Tailoring guide
Systems Administrator resume keywords and example
Systems administrator postings center on keeping servers and identity running: Windows Server and Active Directory, Linux, virtualization with VMware or Hyper-V, Microsoft 365 and Entra ID, patching and backups. Scripting in PowerShell or Bash is listed in many postings and is one of the clearest ways to show you do more than react to tickets. Below are the keywords that repeat, a sample summary, skills grouped by type, and example bullets.
Updated 14 November 2026. Keyword research current as of November 2026, sourced from public ATS keyword guides, not Weydr's own usage data.
Systems Administrator keywords that repeat in job postings
- Windows Server
- Linux (RHEL / Ubuntu)
- Active Directory
- Microsoft 365 / Entra ID
- VMware vSphere
- PowerShell
- Backup & Recovery
- Patch Management
- Group Policy
Only include the ones that are true for you. A keyword you can't back up in an interview costs more than it gains.
Sample professional summary
Systems administrator with 5 years supporting a 600-user organization across Windows Server, Linux and VMware. Manages Active Directory, Group Policy and Microsoft 365, runs patching through Intune and WSUS, and owns backups in Veeam with tested restores. Automates user provisioning and reporting in PowerShell.
Illustrative example. Swap in your own years, domain, tools and results.
Skills to list on a systems administrator resume
Hard skills
- Server installation, configuration and hardening
- Directory and identity management
- Virtualization administration
- Patching and vulnerability remediation
- Backup, restore and disaster recovery testing
- Scripting and task automation
- Monitoring and capacity planning
Soft skills
- Prioritizing outages against routine work
- Clear documentation and runbooks
- Working with help desk and security teams
- Communicating planned downtime
- Vendor management
Tools
- Windows Server
- Active Directory
- Microsoft 365
- Intune
- VMware vSphere
- Hyper-V
- Red Hat Enterprise Linux
- Veeam
- PowerShell
A tailored bullet, before and after
Responsible for server maintenance and user accounts.
Automated new-hire and leaver account handling in PowerShell across Active Directory and Microsoft 365, cutting setup from 45 minutes to 5 per user and closing a gap where disabled accounts kept mailbox access.
Example resume bullets by seniority
Illustrative examples: the companies, numbers and outcomes are made up to show the structure (action, scope, tool, result). Use your own real figures.
Entry level
- Patched 120 Windows and Linux servers monthly through WSUS and a tested rollback plan, bringing critical patch compliance from 70% to 98%.
- Documented 35 server builds and recurring tasks in Confluence, so on-call staff could handle common alerts without escalating.
Mid level
- Moved backups from tape to Veeam with offsite immutable copies, and ran quarterly restore tests that recovered a full file server in under 2 hours.
- Consolidated 40 physical servers onto a 4-host VMware vSphere cluster, cutting hardware renewal costs and freeing half of the server room.
Senior
- Led the move from on-premises Exchange to Microsoft 365 for 1,200 mailboxes with Entra ID hybrid identity and conditional access, finishing with no lost mail.
- Hardened 200 servers against CIS benchmarks with Group Policy and Ansible, closing the high-severity findings from an external penetration test.
Gaps candidates miss most
- Scripting work in PowerShell or Bash with a time saved
- Backup and recovery shown as tested restores, not just "managed backups"
- The size of the environment: users, servers, sites
Common systems administrator resume mistakes
- A list of duties copied from the job description instead of results.
- No numbers for environment size, so the reader can't judge scale.
- Leaving out security work such as patching compliance and hardening.
- Listing old platforms (Windows Server 2008, Exchange 2010) as current strengths.
- Mixing help desk tasks into every bullet, which makes the role read as entry-level support.
Before you stuff in keywords
- Does ATS really reject 75% of résumés?: what the research says about ATS filtering.
- How to tailor your résumé to a job description: what the research says about ATS filtering.
- What an ATS résumé checker can and can't tell you: what the research says about ATS filtering.
- Tailoring a résumé to a job description: a worked example: what the research says about ATS filtering.
- How to explain an employment gap on your résumé: what the research says about ATS filtering.
- How to write a cover letter for a specific job: what the research says about ATS filtering.
- Résumé summary examples, and how to write your own: what the research says about ATS filtering.
- How long should a résumé be?: what the research says about ATS filtering.
- How to write a career change résumé: what the research says about ATS filtering.
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