Systems Administrator Resume Examples by Level (2026)

Systems Administrator Resume Examples & Templates for 2025

TL;DR / Key Takeaways

• **Lead with infrastructure scale and uptime metrics** -- hiring managers want to see the number of servers, endpoints, and users you supported along with SLA percentages you maintained (e.g., "99.99% uptime across 450 production servers").
• **Quantify cost savings from automation and cloud migration** -- the strongest sysadmin resumes cite dollar figures tied to Ansible playbooks, Terraform deployments, or VMware consolidation projects that reduced hardware spend or manual labor hours.
• **Align certifications to the job posting** -- with the BLS reporting a median salary of $96,800 and 14,300 annual openings, competition is real; listing credentials like CompTIA Security+, AWS Certified SysOps Administrator, or RHCSA gives you an edge that 70% of applicants lack.
• **Mirror ATS keywords from the posting verbatim** -- terms like "Active Directory," "Group Policy," "disaster recovery," and "hybrid cloud" must appear in your skills section and bullet points or automated screening will reject your resume before a human sees it.

Why This Role Matters

The U.S. Bureau of Labor Statistics counts 331,500 network and computer systems administrator positions nationwide, with a median annual wage of $96,800 as of May 2024. While BLS projects a 4% decline in headcount through 2034, the agency still forecasts roughly 14,300 openings every year driven by retirements and transfers to adjacent roles like cloud engineering and DevOps. That turnover creates steady demand -- but the job itself is transforming. Gartner's 2026 Infrastructure and Operations trends report identifies hybrid cloud management and AI-driven operations as the top forces reshaping the role, and 94% of organizations now use cloud infrastructure in some capacity. The sysadmins who get hired are the ones whose resumes prove they can manage on-premises Active Directory forests *and* AWS VPCs, write Ansible playbooks *and* troubleshoot RAID arrays, enforce zero-trust security policies *and* keep legacy Windows Server 2016 boxes patched. The three resume examples below demonstrate exactly how to present that hybrid skill set at every career stage.

Resume Example 1: Junior Systems Administrator (0-2 Years Experience)

Marcus Chen

**Location:** Austin, TX 78701 | **Phone:** (512) 555-0147 | **Email:** [email protected] | **LinkedIn:** linkedin.com/in/marcuschen

Professional Summary

CompTIA Security+ and RHCSA-certified systems administrator with 1.5 years of experience managing Linux and Windows Server environments supporting 200+ users at a managed services provider. Reduced ticket resolution time by 34% through standardized troubleshooting runbooks and automated 85% of routine account provisioning using PowerShell scripts. Seeking to apply hands-on experience with Active Directory, VMware ESXi, and Nagios monitoring in a mid-size enterprise environment.

Technical Skills

**Operating Systems:** Windows Server 2019/2022, Red Hat Enterprise Linux 8/9, Ubuntu Server 22.04, CentOS Stream 9 **Virtualization:** VMware ESXi 7.0, vCenter Server, Hyper-V **Networking:** TCP/IP, DNS, DHCP, VLANs, VPN (OpenVPN, WireGuard), Cisco IOS **Automation:** PowerShell, Bash, Ansible (basic playbooks) **Monitoring:** Nagios Core, Grafana, Prometheus **Directory Services:** Active Directory, Azure AD Connect, Group Policy **Backup:** Veeam Backup & Replication 12, Windows Server Backup **Cloud:** AWS EC2, S3, IAM (foundational) **Ticketing:** ServiceNow, Jira Service Management

