John Griffin-Wiesner

Experience

• 

  Genisys Software, Inc

  Sept 1996 - Jan 1998

  Engineer

  Built, configured, installed, and supported point-of-sale computer systems running SCO UNIX

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  City of St Paul

  Jan 1998 - Apr 1999

  Systems Analyst IV

  UNIX systems and network administrator. Main platform was Solaris 2.5 through Solaris 7 with IRIX and Linux

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  SGI

  Apr 1999 - Jan 2004

  Technical Support Engineer 3

  Provided OS and software support to SGI customers, most of them systems administrators, for IRIX and Linux focusing on network problems. Some of the main technical areas I supported were IRIX and Linux installation and upgrades, boot process, user environment configuration, file permissions, Sendmail, NFS, Samba, NIS, DNS, ssh, network security, network performance, Roboinst, FLEXlm, Gauntlet (firewall), TCP/IP configuration and routing, gigabit ethernet, ATM, and system crash dump analysis. As a TSE III, duties expanded to include helping IRIX engineers isolate software bugs, software testing, coaching and mentoring other TSEs, and providing technical training and leadership to coworkers. Wrote technical documents to populate customer solutions database. Tunjukkan kurang

• 

  Minnesota Supercomputing Institute

  Sept 2004 - Jan 2017

  HPC Systems Administrator

  Technical lead of a team of HPC admins for all MSI clusters, the largest of which were 1100 and 800 nodes and used by nearly 2000 users.Schedulers and resource managers: Torque, Moab, PBSPro, and SGE;Provisioning systems: xCAT, CMU, and Scali Manage; High performance storage: Lustre and Panasas;Automation with Puppet;Infiniband on most of the systems; Several MPIs: Intel MPI, Open MPI, and PMPI;Resource monitoring with Nagios, collectl, Splunk, and GangliaDuring my first year at MSI, as part of the infrastructure group, my main responsibilities were installing Redhat via Kickstart,software installation, which included building from source and building custom rpms, and managing software license servers. Tunjukkan kurang

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  Penguin Computing

  Jan 2017 - now

  HPC solution, and software-defined storage system build and delivery. I am involved in every phase of the system after the hardware is built and racked. This includes Linux installation, build and config of provisioning systems, high-performance networks, queuing systems, and other third-party software. Once the solution is on-site, I'm in charge of the physical installation, final cabling, hardware verification, and customer training.Technologies:Provisioning: Clusterware, xCAT, BrightNetworking: Infiniband, Omni-Path, CumulusStorage: BeeGFS, Ceph, Weka, PanasasScheduling: Slurm, Torque, PBSProAutomation with AnsibleNvidia DGX and Tesla Tunjukkan kurang

  • Professional Services Manager

    Jan 2021 - now

  • Sr. Professional Services Engineer

    Jan 2017 - now