Most system admin resumes are just keyword dumps. Here's how to write bullets that prove you can actually do the job.
The Keyword Dump Problem: Why Your Resume Gets Auto-Rejected
Every system admin resume I see has 'Linux Administration, Active Directory, Bash Scripting, VMware' in the skills section. So what? That tells me nothing about whether you can actually use them. ATS systems in 2026 don't just count keywords—they look for context and impact.
BAD: 'Managed Linux servers and Active Directory.'
GOOD: 'Reduced Linux server provisioning time by 40% through automated Bash scripts, decreasing new hire onboarding from 3 days to 4 hours.'
The difference? One is a claim, the other is proof. If you can't quantify it, don't include it.
How to Write Bullets That Actually Work (With Examples)
For each key skill, you need one bullet that shows impact. Not 'responsible for,' but 'achieved X by doing Y.'
For Linux Administration:
BAD: 'Administered 50+ CentOS servers.'
GOOD: 'Automated patch deployment across 50 CentOS servers using Ansible, reducing monthly maintenance windows from 8 hours to 30 minutes with zero downtime.'
For Active Directory:
BAD: 'Managed AD user accounts and groups.'
GOOD: 'Streamlined AD group policy management for 500+ users, cutting password reset tickets by 60% through self-service portal implementation.'
For Virtualization (VMware):
BAD: 'Maintained VMware vSphere environment.'
GOOD: 'Optimized VMware cluster resource allocation, increasing VM density by 25% without additional hardware costs, saving $15K annually.'
Notice the pattern? Number + action + result.
The Achievement Formula: How to Structure Any Bullet
Use this template for every bullet point: [Action verb] + [What you did] + [How you did it] + [Quantifiable result].
Example from a real resume I loved: 'Revitalized the company's backup strategy by migrating from tape-based to cloud-based disaster recovery (AWS S3), reducing RTO from 48 hours to 2 hours and cutting annual costs by 30%.'
Breakdown:
- Action: Revitalized
- What: backup strategy
- How: migrating to AWS S3
- Result: 48h→2h RTO, 30% cost cut
This works for any skill—Bash scripting, monitoring, security hardening. If your bullet doesn't fit this formula, rewrite it.
Frequently Asked Questions
What if I don't have access to company metrics like cost savings?
Estimate based on industry standards or use percentages. 'Reduced server provisioning time by ~40%' is better than no number. Or focus on scale: 'Automated tasks for 200+ servers' shows impact even without dollar figures.
How do I handle buzzwords like 'cloud migration' that every resume has?
Be specific. Instead of 'Led cloud migration,' write 'Migrated 50 on-premise VMs to AWS over 6 months, achieving 99.9% uptime during cutover.' Name the cloud provider, count the VMs, state the timeline and success metric.