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IT Security Architect

We're looking for an experienced IT Security Architect to join an established organisation and play a key role in strengthening its security architecture, managing technology risk and ensuring secure solutions across a complex IT environment.

This is an opportunity to work closely with IT, infrastructure, cloud and project teams, helping shape security strategy and embed best-practice security controls across production platforms, new implementations and ongoing technology change initiatives.

Key Responsibilities

Conduct IT security risk assessments, identify vulnerabilities and recommend appropriate mitigating controls.

Provide security architecture guidance throughout the project lifecycle, ensuring security requirements are embedded from design through to implementation.

Translate business and technical requirements into secure, scalable architecture designs.

Assess security risks and controls against recognised industry frameworks and standards.

Define, maintain and enhance enterprise and application security standards for production environments.

Support IT risk management activities, including the identification, assessment and reduction of technology risks.

Evaluate security technologies and recommend solutions aligned with business and technical requirements.

Develop architecture proposals and business cases to support improvements to existing IT environments.

Work with technical and business stakeholders to ensure proposed solutions are secure, practical and fit for purpose.

What They're Looking For

Strong xperience in IT Security Architecture or a closely related discipline.

Strong experience designing and implementing security architectures for complex, multi-component enterprise systems.

Experience developing conceptual, logical and physical security architecture documentation.

Demonstrable knowledge of cybersecurity frameworks and standards, including:

ISO 27001

NIST Cybersecurity Framework

PCI DSS

CIS Controls

Strong cloud security and architecture experience across AWS and Azure, including cloud-native services and secure integration with on-premises infrastructure and external systems.

A solid understanding of IT risk management, security controls and governance.

Experience working with software engineering and application development teams in complex, multi-project environments.

Ability to assess alternative solutions, provide clear recommendations and influence stakeholders to reduce risk.

A degree in Computer Science, Information Security or a related discipline, or equivalent practical experience.

Relevant certifications such as CISSP, CCSP, CISM, CISA or CRISC would be advantageous.

Interested? If you're an experienced Security Architect looking for your next opportunity, get in touch for a confidential conversation.

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

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Cloud Infrastructure Engineer - Capacity, Forecasting & Automation

We're looking for a Cloud Infrastructure Engineer with a strong analytical mindset to join a fast-moving cloud capacity engineering team.

This position is ideal for someone who understands infrastructure but also enjoys working with data, building models, forecasting growth, and creating automation that makes infrastructure planning more efficient.

You'll serve as a subject matter expert around cloud infrastructure capacity and work across application development, infrastructure, deployment, operations, procurement, and finance teams.

What You'll DoDesign and support capacity planning solutions for private cloud infrastructureBuild tools that size and forecast infrastructure requirementsDevelop models to predict future compute resource requirementsAnalyze utilization and performance of compute and storage resourcesSupport capacity management for VM and container platformsForecast data center power, rack, and cooling requirementsAssist with cloud infrastructure architecture and designHelp validate infrastructure designs, bills of materials, and procurement requirementsPartner with compute, storage, and network engineersProvide recommendations around infrastructure scaling and future growthIdentify opportunities to reclaim unused or underutilized capacityAnalyze capacity thresholds and identify potential infrastructure risksSupport infrastructure budgeting and future technology demand planningBuild and improve automated processes and capacity planning toolsDocument planning processes and communicate recommendations across technical teamsWhat You Bring3-5+ years of experience in cloud infrastructure, infrastructure engineering, capacity planning, or a related fieldExperience with private cloud or enterprise infrastructureKnowledge of compute platforms, virtualization, storage, and networkingExperience with infrastructure forecasting, modeling, or utilization analysisStrong analytical and problem-solving abilitiesExperience building automation or improving technical processesAbility to work across application and infrastructure teamsWhy This Role?

You won't simply be maintaining infrastructure. You'll help determine how infrastructure should grow, where capacity is needed, how resources are being utilized, and how the organization can plan and spend more efficiently.

If you're an infrastructure engineer who enjoys capacity modeling, forecasting, automation, and solving large-scale infrastructure problems, this role offers an opportunity to work on some very large and complex environments.

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

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Cloud Capacity Engineer | Private Cloud Infrastructure

We're looking for a Cloud Capacity Engineer to join a growing infrastructure engineering team supporting private cloud platforms and enterprise-scale systems.

This role sits at the intersection of cloud infrastructure, capacity planning, forecasting, data analysis, and automation. You'll help determine how much compute, storage, networking, power, rack space, and cooling capacity is needed to support future growth.

You'll work closely with application development teams, infrastructure engineers, operations, procurement, and finance to make sure infrastructure capacity aligns with business and technology demands.

