The short version: A Systems Administrator resume wins on uptime, reliability, and scale — servers and users supported, uptime percentage, tickets resolved, and hours saved through automation — each one proven with the platforms you ran. Recruiters and applicant tracking systems scan for Active Directory, Windows Server, Linux, VMware, and PowerShell in the top third of the page. Below is a complete sample you can adapt, the keyword bank that gets you found, the salary range, and the mistakes that quietly get sysadmin resumes cut.
What a Systems Administrator actually does
A Systems Administrator keeps an organization's servers, networks, identities, and core IT services running, secure, and available. The role is part infrastructure builder, part reliability owner, part security gatekeeper, and part last line of defense when something breaks — and the resume has to make all of that visible. Hiring managers are not buying a list of platforms; they are buying a stable, secure environment and the confidence that systems will be up when the business needs them.
Day to day, the core responsibilities look like this:
- Administer servers and operating systems — installing, configuring, patching, and hardening Windows Server and Linux hosts, both on physical hardware and in virtual environments.
- Manage identity and access — running Active Directory and Azure AD / Entra ID: user and group provisioning, Group Policy, authentication, single sign-on, and least-privilege access controls.
- Operate virtualization and infrastructure — administering VMware vSphere or Microsoft Hyper-V clusters, storage (SAN/NAS), and increasingly cloud workloads in Azure or AWS.
- Own backup and disaster recovery — designing and testing backup jobs, replication, and DR runbooks so the organization can recover from failure or ransomware within defined RTO/RPO targets.
- Maintain networking services — DNS, DHCP, VPN, firewalls, and TCP/IP troubleshooting that keep connectivity and name resolution working.
- Patch, monitor, and secure — patch management, vulnerability remediation, endpoint protection, MFA, and monitoring/alerting so issues are caught before users feel them.
- Automate repetitive work — scripting in PowerShell, Bash, or Python to automate provisioning, reporting, onboarding, and routine maintenance.
- Support users and resolve incidents — handling escalated tickets, leading incident response, and documenting fixes and runbooks for the wider IT team.
The role overlaps with Network Administrator, IT Administrator, Infrastructure Engineer, and increasingly Cloud and DevOps titles. Many postings blend these labels, so a strong sysadmin resume mirrors the exact title, operating system, and virtualization platform named in the job description it targets.
What hiring managers and ATS look for in a sysadmin resume
Systems administration is a tool-dense field, which means the applicant tracking system filters hard on platform keywords before a human ever reads you. But the platforms alone do not win — the hiring manager wants evidence that you kept things up, kept them secure, and made the environment run with less manual effort. The resumes that get interviews do four things:
- Lead with outcomes, prove with platforms. "Maintained 99.95% uptime across 120 Windows and Linux servers supporting 1,400 users" beats "Responsible for server administration." The metric is the headline; the platform is the receipt.
- Quantify the environment. Number of servers, users, sites, virtual machines, or endpoints supported tells the reader the scale you operate at — a 30-user shop and a 5,000-seat enterprise are very different jobs.
- Show reliability and security wins. Uptime, ticket resolution time, successful DR tests, patch compliance, and incidents prevented are the language IT leaders speak. Even a couple of these signals real ownership.
- Surface the keywords in the top third. The summary and a skills/tools block must contain the operating system, directory service, virtualization platform, and scripting language named in the posting — because that is exactly what recruiters paste into search.
A full Systems Administrator resume example
Here is a complete, realistic sample for a mid-to-senior Systems Administrator. Adapt the names, companies, and numbers to your own record — and keep every metric honest.
Systems Administrator with 8+ years keeping hybrid Windows, Linux, and VMware environments running for mid-size enterprises. Specializes in Active Directory, virtualization, and backup/disaster recovery, with a track record of holding uptime above four nines, cutting incident resolution time, and automating routine work with PowerShell. Calm under pressure during outages and trusted to own infrastructure projects end to end.
- Operating Systems
- Windows Server 2016–2022, RHEL, Ubuntu, CentOS
- Identity & Directory
- Active Directory, Azure AD / Entra ID, Group Policy, ADFS, SSO
- Virtualization
- VMware vSphere/ESXi, Microsoft Hyper-V, vCenter
- Cloud
- Microsoft Azure, Microsoft 365, AWS fundamentals
- Networking
- DNS, DHCP, TCP/IP, VPN, firewalls, VLANs
- Backup & DR
- Veeam, Windows Server Backup, replication, RTO/RPO planning
- Scripting
- PowerShell, Bash, Python (automation & reporting)
- Ops & Security
- Patch management (WSUS/SCCM), MFA, monitoring (Nagios, PRTG), ITIL ticketing
- Maintained 99.95% uptime across 120 Windows and Linux servers and a 40-host VMware vSphere cluster supporting 1,400 users at six sites.
- Led migration from on-prem Exchange to Microsoft 365 for 1,400 mailboxes with zero data loss and under two hours of off-hours downtime.
- Redesigned the Veeam backup and disaster-recovery strategy, achieving a tested RTO of under 30 minutes and passing the organization's first ransomware-recovery tabletop with no gaps.
- Automated user onboarding and offboarding with PowerShell against Active Directory and Azure AD, cutting provisioning time from 45 minutes to 4 per employee.