Professional Experience

**Junior Systems Administrator** | Rackspace Technology | Austin, TX | June 2023 -- Present - Administered 180 Windows Server and 70 RHEL virtual machines across 3 VMware ESXi clusters hosting applications for 12 managed services clients, maintaining 99.95% uptime against a 99.9% SLA target - Automated Active Directory user provisioning and deprovisioning for 200+ accounts using a 450-line PowerShell script, reducing onboarding time from 45 minutes to 6 minutes per user (85% reduction) - Resolved an average of 47 Tier 2 infrastructure tickets per week in ServiceNow, achieving a 34% improvement in mean time to resolution over 8 months by creating 22 standardized troubleshooting runbooks - Configured Nagios Core monitoring for 250 hosts and 1,100 service checks, catching 14 disk-space-critical alerts in Q1 2024 before they caused outages and saving an estimated 28 hours of emergency remediation - Deployed Veeam Backup & Replication 12 for 3 new client environments totaling 18 TB of protected data, completing backup verification testing with 100% successful restore rate across all 42 recovery points tested - Assisted senior engineers in migrating 6 on-premises file servers (total 4.2 TB) to AWS S3 with S3 Intelligent-Tiering, reducing monthly storage costs by $1,200 (38% savings) **IT Support Technician** | Dell Technologies | Round Rock, TX | January 2022 -- May 2023 - Provided Tier 1 and Tier 2 desktop support for 350 employees across 2 office locations, resolving 92% of 1,800+ tickets within 4-hour SLA window over 17 months - Imaged and deployed 140 Windows 11 workstations during a company-wide hardware refresh using Microsoft Deployment Toolkit (MDT), completing the rollout 5 days ahead of the 6-week schedule - Managed Group Policy Objects for 350 user accounts and 400 computer objects in Active Directory, implementing 8 new security policies that reduced malware incidents by 60% quarter-over-quarter - Documented 35 knowledge base articles in Confluence covering common hardware failures, VPN connectivity issues, and printer configuration, reducing repeat escalations by 22% **IT Intern** | National Instruments (now NI) | Austin, TX | May 2021 -- December 2021 - Supported server room operations for a 120-rack data center housing 600+ physical and virtual servers, performing weekly hardware health checks that identified 9 failing drives before data loss occurred - Created Bash scripts to automate log rotation and disk usage reporting across 45 Linux servers, freeing 6 hours per week of manual monitoring effort - Assisted with the installation and cabling of 2 new network racks (48 ports each), labeling 192 Ethernet runs per TIA-606-C standards with zero rework required during acceptance testing - Completed inventory audit of 1,200 IT assets using ServiceNow CMDB, correcting 87 discrepancies (7.25% error rate) and bringing asset accuracy to 99.1%

Education

**Bachelor of Science in Information Technology** | Texas State University | San Marcos, TX | May 2021 - Relevant coursework: Network Administration, Operating Systems, Cybersecurity Fundamentals, Database Management

Certifications

• **CompTIA Security+** (SY0-701) -- CompTIA, Issued March 2023
• **Red Hat Certified System Administrator (RHCSA)** -- Red Hat, Inc., Issued September 2023
• **AWS Certified Cloud Practitioner** -- Amazon Web Services, Issued January 2024
• **ITIL 4 Foundation** -- PeopleCert / Axelos, Issued June 2022

Resume Example 2: Mid-Level Systems Administrator (3-6 Years Experience)

Priya Ramirez

**Location:** Denver, CO 80202 | **Phone:** (720) 555-0293 | **Email:** [email protected] | **LinkedIn:** linkedin.com/in/priyaramirez

Professional Summary

Systems administrator with 5 years of progressive experience managing hybrid Windows/Linux environments of 500+ servers across on-premises data centers and AWS. Led a VMware-to-AWS migration that consolidated 120 virtual machines into 48 EC2 instances and cut annual infrastructure costs by $340,000. Holds AWS Certified SysOps Administrator -- Associate and Microsoft Certified: Azure Administrator Associate credentials. Proven track record of achieving 99.99% uptime through proactive monitoring, infrastructure-as-code automation, and zero-trust security hardening.

Technical Skills

**Operating Systems:** Windows Server 2016/2019/2022, RHEL 8/9, Ubuntu Server 20.04/22.04, SUSE Linux Enterprise 15 **Cloud Platforms:** AWS (EC2, S3, RDS, VPC, CloudWatch, Lambda, ELB), Microsoft Azure (VMs, Azure AD, Blob Storage) **Virtualization:** VMware vSphere 7.0/8.0, vCenter, ESXi, Hyper-V 2022 **Automation/IaC:** Ansible (60+ playbooks), Terraform, PowerShell, Bash, Python **Monitoring:** Datadog, Nagios XI, Grafana + Prometheus, AWS CloudWatch **Directory Services:** Active Directory (multi-forest), Azure AD, LDAP, SAML/SSO (Okta) **Containers:** Docker, Kubernetes (EKS), Helm charts **Backup/DR:** Veeam Backup & Replication, AWS Backup, Zerto **Security:** CrowdStrike Falcon, Qualys vulnerability scanning, CIS Benchmarks, Group Policy hardening **Networking:** Cisco Catalyst/Nexus, Palo Alto firewalls, F5 load balancers, BGP, OSPF

