internet Security (CIS) benchmarkingNetwork and Information Systems (NIS)National Cyber Security Centre (NCSC) Cyber Assessment Framework (CAF)ISO Standards - particularly ISO27001 (Information Security Management)IEC 62443 - especially risk management elementsExpertise in risk assessment methodologies and compliance management tools.Excellent communication and stakeholder engagement skills.Experience of implementation/governance of technical compliance regimes in an operational context - ideally within an OT environment

Working knowledge of some or all the following technology types:Server operating systemsNetworkingFire-wallingVirtualisationEndpoint devicesEncryptionAnti-virus and malwareVulnerability ManagementSecurity information and event management (SIEM)Intrusion Detection and Prevention systems (IDS and IPS)

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

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

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Fiber Engineer

Location: Remote
Contract: 12+ Months

Overview

We are seeking an experienced Fiber Engineer to support fiber network testing, troubleshooting, and remediation activities across ISP and OSP environments. This role will focus on OTDR analysis, fiber characterization, bidirectional testing, and documenting findings to ensure network performance and reliability.

Required Qualifications5+ years of experience in Fiber Optics or TelecommunicationsExperience with ISP and OSP fiber networksStrong expertise with OTDR testing and troubleshootingExperience performing CD/PMD, bidirectional, and power meter/laser testingKnowledge of fusion splicing, fiber repair, and remediationExperience with fiber end-face inspection and cleaningProficiency with Microsoft Word and ExcelStrong communication, documentation, and problem-solving skillsAbility to travel as required for field workKey ResponsibilitiesPerform OTDR testing to validate fiber paths and identify faults, splices, bends, and signal lossConduct fiber characterization, bidirectional testing, and power/loss analysisTroubleshoot fiber network issues and recommend remediation solutionsPerform fusion splicing and fiber repairs as neededPrepare test reports, redlined fiber documentation, and demarcation mapsCoordinate with vendors, project managers, and internal teams to support project executionTravel to customer sites for testing, troubleshooting, and remediation activitiesWhat You'll OwnFiber testing and validationOTDR analysis and troubleshootingRemediation and fusion splicing activitiesTechnical reporting and documentationVendor and stakeholder communicationFiber network performance verificationDeliverablesOTDR, CD/PMD, and power/loss test reportsRedlined fiber path documentation and demarcation mapsDocumented remediation and retest resultsTest findings and recommendations shared with vendors and project stakeholders

Required: Prior experience in Fiber Testing, OTDR Analysis, ISP/OSP Networks, Fiber Characterization, and Telecommunications environments.

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

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

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Senior DevSecOps Engineer

Contract | Dublin City Centre (Hybrid - 2 Days Onsite Per Week)

Overview

I'm looking to speak with Senior DevOps & Cloud Security Engineers to join a high-performing technology team delivering secure, scalable, and cloud-native solutions within a complex enterprise environment.

This role offers the opportunity to work across cloud infrastructure, platform engineering, automation, security, and reliability initiatives. The successful candidate will play a key role in designing, implementing, and supporting modern cloud platforms while driving best practices across DevOps, Security, and Site Reliability Engineering disciplines.

Key Responsibilities

Design, deploy, secure, and support cloud-native platforms and applications within AWS environments.Build and manage infrastructure using Infrastructure as Code (Terraform).Administer and support Kubernetes-based container platforms, including Amazon EKS.Implement secure networking, connectivity, and cloud architecture best practices.Develop and maintain cloud security controls, identity management, and access governance frameworks.Contribute to CI/CD pipeline development and automation initiatives.Champion DevSecOps practices throughout the software delivery lifecycle.Implement monitoring, logging, observability, and alerting solutions to enhance platform reliability.Support Linux-based and containerised workloads across development and production environments.Collaborate with cross-functional engineering, development, security, and operations teams.Troubleshoot complex infrastructure, application, and platform issues.Drive operational excellence through automation, standardisation, and continuous improvement initiatives.Support the ongoing enhancement of cloud governance, resilience, and platform security capabilities.

Required Experience

Strong hands-on experience designing and supporting solutions within AWS cloud environments.Extensive experience with Terraform and Infrastructure as Code methodologies.Commercial experience with Kubernetes and container orchestration platforms.Strong knowledge of cloud networking, security, and enterprise infrastructure design.Experience implementing IAM, security controls, and cloud governance frameworks.Background working within DevOps, Platform Engineering, SRE, or Cloud Operations functions.Experience designing and supporting CI/CD pipelines and deployment automation.Strong Linux administration skills.Experience with monitoring, observability, and operational tooling.Excellent troubleshooting and problem-solving skills across infrastructure and application layers.Understanding of modern application architectures, microservices, and cloud-native technologies.

Desirable Skills

Experience with Python, scripting, or infrastructure automation.Exposure to cloud security, compliance, vulnerability management, or security engineering practices.Experience supporting end-to-end web applications and distributed systems.Knowledge of database technologies within cloud environments.Experience with AWS Landing Zone frameworks and enterprise cloud governance models.Familiarity with platform engineering, zero-trust principles, or security-by-design approaches.

