System Administrator Cover Letter Example

I administer a hybrid estate of 340 servers across two data centers and Azure at Granite Peak Manufacturing, supporting 2,200 users at four plant sites, and the number I'm proudest of isn't uptime, it's zero exploited CVEs since 2020 on a fixed monthly patch cycle. I'm applying to [Company name] because that kind of unglamorous discipline is what actually keeps a plant running.

Leading our 2023 ransomware recovery, I restored full plant operations from immutable backups within a 4-hour RTO and rebuilt 60 compromised endpoints in one weekend, with no ransom paid and no lost production data. Separately, migrating 55 workloads to Azure with hybrid identity cut our data center power and hardware refresh costs by $95,000 a year.

I run monthly patch cycles with WSUS and Ansible across the full fleet, holding 98% compliance within 14 days of release, and I direct quarterly disaster recovery drills that cut our full-failover time from six hours to ninety minutes over eight test cycles. I hold Azure Administrator Associate, RHCSA and Security+ certifications.

I'd welcome a conversation about the resilience and patch-compliance goals behind [Company name]'s infrastructure and where ten years of exactly that kind of discipline could help. I'm available for an interview at your convenience. Thank you for considering my application.