System Administrator Resume Examples & Writing Guide

A resume for a sysadmin with about six years of experience in a mid-sized company, written the way an IT manager reads it: environment first (what you ran and how big it was), then what you did to it. The name and employers are made up; the numbers are the kind you can pull from monitoring, ticketing and patch reports.

A sysadmin resume gets two readers: a recruiter who matches keywords, and an IT manager who judges whether you have run an environment like theirs. Both spend under a minute on the first pass.

• Platform match. Windows, Linux or both? On-premises VMware, Azure, AWS or hybrid? If the posting says Windows Server, Active Directory and Azure and your resume leads with Ubuntu and AWS, you are filtered out before anyone reads a bullet. Put the environment in your summary and skills section, in the posting's words.
• Scale. How many servers, VMs, users, sites? A 30-server, 200-user environment is a different job from 1,500 servers across 3 data centers. Managers use the numbers to place you at junior, mid or senior in seconds.
• Evidence you kept things running. Uptime, backup success rate, restore tests, patch compliance, time to restore after an outage. Sysadmin work is invisible when it goes well, so make it visible with numbers.
• Automation. A sysadmin who patches 140 servers by hand is a liability in 2026. PowerShell, Bash, Ansible or Intune on the resume, with a bullet that shows hours saved, moves you up the pile.
• Certifications that match the stack. AZ-104 for an Azure shop, RHCSA for Linux, VCP for VMware. Not because the cert proves skill, but because HR filters on it.

“The first thing I look for is whether they have run something my size. Number of servers, number of users, on-prem or cloud. Then I look for one bullet that shows they fixed something that was broken when they arrived. If both are there, they get a phone screen.”

The skills section on a sysadmin resume is a lookup table for the recruiter and a truth test for the interviewer. Group by category so a recruiter finds "Active Directory" in one second, and list only what you can be quizzed on. Twenty to thirty items across six to eight categories is normal; this is one of the few jobs where a long skills list is expected.

• Include version numbers. "Windows Server 2022" and "RHEL 9" tell a manager you are current; "Windows Server" alone could mean 2008.
• Spell tools the way postings spell them: "Active Directory" not "AD" on first use, "Microsoft 365" not "O365". ATS keyword matching is often literal.
• Soft skills (documentation, on-call reliability, explaining outages to non-technical staff) belong in bullets as evidence, not in the skills list.
• No skill bars or star ratings. They do not parse and managers ignore them.

The formula for a sysadmin bullet: the system, the scale, the tool, and a number that shows the result (uptime, hours saved, cost reduced, compliance raised). Six rewrites of the bullets most sysadmins actually write:

Three lines: your title and years, the environment you run (platforms, scale), and one result with a number. One for each career stage below. Use a summary, not an objective, unless you have no IT experience at all.

No certification is legally required to be a system administrator in the US, but many postings list one or two as required or preferred, and recruiters filter on them. Match the certification to the stack in the posting:

• Windows and Microsoft cloud: Microsoft Certified: Azure Administrator Associate (AZ-104) is the current standard. The old MCSA and MCSE certifications were retired in 2021; if you hold one, list it with the year, but do not expect it to open doors on its own. Microsoft 365 Certified: Administrator Expert (MS-102) helps for Microsoft 365-heavy roles.
• Linux: Red Hat Certified System Administrator (RHCSA) is the one hiring managers trust most because it is a hands-on exam. CompTIA Linux+ and LPIC-1 are recognized but weigh less. Red Hat Certified Engineer (RHCE) for senior Linux and automation roles.
• Virtualization: VMware Certified Professional – Data Center Virtualization (VCP-DCV) for vSphere-heavy shops.
• Cloud: AWS Certified SysOps Administrator – Associate or AWS Certified Solutions Architect – Associate for AWS environments; Google Associate Cloud Engineer for Google Cloud.
• Foundational and security: CompTIA Network+, Security+ and Server+ help at junior level and for government contractors (Security+ is widely accepted for DoD 8140 baseline positions). Cisco CCNA if you also touch switches and firewalls. ITIL 4 Foundation is often "preferred" at larger companies and managed service providers.

List certifications in their own section under the summary or skills, with the full name, exam code and year earned. Renew or drop expired ones; interviewers check. An associate or bachelor's degree in IT or computer science is typical, but plenty of good sysadmins have no degree and a stack of certs, and hiring managers know it.

Almost nobody is hired as a sysadmin with zero IT experience. The realistic path is help desk or desktop support for 1 to 3 years, taking on server tasks, then moving up. Your resume has to show that you have already touched servers, even if your title never said so.

• Pull the server work out of your help desk job and give it its own bullets: Active Directory account changes, Group Policy edits, patching, VM snapshots, backup checks. "Created 300 AD accounts and managed 20 GPOs" is sysadmin experience whatever your title.
• Home lab counts, and IT managers respect it. Give it a short section: "Home lab: 6 VMs on Proxmox (Windows Server 2022 domain controller, Ubuntu web and file servers, pfSense firewall); patching automated with Ansible; documented in GitHub."
• Certifications carry more weight here than at any later stage. Network+, Security+ and one of AZ-104 or RHCSA will get you screened in for junior sysadmin roles. List scheduled exams with the date.
• Internships and volunteer IT for a nonprofit belong on the page with numbers (users supported, machines imaged, tickets closed). Split the skills list into hands-on, working knowledge and studying.
• One page. No objective about "seeking to grow"; write a short profile that names your lab, certifications and any support experience.

Most mid-sized and large employers run applications through Workday, iCIMS, Greenhouse or Taleo, which parse the resume into fields before a person sees it. Sysadmins have long skills lists, and that is exactly what breaks in a two-column template.

• Length: one page for under 8 years of experience, two pages for senior sysadmins and infrastructure leads. Collapse jobs older than 10 years to one line each.
• Single column, standard fonts, no icons, tables or text boxes. Section names the parser expects: Summary, Skills, Certifications, Experience, Education.
• Skills as plain text lines grouped by category, as in the sample. Multi-column skill grids often parse as word soup.
• Text-based PDF named Firstname-Lastname-Resume.pdf unless the posting asks for Word.
• Keywords to mirror from the posting, once each, same spelling: the exact OS versions, "Active Directory", "Group Policy", "Microsoft 365", "VMware vSphere" or "Hyper-V", "Azure" or "AWS", "PowerShell", "backup and disaster recovery", "patch management", "ITIL".
• Mention on-call and after-hours maintenance windows if you have done them; many postings require it.
• No photo, no date of birth, no street address (city and state is enough). Same in the UK, where the document is called a CV.

Before you apply, paste the posting and your resume into the cvplex ATS checker. It shows which platform names are missing and which bullets have no number.