Professional Experience

**Systems Administrator III** | Charles Schwab | Denver, CO | March 2022 -- Present - Manage a hybrid infrastructure of 540 servers (320 Windows, 220 Linux) across 2 on-premises data centers and 3 AWS regions supporting 4,500 internal users and 12 customer-facing trading applications with 99.99% uptime - Led migration of 120 VMware virtual machines to 48 right-sized AWS EC2 instances using AWS Migration Hub and Terraform, completing the 8-month project 3 weeks early and reducing annual compute costs by $340,000 (42% savings) - Authored 62 Ansible playbooks automating OS patching, compliance scanning, and configuration drift remediation across all 540 servers, reducing monthly patch cycle duration from 72 hours to 18 hours (75% reduction) - Implemented CrowdStrike Falcon endpoint detection across 540 servers and 3,200 workstations, integrating alert feeds into Datadog dashboards that reduced mean time to detect security incidents from 4.2 hours to 22 minutes - Designed and tested disaster recovery procedures achieving a 15-minute Recovery Time Objective (RTO) and 5-minute Recovery Point Objective (RPO) using Zerto continuous replication, validated through 4 quarterly DR drills with 100% success rate - Hardened 320 Windows servers against CIS Benchmark Level 2 standards using Group Policy, closing 2,400+ configuration findings identified by Qualys vulnerability scans and reducing critical vulnerabilities by 94% **Systems Administrator II** | IBM | Boulder, CO | July 2020 -- February 2022 - Administered 280 RHEL and Ubuntu servers running Java and Node.js applications in a CI/CD-driven environment serving 8 internal development teams totaling 350 engineers - Built Terraform modules provisioning AWS VPC, EC2, RDS, and S3 resources for 6 application stacks, cutting environment provisioning time from 3 days to 45 minutes (97% reduction) - Deployed and managed a 12-node Kubernetes (EKS) cluster hosting 28 containerized microservices, maintaining 99.97% pod availability and handling 2.3 million API requests daily - Migrated 180 user accounts from on-premises Active Directory to Azure AD using Azure AD Connect, enabling SSO through Okta for 14 SaaS applications and eliminating 23 help desk password-reset tickets per week - Reduced unplanned downtime by 68% year-over-year by implementing Datadog synthetic monitoring with 150 custom checks and automated PagerDuty escalation workflows that routed alerts to on-call engineers in under 90 seconds - Executed quarterly Veeam backup restore tests on 280 servers with a 99.6% success rate, identifying and remediating 3 backup job failures that would have resulted in data loss during a real recovery event **Junior Systems Administrator** | Lockheed Martin | Littleton, CO | August 2019 -- June 2020 - Supported classified and unclassified networks across a 400-server environment operating under NIST 800-53 and DISA STIG compliance requirements for 1,200 defense program users - Applied monthly STIG updates to 160 Windows Server 2016/2019 systems using SCCM, maintaining 98.5% compliance score across all quarterly DISA audits - Configured and maintained 4 F5 BIG-IP load balancers distributing traffic across 32 web servers, handling peak loads of 15,000 concurrent sessions with zero dropped connections - Created 18 PowerShell automation scripts for Active Directory group membership auditing, reducing quarterly access review completion time from 5 days to 8 hours (80% reduction)

Education

**Bachelor of Science in Computer Science** | University of Colorado Boulder | Boulder, CO | May 2019 - Dean's List: 6 of 8 semesters; GPA: 3.7/4.0

Certifications

• **AWS Certified SysOps Administrator -- Associate** -- Amazon Web Services, Issued April 2022
• **Microsoft Certified: Azure Administrator Associate** (AZ-104) -- Microsoft, Issued October 2022
• **Red Hat Certified System Administrator (RHCSA)** -- Red Hat, Inc., Issued January 2021
• **CompTIA Security+** (SY0-601) -- CompTIA, Issued March 2020
• **VMware Certified Professional -- Data Center Virtualization (VCP-DCV)** -- VMware by Broadcom, Issued August 2021
• **ITIL 4 Foundation** -- PeopleCert / Axelos, Issued November 2019

Resume Example 3: Senior Systems Administrator (7+ Years Experience)

David Okonkwo

**Location:** Seattle, WA 98101 | **Phone:** (206) 555-0381 | **Email:** [email protected] | **LinkedIn:** linkedin.com/in/davidokonkwo

Professional Summary

Senior systems administrator and infrastructure architect with 10 years of experience designing, deploying, and managing enterprise environments spanning 2,000+ servers, 15,000+ users, and multi-region AWS/Azure deployments. At Amazon, led a 3-person team that migrated 800 EC2 instances across 4 AWS regions to Graviton3 processors, reducing annual compute costs by $1.2 million. Holds AWS Certified Solutions Architect -- Professional and RHCE certifications. Recognized for building self-healing automation platforms that eliminated 12,000 manual intervention hours annually and achieved 99.999% uptime across Tier 1 production systems.

