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Allan Mejia

Senior AIX/Unix Server Engineer specializing in IBM Power, AIX, and enterprise security

Blue Cross Blue Shield AssociationMorton CollegeNew Lenox, IL31 Years ExperienceSenior Level

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About

AIX/IBM Power veteran (30 years) with hands-on experience across the full stack—hardware installs, HMC/vHMC, VIOS, LPAR/DLPAR, NIM, and PowerHA fundamentals. Led SEV1 performance incidents (including Ethernet adapter tuning) and helped re-platform a large AIX estate to AWS (77 servers to ~120 EC2s) with extensive pre-cutover testing and operational automation (mksysb + sudo provisioning).

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Key Strengths

  • Led SEV1 incident troubleshooting on AIX with IBM support and network team; resolved post-switch-upgrade slowness via adapter tuning and reboot
  • Deep IBM Power/AIX operations experience (30 years) spanning rack/stack through LPAR/DLPAR/VIOS/vHMC and NIM setup
  • Resource/right-sizing using monitoring data (nmon, topas, Patrol) to reallocate CPU/memory across LPARs without disruption
  • Executed AIX-to-AWS re-platform migration (77 AIX servers to ~120 EC2 instances) with 6+ months of testing and structured status tracking
  • Built automation for recurring mksysb backups to NIM and scripted sudo access provisioning across many servers

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Experience

Senior AIX/Unix Server EngineerBlue Cross Blue Shield Association · May 2007 – Present
Senior AIX/Unix Server EngineerZurich Financial Services · Dec 2004 – May 2007
AIX ConsultantMascon IT Services · Aug 2003 – Jun 2004freelance
Senior AIX, Solaris and Linux AdministratorTEK Systems / Mascon IT / IBM Global Services · Apr 1995 – Jun 2003

Awards

  • Disaster Responder - American Red Cross

Skills

UnixAWSTroubleshootingHigh availabilityDocumentationAmazon EC2AIXIBM Power SystemsIBM POWER (hardware/platform)LPARsVIOS (Virtual I/O Server)NIM (Network Installation Manager)Red Hat Enterprise Linux (RHEL)RHEL 7RHEL 8

Languages

English

Certifications

AWS Certified Cloud PractitionerAWS Certified AI PractitionerCriminal Justice - Morton College

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Typically responds within 24 hours

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Allan MejiaSenior AIX/Unix Server Engineer specializing in IBM Power, AIX, and enterprise security