Contract Details

Dublin City CentreHybrid Working Model2 Days Per Week OnsiteCompetitive daily rateLong-term programme of work within a modern cloud and infrastructure environment

This opportunity would suit a Senior DevOps Engineer, Cloud Engineer, Platform Engineer, SRE, or Cloud Security Engineer looking to work across automation, cloud infrastructure, Kubernetes, security, and enterprise-scale platform delivery. If you have any questions, apply and we can have a call today.

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

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Application Security Engineer

You'll join a centralised Application Security team responsible for managing the full lifecycle of security findings reported by customers, internal teams, and third‑party testers.

You'll triage real‑world vulnerability reports, reproduce issues in controlled environments, analyse platform‑level attack surfaces, and collaborate with engineering teams to validate fixes and guide remediation.

Day to Day Responsibilities

Validate vunerabilities, assess scope and impact, determine severity, and recommend remediation paths.vulnerabilities across web, API, and server-side components and privilege escalation.Produce clear, accurate security assessments suitable for both engineering teams and executive level.Partner with development teams on defect filing, patch validation, backport decisions, and fix completeness.Recreate customer scenarios in lab environments to verify reported vulnerabilities and confirm remediation.Review server-side and client-side code to trace attack vectors and validate security fixes.

Desired Experience

Relevant eperience in application security, penetration testing, bug bounty triage, or product security engineering.Strong working knowledge of OWASP Top 10 and modern attack classesAbility to read and trace JavaScript and Java codebases to identify vulnerabilities and validate fixes.Experience writing clear, technically accurate security reports for diverse audiences.Fluency in CVSS scoring, including rationale behind severity decisions.

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

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Cloud Security Architect

Contract

Industry: Global FinTech Platform
Location: Hybrid (Amsterdam)
Contract Length: 6-12 months

About the Role

A leading FinTech provider is modernising its global cloud footprint and requires a Cloud Security Architect to design, implement, and govern cloud security standards across multi‑cloud estates. You will be the senior technical authority shaping how secure‑by‑design cloud services are built.

Key Responsibilities

Design secure architectures across AWS and Azure for high‑volume financial services.Define IaC security standards, encryption baselines, and identity patterns.Lead threat modelling, architectural risk assessments, and cloud posture reviews.Support engineering teams with secure build patterns, guardrails, and security automation.Act as a technical SME for cloud security governance and architectural boards.

Skills & Experience

Expert-level knowledge of AWS/Azure native security services.Strong Terraform, Kubernetes, container security, and CI/CD familiarity.Experience in regulated sectors (finance ideal).

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

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Role: Cloud Security Assessment Specialist - B2B

Duration: 6-month rolling contract

Working Pattern: Krakow, Hybrid (handful of days per month)

GCS Cyber are partnered with a global financial services organisation as they continue to strengthen their Cloud Security Assessment function. This role focuses on ensuring cloud‑hosted services meet mandatory security controls before moving into production. You'll act as a senior cloud security specialist, providing assurance, consultancy, and oversight across complex multi‑cloud environments.

What you'll be doing:

Executing Cloud Security Assessment reviews for cloud‑hosted services and managing reviews raisedProviding cloud security consultancy to engineering and application teams, supporting secure design and smooth transition into production.Assessing and applying cloud security controls, ensuring alignment with HSBC standards and regulatory expectations.Driving continuous improvement across assessment processes, including automation, data‑driven insights, and capability uplift.

Must have:

Strong hands‑on experience with Google Cloud Platform AWS, plus exposure to at least one additional cloud platform (Azure or Alibaba Cloud).Solid understanding of cloud security controls, risk, and control frameworks.Working knowledge of scripting and tooling such as Python, Bash, PowerShell, SQL etc…Excellent stakeholder management and communication skills, with the ability to influence across global technology and business teams.

To find out more, please apply now or send a copy of your CV to [email protected]

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

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Role: Cloud Security Consultant - B2B

Duration: 6-month rolling contract

Working Pattern: Krakow, Hybrid (handful of days per month)

GCS Cyber are working with a global financial services organisation as they continue to strengthen and optimise their Cloud Cyber Security capability. This role focuses on driving cloud security maturity, automation, and governance, with a strong emphasis on Python‑based development alongside hands‑on cyber security expertise.

What you'll be doing:

Designing, developing, and enhancing cloud security solutions and automation using Python web frameworks (e.g. Flask, Django, FastAPI).Assessing and improving cloud security posture and maturity, including cloud security controls, baseline governance, and security scoring initiatives.

Must have:

Strong hands‑on experience securing cloud environments across one or more major cloud providers.Solid background in cyber security governance, including security controls, configuration baselines, and vulnerability assessment (e.g. CVSS).Proven track record delivering well written, well-structured web applications using (but not limited to) Flask, Django, FastAPI

To find out more, please apply now or send a copy of your CV to [email protected]

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

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