Hi, I'm

Joel Twumasi

Systems Administrator/Dev Ops who architect and keeps infrastructure running — Linux, networking, cloud, security and automation.

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# About

I'm a systems administrator and DevOps engineer who builds and operates reliable, secure infrastructure. My work sits at the intersection of systems administration, DevOps, and networking — provisioning servers, wiring up networks, and automating everything in between so environments stay stable and reproducible.

On the systems side I run Linux and Windows fleets, harden them, patch them, and keep them monitored. On the DevOps side I treat infrastructure as code, build CI/CD pipelines, and ship changes with confidence. On the networking side I design and troubleshoot the connectivity — DNS, routing, firewalls, VPNs, and load balancing — that ties it all together. Good documentation and sensible automation are what I rely on to turn a fragile setup into one that runs itself.

  • Experience4+ years
  • FocusSysAdmin · DevOps · Networking
  • LocationRemote / On-site
  • StatusOpen to work

# Skills

Operating Systems

  • Linux (RHEL / Ubuntu / Debian)
  • Windows Server
  • Active Directory

Networking

  • TCP/IP · DNS · DHCP
  • Firewalls
  • Load Balancing
  • VLANs

Cloud & Virtualization

  • AWS · Azure
  • VMware
  • Docker
  • Terraform

Automation & Scripting

  • Bash · PowerShell
  • Ansible
  • CI/CD

Monitoring & Logging

  • Prometheus · Grafana
  • Alerting

Security & Backup

  • Hardening · Patching
  • SSL/TLS · PKI
  • Backup & DR
  • IAM

Database Management Software

  • MySQL
  • PostgreSQL

# Certifications

Cisco

Cisco Certified Network Associate (CCNA)

AWS

Certified Solutions Architect – Professional

CompTIA

Security+

Microsoft

Microsoft Certified: Azure Fundamentals

Coursera

Fundamentals of Kubernetes Deployment

Terraform

Terraform Basics: Automating Provisioning of AWS EC2 Instances

Google

Google Project Management Certificate

Red Hat

Fundamentals of Red Hat Enterprise Linux

Atlassian

Version Control with Git

Microsoft

Certified: Identity and Access Administrator Associate

Microsoft

365 Certified: Administrator Expert

CNSS

Certified Network Security Specialist

Coursera

Dive Into Ansible

# Projects & Infrastructure Work

Full-Stack Web App Deployment on AWS

Deployed an Angular frontend with a Java (Spring) and PostgreSQL backend to AWS. Ran the app on EC2 behind an Application Load Balancer with Auto Scaling groups for high availability, used Amazon RDS for a managed PostgreSQL database, and configured Route 53 for DNS routing.

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  • EC2
  • RDS (PostgreSQL)
  • ALB
  • Auto Scaling
  • Route 53
  • Angular
  • Java

Zimbra to Microsoft 365 Migration

Migrated an on-prem Zimbra email system to Microsoft 365. Prepared Active Directory for the migration, then migrated user accounts and mailboxes. As part of the team, I also delivered training on core Microsoft 365 productivity tools — Teams, Outlook, and OneDrive.

  • Microsoft 365
  • Zimbra
  • Active Directory
  • Exchange Online
  • End-User Training

CI/CD Pipeline Automation

Built end-to-end CI/CD pipelines to automate build, test, and deployment workflows. Implemented GitHub Actions for containerized app builds and automated testing, and set up Azure DevOps pipelines for multi-stage releases with approval gates, artifact management, and infrastructure-as-code deployments.

  • GitHub Actions
  • Azure DevOps
  • YAML Pipelines
  • Docker
  • Terraform
  • Automated Testing

Backup & Disaster Recovery

Designed an automated, tested backup and DR strategy with a verified 15-minute recovery objective.

  • Bash
  • Cron
  • S3

# Contact

Want to talk infrastructure, DevOps, Security or an open role? Reach out.

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