I’m a versatile Cloud & DevOps Engineer with strong full-stack foundations, helping businesses design, build, and operate secure, scalable cloud solutions. I have hands-on experience across Azure and AWS, working with infrastructure as code (Terraform), CI/CD pipelines (Azure DevOps), cloud networking, identity and access management, and platform security. I regularly support teams with environment design, cost-aware infrastructure decisions, automation, and troubleshooting complex cloud issues. Most recently, I’ve been working heavily in Azure, supporting production environments with: • Azure DevOps CI/CD pipelines • Infrastructure changes using ARM/Terraform • Network and IP SKU upgrades • RBAC and access model improvements • Cloud governance, security, and reliability improvements Alongside DevOps and cloud delivery, I bring solid experience as a Back-End and Front-End Developer, allowing me to work closely with application teams and deliver end-to-end solutions rather than siloed infrastructure. What sets me apart is my ability to bridge engineering and business needs, I communicate clearly, move fast, and deliver work that is practical, secure, and production-ready. I’m comfortable working independently or embedding into existing teams, and I’m especially strong at untangling messy cloud setups and turning them into clean, well-documented, scalable systems.

Cassandra Osijo

I’m a versatile Cloud & DevOps Engineer with strong full-stack foundations, helping businesses design, build, and operate secure, scalable cloud solutions. I have hands-on experience across Azure and AWS, working with infrastructure as code (Terraform), CI/CD pipelines (Azure DevOps), cloud networking, identity and access management, and platform security. I regularly support teams with environment design, cost-aware infrastructure decisions, automation, and troubleshooting complex cloud issues. Most recently, I’ve been working heavily in Azure, supporting production environments with: • Azure DevOps CI/CD pipelines • Infrastructure changes using ARM/Terraform • Network and IP SKU upgrades • RBAC and access model improvements • Cloud governance, security, and reliability improvements Alongside DevOps and cloud delivery, I bring solid experience as a Back-End and Front-End Developer, allowing me to work closely with application teams and deliver end-to-end solutions rather than siloed infrastructure. What sets me apart is my ability to bridge engineering and business needs, I communicate clearly, move fast, and deliver work that is practical, secure, and production-ready. I’m comfortable working independently or embedding into existing teams, and I’m especially strong at untangling messy cloud setups and turning them into clean, well-documented, scalable systems.

Available to hire

I’m a versatile Cloud & DevOps Engineer with strong full-stack foundations, helping businesses design, build, and operate secure, scalable cloud solutions.

I have hands-on experience across Azure and AWS, working with infrastructure as code (Terraform), CI/CD pipelines (Azure DevOps), cloud networking, identity and access management, and platform security. I regularly support teams with environment design, cost-aware infrastructure decisions, automation, and troubleshooting complex cloud issues.

Most recently, I’ve been working heavily in Azure, supporting production environments with:
• Azure DevOps CI/CD pipelines
• Infrastructure changes using ARM/Terraform
• Network and IP SKU upgrades
• RBAC and access model improvements
• Cloud governance, security, and reliability improvements

Alongside DevOps and cloud delivery, I bring solid experience as a Back-End and Front-End Developer, allowing me to work closely with application teams and deliver end-to-end solutions rather than siloed infrastructure.

What sets me apart is my ability to bridge engineering and business needs, I communicate clearly, move fast, and deliver work that is practical, secure, and production-ready.

I’m comfortable working independently or embedding into existing teams, and I’m especially strong at untangling messy cloud setups and turning them into clean, well-documented, scalable systems.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert

Work Experience

DevOps Specialist at Ministry of Defence
March 1, 2025 - April 1, 2025
Upgraded Amazon EKS clusters to newer Kubernetes versions with minimal downtime; aligned Cluster Autoscaler versions with upgrades and verified scaling operations. Created a wiki guide detailing upgrade steps for the Cluster Autoscaler and validation. Developed an EKS performance checklist to assess cluster health, autoscaling behavior, and node efficiency post-upgrade. Ensured ArgoCD remained synced with the EKS cluster, maintaining deployment state visibility. Audited and cleaned obsolete namespaces to streamline cluster management and reduce waste.
DevOps Specialist at Ministry of Defence
December 1, 2023 - November 1, 2024
Led automation of AWS infrastructure using Terraform, reducing deployment times and enhancing scalability. Deployed and managed Kubernetes clusters for secure, scalable container orchestration. Developed and configured Kubernetes deployments for a high-availability microservices architecture. Integrated Prometheus and Grafana for real-time monitoring on an air-gapped SDLC. Mentored a team on Terraform and Ansible scripting, elevating code quality. Managed GitLab CI/CD pipelines; created a secure AWS sandbox environment with VPC, IAM, EC2, and S3. Automated system updates and monitoring tasks with Bash, Python, and PowerShell.
DevOps Engineer & Scrum Master at Ministry of Defence
November 1, 2022 - November 1, 2023
Designed and automated deployment processes and infrastructure for AWS and Azure using PowerShell, Terraform, Terragrunt, Ansible and Bash. Deployed Kubernetes clusters in on-premises and hybrid environments, improving reliability and scalability. Created CI/CD pipelines with Azure DevOps, integrating automated testing and security checks. Managed version control in Azure Repos and configured Azure Active Directory for secure access. Analyzed data with Azure Monitor to troubleshoot network failures. Led daily standups and sprint planning to keep work aligned with goals.
DevOps Engineer at Capgemini - EOP – Home Office
November 1, 2021 - November 1, 2022
Joined platform engineering academy; automated AWS infrastructure with Terraform for consistent, secure deployments. Managed Terraform-based IaC for provisioning scalable resources on Google Kubernetes Engine (GKE). Oversaw Azure Monitor, Cloud Monitoring, and Cloud Logging for performance tracking and troubleshooting. Automated deployments using Cloud Build for CI/CD pipelines to build, test, and deploy applications to GKE. Deployed containerized applications with Docker and Kubernetes, improving portability and reliability. Designed Kubernetes namespaces and RBAC policies for security and workload isolation. Streamlined CI/CD pipelines with Azure DevOps for automated builds and releases.
Software Engineer at BAE Systems
January 1, 2019 - January 1, 2021
Supported and troubleshot applications to maintain stable operations across platforms. Managed data integration and updates in Oracle SQL, handling large datasets. Used Salesforce for client data management and project source control; produced Power BI reports for monthly Business Relations Meetings. Collaborated with cross-functional teams to ensure software delivery met customer requirements and quality standards.

Education

BSc Computing (2:1) at De Montfort University
January 1, 2015 - January 1, 2019
A-Levels: Chemistry, Psychology, Business Studies at Haberdashers' Hatcham Sixth Form College
January 1, 2013 - January 1, 2015

Qualifications

Add your qualifications or awards here.

Industry Experience

Government, Software & Internet, Professional Services