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System Administrator Resume 2026 - Linux, Windows Server and automation sample free

Антон Литвинов
Антон Литвинов Founder, AI Resume Master
in 𝕏
Published: 25.09.2026 Updated: 25.09.2026

A system administrator resume is read by someone who wants to know one thing: if the primary domain controller died tonight, could you bring it back. Everything else is context. The stack goes first - Linux distribution, Windows Server version, hypervisor, identity platform, backup product - because those are the exact words a recruiter types into the applicant tracking system. Then comes the part most sysadmin resumes skip entirely: scale and outcome. Not 'managed servers', but how many, running what, with what uptime, and what you automated so the work stopped repeating. Scripting is the growth path out of ticket-driven work, so PowerShell, Bash and Ansible belong high on the page, not buried under 'other skills'. Below is a full sample with patching, backup and restore, on-call and automation written in numbers.

What you get

  • A complete system administrator resume sample
  • 3 PDF templates
  • A formula for writing uptime, patching and automation with numbers
  • 6 mistakes that get sysadmin resumes rejected
Create resume → 5 minutes - AI suggestions - ATS friendly
Ready sample

System administrator resume sample

The structure that survives both the parser and the hiring manager: platforms and scale first, then restores and automation, then on-call reality.

Platforms and scale in the first three lines

Red Hat Enterprise Linux, Windows Server, VMware vSphere, Active Directory, Veeam - named as products with versions where you know them, plus how many hosts, sites and users you carried.

Restores, not backups

Everyone configures backups. Write the restore: what you recovered, how long it took, and the recovery time objective you were measured against. That is the sentence that gets the interview.

Automation as the career line

A sysadmin who writes PowerShell and Ansible is applying for a different job than one who clicks through consoles. Put the scripting where it cannot be missed and say what it replaced.

ATS friendly

Standard headings, single column, no photo, no skills matrix in a table or graphic - parsers drop those. One page under ten years of experience, two beyond it.

Sample resume text

Use it as a reference: keep the structure and wording, put in your own facts and numbers.

Marcus Delaney

System Administrator (Windows, Linux, VMware)
Columbus, Ohio
marcus.delaney@example.com
+1 614 555 0142
linkedin.com/in/example

Profile

System Administrator with 6 years running hybrid Windows and Linux infrastructure for a 1,800-employee manufacturer. 240 servers across two data centres and Azure: Windows Server 2019/2022 with Active Directory and Entra ID, RHEL 8/9, VMware vSphere 7, Veeam. Cut monthly patching from three overnight windows to a four-hour automated run, held 99.95% availability on tier-1 services, and restored a failed file cluster in 38 minutes against a 4-hour RTO. RHCSA and AZ-104 certified.

Experience

System Administrator2022 - present

Harwell Industrial Group (manufacturing, 1,800 employees), Columbus, OH

  • Replaced manual patching across 240 Windows and Linux servers with Ansible playbooks and WSUS approval groups: the monthly window fell from three overnight shifts to four hours and patch compliance rose from 71% to 98%
  • Led the migration of 14 physical hosts and 180 virtual machines to a refreshed vSphere 7 cluster with zero unplanned downtime, completed across four weekend windows
  • Rebuilt the backup estate on Veeam with offsite copies and a monthly restore test; recovered a failed file cluster in 38 minutes against a 4-hour recovery time objective
  • Scripted joiner, mover and leaver processing in PowerShell against Active Directory and Entra ID, cutting account provisioning from 45 minutes of manual work to under 3 minutes
  • Carried a one-week-in-four on-call rotation for tier-1 services and reduced mean time to resolve on major incidents from 96 to 41 minutes over two years
Junior System Administrator2020 - 2022

Brightpath Managed Services (MSP, 40 client tenants), Cincinnati, OH

  • Administered Windows Server and Microsoft 365 for 40 client tenants covering roughly 2,600 endpoints, working to contractual response SLAs
  • Standardised client onboarding into a documented build with Intune policies and a scripted baseline, cutting new-tenant setup from 5 days to 1.5
  • Deployed Zabbix monitoring across the client estate and reduced after-hours alert volume by 60% by tuning thresholds and removing duplicate checks
IT Support Technician2019 - 2020

