Systems Administrator Resume Example That Passes ATS Screening
Systems administrator resumes tend to fall into one of two traps: either a wall of technologies with no context for how they were used, or vague descriptions of 'managing infrastructure' that could describe an intern or a director equally well. The strongest sysadmin resumes tie infrastructure work to business uptime, user satisfaction, and cost control. This mistakes-lead layout opens by showing what goes wrong in most sysadmin resumes before presenting a version that gets it right.
Common Systems Administrator Resume Mistakes
Hiring managers reviewing Systems Administrator resumes flag these problems repeatedly. Each one can knock your ATS score or land your application in the rejection pile.
- Listing every technology you have ever touched without providing context for how many servers, users, or environments you managed with each one.
- Describing infrastructure maintenance without any uptime, incident reduction, or performance improvement metrics that prove the quality of your work.
- Omitting automation and scripting achievements, which are the clearest signal that a sysadmin is operating at a mid-level or above rather than doing purely reactive break-fix work.
- Failing to mention cloud experience or migration projects, which are now expected at the mid-level and will only become more important as hybrid environments become the default.
- Writing disaster recovery experience as 'maintained backup systems' without specifying RTO/RPO targets, recovery testing cadence, or the tools used for replication and failover.
- Not including the user population served, which is the number that gives every other metric on the resume its proper scale and context.
Full Resume Sample
Neil Johannsen
Systems Administrator
Professional Summary
Systems administrator with 5 years of experience managing hybrid cloud and on-premises infrastructure across Windows Server and Linux environments. Currently responsible for the uptime, security, and performance of 280 servers (physical and virtual) supporting 1,200 end users at a mid-sized financial services firm. Achieved 99.97% uptime over the past 12 months while reducing unplanned outage incidents by 40% through proactive monitoring and automated remediation. Hold active CompTIA Security+ and Microsoft Azure Administrator certifications.
Experience
Systems Administrator II
Raymond James Financial · St. Petersburg, FL · Jan 2022 - Present
- Administer a hybrid environment of 280 servers (140 VMware ESXi virtual machines, 80 Azure VMs, 60 physical) running Windows Server 2019/2022 and RHEL 8/9, supporting 1,200 employees across 6 branch offices
- Reduced unplanned outage incidents from 18 to 11 per year by implementing Zabbix-based monitoring with automated alerting thresholds, predictive disk capacity warnings, and self-healing scripts for common service failures
- Led the migration of 40 on-premises application servers to Azure IaaS over 9 months, working with application owners to validate compatibility, establish connectivity via site-to-site VPN, and maintain sub-2-second latency for end users
- Manage Active Directory and Group Policy for 1,200 user accounts, maintaining security baselines aligned with CIS benchmarks and processing an average of 35 account provisioning and deprovisioning requests per week
- Designed and tested the disaster recovery runbook for 12 Tier 1 business applications, reducing documented RTO from 8 hours to 3 hours through Azure Site Recovery and automated failover scripting
Junior Systems Administrator
Publix Super Markets - Corporate IT · Lakeland, FL · Mar 2020 - Dec 2021
- Supported a fleet of 500+ Windows workstations and 60 servers across corporate offices and distribution centers, handling Tier 2 and Tier 3 escalations for server performance, connectivity, and application issues
- Automated the monthly Windows patching cycle for 60 servers using WSUS and PowerShell scripting, reducing the patching window from 3 full weekends to 1 weekend per month with zero rollback incidents
- Maintained VMware vSphere environment (3 hosts, 45 VMs), performing capacity planning, snapshot management, and storage allocation in coordination with the senior infrastructure team
- Resolved an average of 22 Tier 2/3 support tickets per week with a 94% first-contact resolution rate, documenting solutions in Confluence to build a knowledge base that reduced repeat escalations by 25%
Education
Bachelor of Science in Information Technology — University of South Florida, 2020
Skills
Operating Systems & Virtualization: Windows Server 2016/2019/2022, Red Hat Enterprise Linux 8/9, VMware vSphere/ESXi 7.x, Microsoft Hyper-V, Azure Virtual Machines, Ubuntu Server
Networking & Security: Active Directory and Group Policy, DNS, DHCP, and TCP/IP, VPN (site-to-site and client), Firewall administration (Palo Alto, pfSense), CIS benchmark compliance, SIEM log management (Splunk)
Automation & Monitoring: PowerShell scripting, Bash scripting, Ansible (configuration management), Zabbix and Nagios monitoring, WSUS patch management, Azure Site Recovery
Cloud & Storage: Microsoft Azure (IaaS, networking, backup), AWS EC2 (basic), NetApp SAN administration, Veeam Backup and Replication, Azure Blob Storage, S3 lifecycle management
Certifications
CompTIA Security+ · Microsoft Certified: Azure Administrator Associate (AZ-104) · VMware Certified Professional - Data Center Virtualization (VCP-DCV) · ITIL 4 Foundation
See how your resume scores against ATS systems
Check Your ATS Score Free →Why This Resume Works
Uptime percentage and outage reduction numbers speak directly to business continuity. 99.97% uptime across 280 servers and a 40% reduction in unplanned outages are the metrics that IT directors and CIOs evaluate when comparing sysadmin candidates. These numbers translate directly into business impact: fewer disruptions for 1,200 users means more productive work hours and fewer angry calls to the help desk. Neil's resume leads with reliability outcomes rather than technology lists, which is the framing that resonates with hiring managers who care about keeping the business running.