What You'll DoBuild and automate tools for infrastructure capacity planning, forecasting, and sizingDevelop forecasting models to predict long-term growth of computing resourcesAnalyze utilization and performance of compute and storage environmentsSupport capacity planning for private cloud environments, including VMs and containersHelp determine data center power, rack, and cooling requirementsValidate infrastructure procurement requirements using models and architecture designsPartner with compute, storage, and network engineering teams on infrastructure designs and bills of materialsSupport infrastructure scaling, future growth, and capacity augmentation decisionsIdentify underutilized resources and opportunities for improved efficiencyPartner with finance on capacity planning and future technology budgetsEvaluate capacity data and thresholds to identify potential performance or availability risksDevelop and maintain infrastructure capacity planning frameworks and inventoryAutomate processes and identify opportunities to improve infrastructure planningWhat We're Looking ForApproximately 3-5+ years of hands-on experience in infrastructure analytics, capacity planning, forecasting, or related engineeringExperience working with cloud or private cloud infrastructureUnderstanding of compute, virtualization, storage, and networkingExperience with data analysis, modeling, forecasting, or capacity managementStrong analytical and problem-solving skillsExperience automating tools or processesAbility to work cross-functionally with application and infrastructure engineering teams

If you enjoy using data and engineering to answer "How much infrastructure do we need, when will we need it, and how can we use it more efficiently?" this could be a great opportunity.

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

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Solutions Architect - Tier 1 Bank - Canary Wharf

Role - Application Architect

Duration - 6 months with very likely extension

Location - Hybrid / Canary Wharf - 3 days per week in a Canary Wharf office

Rate - £600 per day (Inside IR35)

Experience -

In depth understanding of Object Orientated programming concepts as well as of the full Software Development Life Cycle.Good understanding of MS .NET Framework environments.Knowledge and experience of Agile methodologyKnowledge of Cloud and AI technologies that can be adopted into the workplaceExtensive experience working as a software and solutions architect.Experience in designing of high-level concepts for software solutions.Experience in development of Azure cloud-based as well as on-prem solutions.DevOps and SCRUM experienceExperience in Cloud migration planning and execution

Tasks -

Create and improve architectural standards for on premise and azure cloud software products, develop cloud migration procedures and guidelines.Assist in cloud migration projects, assess readiness and dependencies, optimize for the Cloud.Create and review blueprints for software products, provide guidance on improving architecture.Coding mission critical parts and performing code reviews.Assist on integrating AI technologies to improve existing systems.Ensure that applications are in line with compliance and regulatory standards and conduct regular security assessments of these applications.Technical writing (creating related documentation)Assist developers with any architecture related issues and queries.

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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Solutions Architect - Tier 1 Bank - Canary Wharf

Role - Application Architect

Duration - 6 months with very likely extension

Location - Hybrid / Canary Wharf - 3 days per week in a Canary Wharf office

Rate - £600 per day (Inside IR35)

Experience -

In depth understanding of Object Orientated programming concepts as well as of the full Software Development Life Cycle.Good understanding of MS .NET Framework environments.Knowledge and experience of Agile methodologyKnowledge of Cloud and AI technologies that can be adopted into the workplaceExtensive experience working as a software and solutions architect.Experience in designing of high-level concepts for software solutions.Experience in development of Azure cloud-based as well as on-prem solutions.DevOps and SCRUM experienceExperience in Cloud migration planning and execution

Tasks -

Create and improve architectural standards for on premise and azure cloud software products, develop cloud migration procedures and guidelines.Assist in cloud migration projects, assess readiness and dependencies, optimize for the Cloud.Create and review blueprints for software products, provide guidance on improving architecture.Coding mission critical parts and performing code reviews.Assist on integrating AI technologies to improve existing systems.Ensure that applications are in line with compliance and regulatory standards and conduct regular security assessments of these applications.Technical writing (creating related documentation)Assist developers with any architecture related issues and queries.

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

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Solutions Architect - Tier 1 Bank - Canary Wharf

Role - Application Architect

Duration - 6 months with very likely extension

Location - Hybrid / Canary Wharf - 3 days per week in a Canary Wharf office

Rate - £600 per day (Inside IR35)

Experience -

In depth understanding of Object Orientated programming concepts as well as of the full Software Development Life Cycle.Good understanding of MS .NET Framework environments.Knowledge and experience of Agile methodologyKnowledge of Cloud and AI technologies that can be adopted into the workplaceExtensive experience working as a software and solutions architect.Experience in designing of high-level concepts for software solutions.Experience in development of Azure cloud-based as well as on-prem solutions.DevOps and SCRUM experienceExperience in Cloud migration planning and execution

Tasks -

Create and improve architectural standards for on premise and azure cloud software products, develop cloud migration procedures and guidelines.Assist in cloud migration projects, assess readiness and dependencies, optimize for the Cloud.Create and review blueprints for software products, provide guidance on improving architecture.Coding mission critical parts and performing code reviews.Assist on integrating AI technologies to improve existing systems.Ensure that applications are in line with compliance and regulatory standards and conduct regular security assessments of these applications.Technical writing (creating related documentation)Assist developers with any architecture related issues and queries.