Riverstone Community College, Dayton, OH

  • Handled roughly 60 tickets a week for 900 staff and 6,000 students, resolving 78% at first contact
  • Built the imaging and deployment process for a 400-machine lab refresh using Microsoft Deployment Toolkit

Education

The Ohio State University, Columbus2015 - 2019

B.S. Information Technology

Skills

Windows Server 2019/2022, Active Directory, Group PolicyRHEL 8/9, Ubuntu Server 22.04 LTSVMware vSphere 7, vCenter, Hyper-VVeeam Backup and ReplicationPowerShell, Bash, AnsibleMicrosoft Entra ID, Microsoft 365, IntuneMicrosoft Azure: VMs, storage, networkingZabbix, Grafana, PagerDutyWSUS, patch compliance reportingDNS, DHCP, PKI and certificate management

Certifications

  • Red Hat Certified System Administrator (RHCSA) - 2023
  • Microsoft Certified: Azure Administrator Associate (AZ-104) - 2022
  • CompTIA Security+ - 2021
  • VMware vSphere: Install, Configure, Manage training - 2022

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Profile

System administrator profile summary

Three or four lines: years of experience, the environment you ran (size, operating systems, hypervisor, cloud), the identity and backup platforms you own, and one number that proves you kept it up. The reader is deciding whether to trust you with root and Domain Admin, so vagueness costs you.

If you are moving from help desk, write the summary from what you already administer rather than what you were titled. Imaging, account lifecycle, patch deployment and a scripted onboarding count as administration even when the badge said support.

WeakMotivated IT professional with strong knowledge of servers, networks and troubleshooting. Team player seeking a challenging system administrator role in a growth-oriented company.
StrongSystem Administrator, 6 years, hybrid Windows and Linux. 240 servers across two data centres and Azure: Windows Server 2019/2022 with Active Directory and Entra ID, RHEL 8/9, VMware vSphere 7, Veeam. Cut monthly patching from a three-night manual window to a four-hour Ansible and WSUS run, held 99.95% availability on tier-1 services, and restored a failed file cluster in 38 minutes against a 4-hour RTO.
Tip
Write the distribution and the version, not the family. 'RHEL 8 and 9, Ubuntu 22.04 LTS' is a different claim from 'Linux', and the screening call is exactly where the difference shows.
Skills

System administrator skills for a resume

Two operating system families, an identity platform, a hypervisor, a backup product, a monitoring stack and a scripting language. Every line should survive the question 'walk me through how you did that'.

Hard skills

  • Windows Server 2016/2019/2022: Active Directory, Group Policy, DNS, DHCP, file and print services
  • Linux administration: RHEL, Ubuntu Server, systemd, LVM, SELinux, SSH hardening
  • Identity: Active Directory Domain Services, Microsoft Entra ID, Okta, LDAP, SAML and SSO integrations
  • Virtualisation: VMware vSphere and vCenter, Hyper-V, Proxmox VE, snapshots and resource pools
  • Backup and recovery: Veeam Backup and Replication, Bacula, snapshots, offsite copies, documented restore tests
  • Patch and configuration management: WSUS, Microsoft Intune, Ansible, Puppet, Chef
  • Scripting and automation: PowerShell, Bash, Python, scheduled jobs, idempotent playbooks
  • Monitoring and alerting: Zabbix, Nagios, Prometheus with Grafana, Datadog, PagerDuty rotations
  • Cloud infrastructure: AWS EC2, S3 and IAM, or Microsoft Azure VMs, storage and Entra ID; Terraform basics
  • Storage and services: NFS, SMB, iSCSI, RAID, Nginx and Apache, certificate renewal with Let's Encrypt

