Field
Systems & Infrastructure
Operate the servers, platforms, and identities applications depend on.
When people say "the server is down", this is whose phone rings. Systems work is about the machines and services underneath everything — operating systems, directories, storage, virtualization — and about the unglamorous discipline of keeping them boring. It is also the most common launch pad into cloud and security.
Inside systems & infrastructure
All 8 roles in this field
Each page covers what you actually do, the technologies, where the work happens, the honest downside, and only then the certifications.
Systems Administrator
Keep the servers, accounts and services running that everyone uses without thinking about them.
Reachable as a first job
Systems Engineer
Own the servers, platforms and services every application quietly depends on.
Usually a second role
Data Center Engineer
Run the physical place where thousands of machines live and talk to each other.
Usually a second role
Database Administrator
Keep the system of record correct, fast, and recoverable.
Usually a second role
Identity Engineer
Own the system that decides who everyone is and what they may reach.
Usually a second role
Platform Engineer
Build the internal platform other engineers deploy onto, so they stop reinventing it.
A senior destination
Security Engineer
Build and run the controls that everyone else’s safety quietly depends on.
Usually a second role
Vulnerability Management Analyst
Know what is broken across ten thousand machines, and what to fix first.
Reachable as a first job
Technologies you’ll meet here
Click any of them for a plain-English explanation.