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

Read less

Solutions Architect - Tier 1 Bank - Canary Wharf

Role - Application Architect

Duration - 6 months with very likely extension

Location - Hybrid / Canary Wharf - 3 days per week in a Canary Wharf office

Rate - £600 per day (Inside IR35)

Experience -

In depth understanding of Object Orientated programming concepts as well as of the full Software Development Life Cycle.Good understanding of MS .NET Framework environments.Knowledge and experience of Agile methodologyKnowledge of Cloud and AI technologies that can be adopted into the workplaceExtensive experience working as a software and solutions architect.Experience in designing of high-level concepts for software solutions.Experience in development of Azure cloud-based as well as on-prem solutions.DevOps and SCRUM experienceExperience in Cloud migration planning and execution

Tasks -

Create and improve architectural standards for on premise and azure cloud software products, develop cloud migration procedures and guidelines.Assist in cloud migration projects, assess readiness and dependencies, optimize for the Cloud.Create and review blueprints for software products, provide guidance on improving architecture.Coding mission critical parts and performing code reviews.Assist on integrating AI technologies to improve existing systems.Ensure that applications are in line with compliance and regulatory standards and conduct regular security assessments of these applications.Technical writing (creating related documentation)Assist developers with any architecture related issues and queries.

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

Read less

Solutions Architect - Tier 1 Bank - Canary Wharf

Role - Application Architect

Duration - 6 months with very likely extension

Location - Hybrid / Canary Wharf - 3 days per week in a Canary Wharf office

Rate - £600 per day (Inside IR35)

Experience -

In depth understanding of Object Orientated programming concepts as well as of the full Software Development Life Cycle.Good understanding of MS .NET Framework environments.Knowledge and experience of Agile methodologyKnowledge of Cloud and AI technologies that can be adopted into the workplaceExtensive experience working as a software and solutions architect.Experience in designing of high-level concepts for software solutions.Experience in development of Azure cloud-based as well as on-prem solutions.DevOps and SCRUM experienceExperience in Cloud migration planning and execution

Tasks -

Create and improve architectural standards for on premise and azure cloud software products, develop cloud migration procedures and guidelines.Assist in cloud migration projects, assess readiness and dependencies, optimize for the Cloud.Create and review blueprints for software products, provide guidance on improving architecture.Coding mission critical parts and performing code reviews.Assist on integrating AI technologies to improve existing systems.Ensure that applications are in line with compliance and regulatory standards and conduct regular security assessments of these applications.Technical writing (creating related documentation)Assist developers with any architecture related issues and queries.

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

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AWS Architect - 6-Month Contract

We are looking for an experienced AWS Architect to join a large-scale cloud transformation programme on an initial 6-month contract.

You will be responsible for designing and delivering secure, scalable and resilient AWS solutions, working closely with engineering, infrastructure, security and application teams. The role is hands-on and suited to an architect who can translate business requirements into practical cloud solutions and support teams through implementation.

Key Responsibilities

Design and architect scalable, secure and highly available AWS solutions.Lead AWS cloud migration and modernisation initiatives.Define cloud architecture, patterns and best practices.Work closely with engineering teams to ensure architectural designs are successfully implemented.Provide technical guidance across AWS infrastructure, networking, security and IAM.Review existing cloud environments and identify opportunities for optimisation, automation and cost reduction.Support Infrastructure as Code and DevOps practices, particularly Terraform.Develop and maintain architecture documentation and technical standards.Ensure solutions meet security, resilience, performance and compliance requirements.Collaborate with stakeholders to understand technical and business requirements.

Key Skills & Experience

Strong commercial experience as an AWS Architect / Cloud Architect / Senior Cloud Engineer.Extensive experience across core AWS services Strong understanding of AWS networking, security and identity.Proven experience delivering AWS migrations and cloud transformation programmes.Strong Infrastructure as Code experience, ideally Terraform.Understanding of CI/CD and modern DevOps practices.Experience designing highly available, resilient and scalable cloud platforms.Strong understanding of cloud security and best practices.Excellent communication skills with the ability to work with both technical and non-technical stakeholders.

Desirable

AWS Solutions Architect certification.Enterprise-scale AWS experience.Experience with Kubernetes / EKS.Experience with FinOps and AWS cost optimisation.Experience working within regulated or security-conscious environments.

This is a 6-month contract offering the opportunity to work on a significant AWS transformation programme within an enterprise environment.

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

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