Soft skills

  • Staying methodical during an outage instead of changing three things at once
  • Writing a change record a colleague can roll back at 3am without calling you
  • Explaining a maintenance window to people whose work it will interrupt
  • Saying no to a request that would break the security baseline, and offering the safe version
  • Documenting runbooks so the environment is not stored in one person's head
  • Handing over cleanly at the end of an on-call shift
  • Prioritising when a ticket queue and a failing backup job arrive together
  • Working with the network and security teams instead of around them
  • Teaching the help desk to close tickets that used to escalate to you
  • Keeping calm with a user who deleted the folder and then emptied the recycle bin
Experience

How to write system administrator experience

Formula: the environment plus what you built, migrated or automated plus the tool plus a number. Scale, availability, time saved, incidents avoided. A duty list describes the chair; a result describes you.

If you worked for a managed service provider, name the shape of the estate rather than the clients: how many tenants, how many endpoints, which verticals, what the service level agreement was. That tells a reader more than a redacted account name.

Weak- Responsible for server maintenance, backups, user accounts and troubleshooting hardware and software issues.
Strong- Replaced a manual patch process across 240 Windows and Linux servers with Ansible playbooks and WSUS approval groups: the monthly window fell from three overnight shifts to four hours, patch compliance went from 71% to 98%, and no service missed its maintenance SLA in 14 months.
What to include
Environment size - operating systems and hypervisor - what you built, migrated or automated - uptime or RTO met - tickets or hours removed - who you were on-call for.
Education

Education and certifications

Infrastructure is one of the areas where certifications still carry real weight, because they map to a vendor stack an employer already owns. A degree in information technology or computer science helps with corporate filters, but it does not outrank a Red Hat or Microsoft credential plus a lab you can talk about.

  • Degree with institution and graduation year, or 'coursework in' if you did not finish
  • CompTIA A+, Network+, Security+, Server+ and Linux+ for the early career ladder
  • Red Hat Certified System Administrator (RHCSA) and Red Hat Certified Engineer (RHCE)
  • Microsoft Certified: Windows Server Hybrid Administrator Associate (exams AZ-800 and AZ-801)
  • AWS Certified SysOps Administrator - Associate, or Microsoft Certified: Azure Administrator Associate (AZ-104)
  • VMware and LPIC-1 credentials where the employer runs that stack
  • A home lab or homelab repository on GitHub: Proxmox, Ansible roles, Terraform modules you actually use
Careful
List the exact certification name and the year you passed it. An invented or misspelled credential is checked in minutes, and a lapsed one written as current is the fastest way to end a process.
Entry level

System administrator resume with no experience

Nobody hands a stranger Domain Admin. The realistic entry route is help desk or desktop support first, then the administration tasks that get delegated to you, and a resume that makes those tasks visible. A lab is the second route: it proves you can build and break things on your own time.

Build something real and write it like a job. A three-node Proxmox cluster with a domain controller, a Linux file server, monitoring in Zabbix and backups that you have actually restored from is a better talking point than any number of course certificates, because the interviewer can ask you what broke.

  • A documented home lab: hypervisor, directory services, monitoring, backup with a tested restore
  • One finished certification aimed at the stack you want: RHCSA, AZ-104 or Security+
  • Help desk or desktop support experience written with volumes and resolution times
  • Scripts on GitHub: a PowerShell onboarding script, an Ansible role, a backup checker
  • Volunteer or nonprofit IT work, described with what you administered and for how many users

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Mistakes

Common mistakes

A duty list copied from the job description

'Managed servers, performed backups, resolved tickets' describes every sysadmin who ever lived. Replace each line with scale plus outcome, or delete it.

Backups without a single restore

A backup job that has never been restored from is a hope, and experienced hiring managers know it. Write the recovery you performed, the time it took and the objective you met.

Skills written as a wall of acronyms

Thirty technologies in one paragraph reads as a syllabus. Group them by platform, keep what you can be tested on, and drop the products you touched once in 2018.

No scale anywhere

Servers, sites, users, endpoints, tickets, terabytes. A person who ran 15 servers and a person who ran 900 write identical resumes if neither gives a number.

Graphics, tables and skill bars

A five-star rating on Linux tells a reader nothing and an ATS parser often drops the table it lives in. Plain text sections, standard headings, no photo on a US application.

