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Donald Sparish
Senior Linux/Unix Systems Engineer specializing in automation, SRE, and enterprise operations
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AIX/IBM Power Systems engineer with hands-on production performance troubleshooting (NMON) and operational administration across VIOS/HMC/LPAR/DLPAR. Has implemented enterprise patching and security remediation using NIM (e.g., OpenSSH vulnerability) and built automation to generate and curate weekly AIX images for the NIM environment.
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Key Strengths
- Resolved AIX production performance incident by adding memory, tuning Oracle cache to reduce swap, and optimizing drive layout
- Uses NMON to identify system bottlenecks during performance troubleshooting
- IBM Power provisioning experience using VIOS for storage/network and HMC for LPAR creation and storage assignment
- Enterprise patching execution using NIM to deploy OpenSSH security fixes across affected systems with scheduled reboots
- Built automation to create weekly AIX images and publish only successful builds into NIM
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