Joel Hacker Email & Phone Number

Newark, California, US

• Designed and built a modular installation script for the bringup of the Aclectic software stack.
• Collaborated with the Intel DAOS and SDP Cloud Teams to create test builds from source of DAOS on both release and pre-release Intel SDP server systems.
• Created custom Spack packages using Python for all the open source and custom Aclectic software.
• Traced through the DAOS scons based build system to understand the entire DAOS build process in preparation for automation through Spack.
• Set up a build environment involving both "standard" Spack Binary Mirrors (E4S) and custom Aclectic Spack Binary Mirror for precompiled Spack binaries.
• Managed multiple Linux distros on Microsoft WSL2 and podman containers.

San Jose, CA, US

• Designed improvements to a backend for BroadSoft PacketSmart - 4 Billion inodes - 80k Internet Connections at any time (GLB with DNS A records) - 800 Million files total storage with 200 Million new files per week
• Demonstrated Percona Toolkit to rebuild innodb databases and prescribed a monthly maintenance schedule.
• Implemented and helped maintain monitoring for 2,800 servers.
• Assisted the principal systems engineer in administering 30PB of EMC storage across 5 datacenters.NOTE: Position was closed after Mass Layoff

• Yahoo! Systems Administrator - Small Business Services (Hosting)
• Supported 20 million websites with 7,000 servers (in Load Balanced Clusters) across 14 datacenters.
• Audited web hosting accounts to screen for old links in an effort to phase out geocities.com.
• Monitored servers for load to help mitigate online attacks, and internal abuses of hosting agreement.
• Installed systems using Yahoo!'s internal package management, configuration management, and SW deployment tools.- Yahoo! Systems Administrator - Cloud Computing Group (Distributed Hash Table Database)
• Supported Fantasy Football, Global Signin (login), and Yahoo! Questions & Answers groups as they migrated their data off of MySQL shards onto Yahoo!'s internal version of Cassandra (DHT Database named Sherpa).

Campbell, CA, US

• Maintained 900+ servers across three datacenters to support production applications for almost 20K Telco (VOIP) customers.
• Reduced operational costs by advising engineers on newer hardware capabilities to help consolidate the number of servers required for production hosting.
• Assisted management in renegotiating hardware support criteria with Dell support to save the vendor relationship.
• Maintained 7 different open source and internally written monitoring systems for the entire production network.

Sunnyvale, CA, US

• Maintained 830+ servers for dev and production to support production services in a startup environment.
• Improved Application reliability by pushing for HA/Failover technologies
• Discovered and fixed an LDAP dependency (in PAM configs) in production apps which increased throughput tenfold (10x).
• Modified Nagios plugins and implemented self-healing solutions for fewer false/insignificant alarms.
• Assisted in Administering Hadoop and Katta for storage and map-reduce of key customer data.

Fremont, CA, US

• Reduced operations costs by 80% by consolidating hardware and implementing XEN Virtualization and VTP Trunking for 120+ servers across 40 hardware platforms.
• Added 200% more visibility to production systems for by implementing Nagios, Cacti, and MRTG.
• Created a disaster recovery plan, including a weekly backup solution by implementing SystemImager (which automatically built kickstart images and exported NFS images of all servers for quick rebuilds).

Chantilly, VA, US

Linux administration on Cray XT3 and X1E systems.

Chicago, Illinois, US

Software Testing and Systems Administration and eventually Lab Oversight.

Chicago, Illinois, US

I tested Communications software for Motorola's Cellular Infrastructure.

I worked three years during the summer breaks building high speed microwave radar chassis and working with microwave and electronics engineers.