The cloud migration bullet demonstrates project leadership, not just operational maintenance. Migrating 40 servers to Azure IaaS over 9 months, coordinating with application owners, and maintaining sub-2-second latency is a project with real scope and real risk. This bullet positions Neil as someone who can plan and execute infrastructure changes, not just maintain what already exists. Mid-level sysadmin roles increasingly require cloud migration experience, and framing it as a led initiative rather than a participated-in task shows ownership and accountability.
The disaster recovery improvement quantifies preparedness in terms executives understand. Reducing documented RTO from 8 hours to 3 hours is meaningful because business leaders think about downtime in terms of revenue lost per hour. By framing DR work as an RTO improvement with a specific before-and-after number, Neil connects infrastructure work to business risk management. The mention of Azure Site Recovery and automated failover scripting also shows the technical approach, satisfying both the IT manager reviewing the resume and the tools-focused ATS screening it.
Automation achievements demonstrate the trajectory from reactive to proactive administration. Reducing patching from 3 weekends to 1, building self-healing scripts, and creating a knowledge base that cut repeat escalations by 25% all tell the same story: Neil automates his way out of repetitive work. This is the trajectory that separates mid-level sysadmins who are ready for senior roles from those who will stay at the same level. Hiring managers reading these bullets see someone who invests in efficiency rather than heroics, which is exactly the mindset that scales.
ATS Keywords for Systems Administrator Resumes
ATS systems scanning Systems Administrator applications look for these terms. The resume above weaves them in naturally rather than listing them outright.
Section-by-Section Writing Tips
Professional Summary
Open with the scale of your environment: server count, user count, and whether the infrastructure is on-premises, cloud, hybrid, or multi-cloud. Include your uptime metrics and any significant reliability improvements you have driven. Name your primary platforms (Windows Server versions, Linux distributions, hypervisors) since these are hard filters for many sysadmin job postings. Mention your highest-value certifications to pass initial screening, but don't list them all here - save the full list for a certifications section.
Experience Section
Every bullet should answer two questions: what infrastructure did you manage, and what was the business impact of your work? Server counts, user populations, uptime percentages, incident reductions, and migration scopes are the numbers that differentiate candidates. Include automation work with before-and-after metrics whenever possible. Name the specific tools and platforms in each bullet so the ATS captures them in context. Avoid bullets that just say 'maintained servers' without scale or outcome.
Skills Section
Organize by domain (OS and virtualization, networking and security, automation and monitoring, cloud and storage) rather than listing every technology alphabetically. Include version numbers for operating systems and platform versions where they matter, because hiring managers filter for specific versions. List scripting languages (PowerShell, Bash, Python) in the automation category rather than in a generic programming section, since the context of how you script matters more than the language itself.
Education Section
A bachelor's degree in IT, computer science, or a related field is common but not always required if certifications and experience are strong. For sysadmin roles, certifications often carry more weight than the degree itself. List your degree concisely and let the certifications section do the heavier credentialing work. If you completed relevant lab work, capstone projects, or homelab environments during your education, mention them only if you lack professional experience to fill the space.