- Rolled out MFA and tightened Group Policy and least-privilege access ahead of a HIPAA audit, reducing privileged accounts by 60% and clearing the audit with no findings.
- Cut average incident resolution time from 6 hours to 2.5 by standing up PRTG monitoring and documenting runbooks adopted by the full IT team.
- Administered Active Directory, DNS, DHCP, and Group Policy for 600 users across two plants, improving login and authentication reliability and eliminating recurring outages.
- Virtualized 35 aging physical servers onto Hyper-V, reclaiming three racks of hardware and cutting power and maintenance costs by roughly $70K per year.
- Implemented WSUS-based patch management, raising patch compliance from 71% to 98% and closing the vulnerabilities flagged in the prior security assessment.
- Scripted nightly reporting and health checks in PowerShell, removing about 8 hours of manual work per week.
- Resolved 1,800+ help-desk tickets per year for 250 users with a 96% first-contact resolution rate, escalating server and network issues to the infrastructure team.
- Built and imaged workstations and managed endpoint antivirus and backups, standardizing the desktop fleet on a single golden image.
CompTIA Security+ · Microsoft Certified: Azure Administrator Associate · VMware Certified Professional (VCP-DCV) · ITIL Foundation
B.S. in Information Technology — The Ohio State University
Key hard skills, soft skills, and ATS keywords
Use these as a checklist against the posting you are targeting. Include the ones you genuinely have, in the exact phrasing the job description uses, and prove the important ones in a bullet.
Hard skills & tools (the ATS keyword bank)
Soft skills that matter for systems administration
Sysadmin work is a trust-and-judgment discipline as much as a technical one. The soft skills hiring managers probe in interviews — and that belong, demonstrated, in your bullets — are calm troubleshooting under pressure (you are who people call during an outage), clear documentation and communication (runbooks, change records, status updates to non-technical users), prioritization and ownership (juggling tickets, projects, and on-call), security-mindedness, and reliability and follow-through. Show them through outcomes ("led incident response," "authored runbooks adopted org-wide," "passed the audit with no findings") rather than asserting them as adjectives.
Certifications worth listing
| Certification | Why it helps |
|---|---|
| CompTIA Network+ & Security+ | Foundational, widely searched credentials that prove core networking and security competence — strong early-career signals. |
| Microsoft Certified: Azure Administrator Associate (or Windows Server tracks) | Signals depth in the Microsoft stack most enterprises run, plus the cloud direction the role is moving. |
| VMware Certified Professional (VCP-DCV) | Proves hands-on virtualization administration, a near-universal requirement for infrastructure roles. |
| Red Hat Certified System Administrator (RHCSA) or LPIC-1 | Validates real Linux administration skill, which raises your range and broadens the roles you qualify for. |
What Systems Administrators earn
In the United States, Systems Administrators — the Bureau of Labor Statistics category Network and Computer Systems Administrators — typically earn a base salary between about $60,000 and $130,000, with a median in the mid-$90,000s. Junior and early-career roles start in the high five figures; senior, lead, and infrastructure-architect positions, and roles in high-cost metros like the Bay Area, Seattle, and New York, push base salaries past $130,000 — before bonus and on-call premiums. Pay rises fastest with cloud skills (Azure, AWS), virtualization depth, security certifications, automation/scripting experience, and the scale of the environment you can demonstrably run.
Common Systems Administrator resume mistakes
Systems Administrator resume FAQ
What should a Systems Administrator resume focus on?
Uptime, reliability, and the scale of the environment you run — servers and users supported, uptime percentage, ticket volume and resolution time, successful DR tests, and hours saved through automation — each backed by the concrete platforms you used (Windows Server, Active Directory, VMware, Linux, your backup tooling). Hiring managers buy a dependable, secure environment and trust the tools as evidence.
What are the most important keywords on a sysadmin resume?
Active Directory, Windows Server, Linux, VMware (or Hyper-V), PowerShell/Bash, Group Policy, DNS, DHCP, TCP/IP, Microsoft 365 / Azure AD, backup and disaster recovery, and patch management. Cloud terms (Azure, AWS) and security language (MFA, least privilege, vulnerability remediation) are strong differentiators. Mirror the posting's exact phrasing for the OS and virtualization platform.
How much do Systems Administrators make?
Generally about $60,000–$130,000 in base salary in the US, with a median in the mid-$90,000s, and senior, lead, or big-metro roles exceeding $130,000 before bonus and on-call pay.
Do I need certifications on a sysadmin resume?
They aren't mandatory, but Network+/Security+, a Microsoft or Azure certification, VMware VCP, and a Linux credential accelerate the screen — especially early in your career. Production experience keeping environments up still outranks any certificate, so pair credentials with proof.
How long should a Systems Administrator resume be?
One page under roughly ten years of experience; two pages for senior or lead administrators with a deep, multi-environment track record. Keep it dense with outcomes.
Build it free — then put a human on the search
Start your Systems Administrator resume free in Backstage, Marqee's self-serve builder. It keeps your formatting parser-clean, suggests the right keywords from the job description, and tells you what's missing before you submit. When you want the search actually working — not just the document polished — a real Marqee strategist takes over: tailoring and submitting applications on your behalf, running recruiter outreach, and surfacing referrals so you get top billing with the people who hire infrastructure and IT talent, instead of getting lost in the pile.