Tier 3 Sysadmins Systems, support, and practical engineering
Operating Systems Infrastructure Orchestration Zero Trust Artificial Intelligence About
Foundations

Infrastructure

The compute, networking, storage, cloud, monitoring, and automation capabilities behind reliable technical environments.

Cloud and Automation

Cloud platforms and repeatable infrastructure delivery.

CL
Cloud Platform

Cloud

Cloud platforms, landing zones, architecture, identity, networking, governance, security, cost management, and operations.

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IaC
Automation

Infrastructure as Code

Terraform, repeatable environments, version-controlled infrastructure, automation, drift management, and controlled change.

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Core Infrastructure

Networking, compute, virtualization, and storage foundations.

NW
Core Infrastructure

Networking

Routing, switching, DNS, connectivity, segmentation, firewalls, performance, and practical troubleshooting.

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VM
Compute Platform

Virtualization

Virtual machines, hypervisors, workload isolation, lifecycle operations, architecture, and resource management.

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ST
Data Platform

Storage

File systems, local storage, network storage, backups, capacity planning, reliability, and data protection.

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Operations

Monitoring, observability, performance, and system awareness.

MO
Operations

Monitoring and Observability

System health, metrics, logs, alerts, dashboards, performance analysis, and operational awareness.

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Tier 3 Sysadmins

Practical lessons from more than 30 years in technical support.