Technical Skills

**Operating Systems:** Windows Server 2012 R2/2016/2019/2022, RHEL 7/8/9, Ubuntu 20.04/22.04/24.04, Amazon Linux 2/2023, SUSE **Cloud Platforms:** AWS (EC2, ECS, EKS, Lambda, S3, RDS, DynamoDB, CloudFormation, Systems Manager, Organizations), Azure (VMs, AKS, DevOps, Policy) **Virtualization:** VMware vSphere 6.5-8.0, vSAN, NSX-T, Nutanix AHV **Automation/IaC:** Terraform (Enterprise), Ansible Tower/AWX, CloudFormation, Puppet Enterprise, Python, PowerShell, Bash **Containers/Orchestration:** Docker, Kubernetes (EKS, AKS, self-managed), Helm, ArgoCD, Istio service mesh **Monitoring/Observability:** Datadog, Splunk Enterprise, Prometheus + Grafana, PagerDuty, AWS CloudWatch, ELK Stack **Security:** CrowdStrike, Tenable Nessus, HashiCorp Vault, AWS IAM/Organizations/SCPs, zero-trust architecture, NIST CSF **Networking:** Cisco Nexus 9000, Arista, Palo Alto PA-5200 series, AWS Transit Gateway, Direct Connect, SD-WAN (Viptela) **Backup/DR:** Commvault, Veeam, AWS Backup, Zerto, Rubrik **ITSM:** ServiceNow CMDB, Change Advisory Board (CAB) leadership

Professional Experience

**Senior Systems Administrator / Infrastructure Lead** | Amazon (AWS Internal IT) | Seattle, WA | January 2021 -- Present - Lead a 3-person infrastructure team managing 2,200 production servers (1,400 Linux, 800 Windows) across 4 AWS regions and 2 on-premises data centers supporting 15,000 corporate users and 38 business-critical applications - Architected and executed migration of 800 EC2 instances from Intel x86 to AWS Graviton3 (ARM64) processors, completing the 14-month project across 4 regions and reducing annual compute spend by $1.2 million (31% savings) - Built a self-healing automation platform using Ansible Tower, AWS Systems Manager, and custom Python Lambda functions that automatically remediates 94% of infrastructure alerts without human intervention, eliminating 12,000 manual hours annually - Achieved 99.999% uptime (5.26 minutes total downtime) across 12 Tier 1 production applications over a rolling 12-month period by implementing multi-AZ deployments, automated failover, and chaos engineering tests using AWS Fault Injection Service - Designed zero-trust network architecture using AWS Transit Gateway, Palo Alto PA-5260 firewalls, and Zscaler Private Access, segmenting 38 application environments and reducing lateral movement attack surface by 87% as validated by CrowdStrike threat assessment - Established Infrastructure-as-Code standards adopted by 6 engineering teams, creating a Terraform module library of 45 reusable modules that provision compliant AWS resources in under 10 minutes and eliminated 100% of manually-provisioned "shadow infrastructure" **Systems Administrator III** | Microsoft | Redmond, WA | April 2018 -- December 2020 - Managed 1,100 Windows Server and 400 Linux servers across Azure and on-premises environments supporting Microsoft's internal developer tooling used by 8,000+ engineers across 3 time zones - Led Active Directory consolidation of 4 separate forests into a single multi-domain forest serving 12,000 user accounts, completing the 9-month migration with zero authentication outages and reducing directory replication overhead by 65% - Deployed Puppet Enterprise to 1,500 servers, writing 85 Puppet modules enforcing configuration compliance and reducing configuration drift incidents from 45 per month to 2 per month (96% reduction) - Implemented Splunk Enterprise for centralized log management ingesting 2.8 TB daily from 1,500 servers, building 24 custom dashboards and 18 automated alert rules that reduced mean time to root cause from 3.5 hours to 35 minutes - Managed $4.8 million annual infrastructure budget, identifying $720,000 in savings through VMware license optimization (converting 200 Enterprise Plus licenses to Standard) and right-sizing 340 over-provisioned Azure VMs - Served as Change Advisory Board (CAB) chair, reviewing and approving 180+ change requests quarterly while maintaining a 99.7% change success rate and zero P1 incidents attributable to approved changes **Systems Administrator II** | Boeing | Everett, WA | June 2016 -- March 2018 - Administered 650 servers (500 Windows, 150 RHEL) in a NIST 800-171 compliant environment supporting 3,200 aerospace engineering users across manufacturing and design facilities - Designed and implemented Commvault backup infrastructure protecting 120 TB of engineering data with 15-minute RPO, successfully recovering 2 production databases during an unplanned SAN failure with zero data loss - Automated monthly Windows Server patching for 500 servers using SCCM and PowerShell, reducing the patch window from 3 weekends to 1 weekend and achieving 99.2% first-pass patch compliance (up from 78%) - Built Nagios XI monitoring covering 650 servers with 4,200 service checks, creating custom plugins for SAN health monitoring that predicted 6 disk failures 48-72 hours before impact, preventing 3 potential production outages **Junior Systems Administrator** | T-Mobile | Bellevue, WA | September 2014 -- May 2016 - Supported 300 Windows and Linux servers in a 24/7 telecommunications environment processing 450,000 customer transactions daily, maintaining 99.95% availability across all production systems - Deployed VMware vSphere 6.0 cluster (8 ESXi hosts, 96 VMs) that consolidated 40 physical servers, reducing power consumption by $48,000 annually and freeing 12 rack units of data center space - Created automated account provisioning workflow in Active Directory using PowerShell and ServiceNow orchestration, processing 120 new-hire accounts per month with a 99.2% accuracy rate and 15-minute average completion time - Administered F5 BIG-IP load balancers handling 2 million daily HTTP requests across 24 web servers, tuning health monitors and persistence profiles to reduce session drops by 73%

