Career roadmap
Systems Administrator
Keep the servers, identities and endpoints that a business runs on healthy, patched and recoverable.
Before you start SysAdmin
- Willingness to be the person who fixes things
- A home lab, even a single spare machine
- Methodical documentation habits
Operating systems
Deep familiarity with at least one OS family, and working knowledge of the other.
The bulk of server workloads. Package management, services and permissions.
- Users, groups, permissions and sudo
- systemd services, timers and journald
- Package management and repositories
- Filesystems, LVM and disk management
Most enterprises run both. Windows skills widen the job pool considerably.
- Roles, features and server management
- NTFS permissions and sharing
- Group Policy fundamentals
- Event Viewer and troubleshooting
Repetition is the enemy. Scripting is what turns a technician into an engineer.
- Bash scripting and text processing
- PowerShell cmdlets, objects and pipelines
- Scheduled tasks and cron
- Safe, idempotent scripts
Hypervisors are still the substrate under most enterprise workloads.
- VMware or Proxmox fundamentals
- Snapshots, templates and cloning
- Resource allocation and overcommit
- Migration and high availability
Enough to diagnose confidently and speak to the network team precisely.
- IP, subnets, gateways and routing basics
- DNS and DHCP administration
- Firewall rules on hosts
- Packet capture basics
BuildBuild a small network at home: a Linux server, a Windows client, shared storage and centralised logins.
Identity, storage and backup
The three things that end careers when they go wrong: access, data, and recovery.
Active Directory remains the backbone of enterprise identity.
- Active Directory structure and objects
- Group Policy design and troubleshooting
- LDAP, Kerberos and authentication flow
- Entra ID and hybrid identity
Capacity, performance and permissions across shared storage.
- RAID levels and their trade-offs
- SAN and NAS basics
- File shares, quotas and permissions
- Storage monitoring and growth
An untested backup is not a backup. Interviews ask about restores, not backups.
- 3-2-1 rule and immutable copies
- RPO and RTO per system
- Restore testing cadence
- Ransomware-resistant backup design
The unglamorous work that prevents most breaches.
- Patch cycles and maintenance windows
- Testing before broad rollout
- End-of-life OS planning
- Vulnerability reporting and remediation
Knowing before the users call is the difference between admin and firefighter.
- Host and service monitoring
- Disk, memory and capacity alerts
- Centralised log collection
- Alert tuning to reduce noise
BuildSet up centralised identity, shared storage with quotas, and a backup you have restored from.
Automation and cloud
The path out of ticket-driven work and into infrastructure engineering.
Ansible is the usual first step and the most transferable skill here.
- Ansible playbooks and inventories
- Roles and reusable content
- Idempotency and check mode
- Managing Windows with Ansible
Most sysadmin roles now include some cloud, and it is the main growth direction.
- IaaS compute, storage and networking
- Cloud identity and access
- Lift-and-shift migration basics
- Cost visibility
Microsoft 365 and endpoint management dominate day-to-day enterprise administration.
- Microsoft 365 administration
- Intune and endpoint policy
- Email security and routing
- Licence management
The bridge from systems administration to DevOps.
- Docker fundamentals
- Running containerised services
- Compose for small deployments
- When containers are not the answer
The habit that turns this role into a DevOps career.
- Terraform basics
- Version control for infrastructure
- Peer review of changes
- Documentation generated from code
BuildAutomate the entire build of a server from bare metal or template to production-ready.
Security and compliance
Systems administrators hold the keys, which makes them both the target and the control.
CIS benchmarks give you a defensible standard rather than an opinion.
- CIS benchmarks and scoring
- Service minimisation and firewall defaults
- Secure remote access
- Local account and credential hygiene
Domain admin sprawl is the finding on nearly every enterprise audit.
- Least privilege and tiered admin
- Just-in-time elevation
- Service account management
- MFA everywhere
You will be first responder for anything that looks wrong on a server.
- Detecting compromise indicators
- Isolating a host safely
- Preserving evidence
- Escalation to security teams
The plan for when a room, a site, or a provider disappears.
- DR plan structure
- Failover testing
- Documentation that works under stress
- Communication during outages
Producing evidence is a real part of the job in regulated organisations.
- Access reviews
- Change records and approvals
- Log retention requirements
- Asset inventory accuracy
BuildHarden a server to a published benchmark and produce the evidence an auditor would want.
Certification, interviews and career path
Certifications open the first door; automation skills decide the second one.
This is a field where entry-level certification genuinely gets interviews.
- CompTIA A+, Network+, Security+
- Linux certifications: LFCS, RHCSA
- Microsoft endpoint and Azure fundamentals
- Choosing based on target job ads
Scenario questions dominate: something is broken, walk me through it.
- Server won't boot: diagnostic order
- Users cannot log in: where to look
- Disk full at 3am: safe remediation
- Explaining a restore procedure
ITIL vocabulary is expected in most enterprise environments.
- Incident, problem and change management
- Ticket hygiene and SLAs
- Knowledge base writing
- Working a service desk escalation
For this role a documented lab is accepted evidence in place of experience.
- Documented build with diagrams
- Automation scripts in a repo
- Monitoring and backup demonstrated
- Write-up of a problem you solved
Where this role leads, and what to learn to get there deliberately.
- Path to DevOps and cloud engineering
- Path to security operations
- Path to infrastructure architecture
- Skills that transfer to each
BuildA documented home lab with automation, plus a certification that matches your target employers.
SysAdmin tools on your CV
- Linux
- Windows Server
- Active Directory
- PowerShell
- Ansible
- VMware / Proxmox
- Microsoft 365
- Veeam
- Zabbix
What SysAdmin employers ask to see
- A documented home lab with automated builds
- A tested restore from backup, with the runbook
- A hardening project measured against CIS benchmarks
- An entry-level certification matched to your target employers
Among the lowest unemployment rates of any technology role. Less glamorous than cloud-native work, consistently in demand, and the most common entry point into infrastructure careers.
Content last reviewed 2026-08-31. Guidance only — no institute or paid placement is endorsed anywhere in this book.