Cloud Architect: Migration & Modernization

Onyx-Conseil; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

Onyx-Conseil in London is seeking a Cloud Architect to analyse on-premises systems and design strategies to migrate to a secure, scalable cloud-native environment. You will focus on modernising architectures, leveraging managed services, and delivering measurable business and technical benefits while collaborating with stakeholders across multiple teams.

The role covers discovery, cloud design, migration planning, and hands-on execution, with emphasis on security, cost optimisation, and

Qualifications

• Strong experience with on-premise infrastructure (VMware, physical servers, networking, storage).
• Proven experience designing and delivering cloud architectures.
• Deep understanding of core cloud services, networking, and security.
• Experience working closely with technical stakeholders across multiple disciplines.
• Strong communication skills, able to explain complex technical concepts clearly.

Responsibilities

• Analyse existing on-premise infrastructure, applications and integrations; classify workloads using 6Rs and capture non-functional requirements.
• Design target-state architectures aligned with cloud-native best practices.
• Produce architecture artefacts including diagrams, ADRs, migration runbooks and landing zone designs.
• Create and maintain migration plans with sequencing, dependencies, risks and rollback strategies.
• Collaborate with application owners, infrastructure engineers, DevOps teams, security specialists and architects to align requirements.

Skills

VMware

Cloud architectures

Networking

Security

Communication

Tools

Terraform

ARM

Bicep

Pulumi

Docker

Kubernetes

Job description

Onyx-Conseil in London is seeking a Cloud Architect to analyse on-premises systems and design strategies to migrate to a secure, scalable cloud-native environment. You will focus on modernising architectures, leveraging managed services, and delivering measurable business and technical benefits while collaborating with stakeholders across multiple teams.

The role covers discovery, cloud design, migration planning, and hands-on execution, with emphasis on security, cost optimisation, and