Education

**Bachelor of Science in Computer Engineering** | University of Washington | Seattle, WA | June 2014 - Capstone Project: Designed high-availability server cluster with automated failover using Heartbeat/Pacemaker (received departmental honors)

Certifications

• **AWS Certified Solutions Architect -- Professional** -- Amazon Web Services, Issued February 2023
• **AWS Certified SysOps Administrator -- Associate** -- Amazon Web Services, Issued June 2021
• **Red Hat Certified Engineer (RHCE)** -- Red Hat, Inc., Issued November 2020
• **Red Hat Certified System Administrator (RHCSA)** -- Red Hat, Inc., Issued March 2018
• **Microsoft Certified: Azure Administrator Associate** (AZ-104) -- Microsoft, Issued January 2020
• **VMware Certified Professional -- Data Center Virtualization (VCP-DCV)** -- VMware by Broadcom, Issued September 2019
• **CompTIA Security+** -- CompTIA, Issued April 2016
• **ITIL 4 Managing Professional** -- PeopleCert / Axelos, Issued May 2022

ATS Keywords for Systems Administrator Resumes

Applicant Tracking Systems filter resumes by keyword match before a recruiter ever sees your application. Include these terms naturally throughout your experience bullets and skills section -- never dump them in white text or hidden formatting. **Infrastructure & OS:** Active Directory, Group Policy, Windows Server, Linux (RHEL, Ubuntu, CentOS), DNS, DHCP, TCP/IP, LDAP, file server, print server **Virtualization & Cloud:** VMware vSphere, ESXi, Hyper-V, AWS, Azure, EC2, S3, cloud migration, hybrid cloud, Infrastructure as a Service (IaaS) **Automation & DevOps:** Ansible, Terraform, Puppet, PowerShell, Bash scripting, Python, Infrastructure as Code (IaC), CI/CD, configuration management **Monitoring & Security:** Nagios, Datadog, Splunk, Prometheus, Grafana, disaster recovery, backup and recovery, incident response, vulnerability management, patch management, CIS Benchmarks, NIST, zero-trust **ITSM & Process:** ServiceNow, ITIL, Change Management, SLA management, capacity planning, documentation, root cause analysis, on-call rotation

Skills Breakdown

Hard Skills (Technical)