Systems Administrator

act digital; Lisboa; Hybrid; EUR 50,000 - 75,000; Full time

Job summary

act digital in Alfragide is seeking an experienced Systems Administrator (OpenShift/VMware) to manage enterprise virtualization platforms and drive containerization initiatives in a hybrid setting with 3 days on-site per week.

You will deploy and maintain Red Hat OpenShift and Kubernetes clusters, administer VMware virtualization, and support containerization while ensuring performance, security, and operational standards across the environment.

Qualifications

• Experience administering Red Hat OpenShift and Kubernetes clusters.
• Strong VMware virtualization administration.
• Solid Linux and Windows OS fundamentals; basic networking/storage knowledge.
• Scripting skills: Bash or shell scripting.
• Hybrid work setup: 3 days on-site in Alfragide.
• Ability to adapt and collaborate with cross-functional teams.

Responsibilities

• Deploy, configure, upgrade and maintain OpenShift/Kubernetes clusters and VMware environments.
• Assist software teams in containerization and runtime availability.
• Monitor clusters for stability, performance and security; perform root-cause analyses with Dev teams.
• Create and maintain technical docs, procedures, and baseline OpenShift settings.

Skills

OpenShift

Kubernetes

VMware

Linux/Windows

Shell scripting

Analytical thinking

Tools

Ansible

PowerCLI

Job description

Are you an experienced Systems Administrator looking to manage enterprise virtualization platforms while driving containerization initiatives? Ready to take charge of cluster resilience, security, and workload scalability?

At act digital, we are currently recruiting a Systems Administrator (OpenShift/VMware) to join a key infrastructure project in a hybrid setup based in Alfragide (3 days on-site per week).

What You Will Do

• Cluster Management: Deploy, configure, upgrade, and maintain Red Hat OpenShift / Kubernetes clusters and VMware virtualization environments.
• Enable Containerization: Actively assist software engineering teams in their containerization journey, enforcing architecture best practices and runtime availability.
• Monitoring & Troubleshooting: Continuously monitor managed clusters for stability, performance, and security; execute root-cause analyses and technical troubleshooting alongside development teams.
• Documentation & Operations: Author, update, and maintain technical documentation, operational procedures, and baseline settings for OpenShift platforms.

What We Are Looking For

• Container Orchestration: Proven hands‑track record administering and maintaining Red Hat OpenShift and Kubernetes environments.
• Virtualization Platforms: Solid background in the administration of VMware infrastructure.
• Operating Systems & Infrastructure: Strong fundamentals in both Linux and Windows operating systems, along with core knowledge of networking and storage.
• Scripting: Practical ability to write and maintain automation scripts using Bash, ksh, or general Shell scripting.
• Soft Skills: High adaptability to dynamic environments, strong analytical and problem-solving skills, rigorous attention to detail, and effective team communication.
• Work Setup: Hybrid model (3 days on-site per week in Alfragide).

Nice to Have

• Familiarity with configuration management tools such as Ansible or PowerCLI.
• Working knowledge of infrastructure security principles and OS hardening standards.

What We Offer

• Direct technical impact on mission-critical platform transformations.
• Long-term stability within an internationally certified Great Place to Work organization.
• A collaborative culture focused on continuous learning, autonomy, and knowledge sharing.