Blurring the line with the network engineer role

Claiming BGP and core switching when your actual work is servers, identity and storage gets found out in the first technical round. Name the network work you really did - VLANs, firewall rules, DNS - and let a network engineer own the rest.

Takeaways

Takeaways

Remember

  • Operating systems, hypervisor and identity platform in the first screen
  • Scale in numbers: servers, users, sites, terabytes
  • One real restore with its recovery time
  • PowerShell, Bash and Ansible placed where they cannot be missed
  • On-call rotation and incident response written honestly
  • Certifications named exactly, with the year
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FAQ

Frequently asked questions

A system administrator owns what runs on the machines: operating systems, directory services and identity, file and application servers, virtualisation, storage, patching and backup. A network engineer owns what connects them: routing and switching, firewalls, VPNs, wireless, load balancers, and protocols such as OSPF and BGP on Cisco, Juniper or Arista hardware. The overlap is real - DNS, DHCP, VLANs and firewall rules get argued over by both - but the interviews diverge sharply. A sysadmin round asks you to recover a domain controller; a network round asks you to read a routing table. Apply for the one whose failure mode you can actually debug, and link to the other on your resume only where you genuinely did the work. See the network engineer page if that side is the better fit.
For a pure Windows shop, no - deep Active Directory, Group Policy, PowerShell and Hyper-V or VMware skills are the hire. But almost every environment picks up Linux eventually through appliances, containers and cloud workloads, and the job postings that pay best ask for both. If you are Windows-only today, the cheapest move is RHCSA-level Linux competence: it roughly doubles the set of postings you can answer honestly.
Enough that repetitive work stops being manual. In practice that means PowerShell for Windows and Active Directory, Bash for Linux, and increasingly Python or Ansible for anything that spans both. You are not expected to write an application. You are expected to turn a forty-step onboarding checklist into a script, and to read someone else's playbook without breaking it. This is also the growth path: automation is what separates a sysadmin from a systems or platform engineer, and it is the skill that moves the pay band.
Yes, and be specific, because it is a question that gets asked in every screening call anyway. Write the rotation - one week in four, for example - the systems in scope, the alerting tool such as PagerDuty or Opsgenie, and something about your incident record: mean time to resolve, major incidents handled, or a postmortem you wrote. Employers want to know you have carried a pager before rather than that you are willing to.
Pick the one that matches the stack you want to be hired into, not the one with the best marketing. For Windows-heavy shops, Microsoft Certified: Windows Server Hybrid Administrator Associate (AZ-800 and AZ-801) or Azure Administrator Associate (AZ-104). For Linux, the Red Hat Certified System Administrator, because it is a hands-on practical exam and hiring managers treat it that way. CompTIA Security+ is worth holding regardless, especially for roles with a government or regulated customer. One finished credential plus a lab you can discuss beats three in progress.
Do not put a number on the resume, and do not trust a figure from an article - infrastructure pay varies enormously by metro, by industry and by whether you are on-call. Read current postings on LinkedIn, Indeed and Dice for your city and experience band, and for employers in the sectors you are targeting. What reliably raises the rate is consistent: automation and infrastructure as code rather than console clicking, cloud administration alongside on-premise, security responsibilities such as hardening and compliance evidence, a specialisation the employer is short of like virtualisation or identity, and being the person who owns the restore rather than the person who files the ticket.
Volunteer for the work nobody wants to own, then write it down. Take over patch deployment, build the imaging process, script the joiner and leaver routine, run the backup verification report. Six months of that gives you three or four resume bullets with numbers attached, which is what an administrator posting is actually screening for. Pair it with one certification aimed at your employer's own stack, because internal moves are the most common route into a first sysadmin title.
Yes - the full sample above, plus the templates on this page. You can build your own resume from any of them in the builder for free and see the finished result; downloading the PDF is paid, by subscription or a one-time payment. The layouts stay ATS safe, which matters because infrastructure postings collect hundreds of applications and the first cut is automated.
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