September 2015 to September 2022
Lead Systems Administrator

I administered our CentOS 7 environments that power the company's product, mostly running Ruby on Rails with nginx, PostgreSQL databases, on multiple AWS accounts.  I used bash and python for automation, Terraform to provision and maintain our various AWS resources, Puppet and Ansible for configuration management, and Datadog for APM and alerting.  I was in the middle of a project to move our stack to Kubernetes.  I also administered our Palo Alto Networks and Fortinet firewalls for multiple offices.  Finally, i managed our Desktop Support team.

November 2014 to September 2015
Linux Systems Administrator

I was one of the front-line members of the C3 Support team, administering the OpenStack environment, automating common administrative tasks, updating the Puppet configuration, and training new contractors; we also drove user support for PayPal during in the eBay/PayPal cloud separation, ensuring that their data and compute were migrated, and that they received the resources they needed in the new environment.

May 2013 to June 2014
Senior Technical Support Engineer

As a member of the customer support team for MapR's Hadoop ecosystem software suite (which runs on Red Hat, CentOS, Ubuntu, Windows, and OS X), i handled customer queries and outages, including troubleshooting the software, OS, and architecture installations.

June 2011 to May 2013
Systems Administrator 3

I was the lead systems engineer for various shopping.com development teams, including search, consumer sites, and publisher; i provided support for developers, wrote and improved homebrewed deployment & Nagios monitoring scripts.  I was also the lead systems engineer for the shopping.com/eBay search integration project; during that time, i set up a proof-of-concept Hadoop/HBase/Zookeeper/Oozie cluster for search index generation and also acted as project manager.

October 2009 to May 2011
Senior Systems Administrator

I administered every production environment (CentOS 3, 4, 5; AIX 5.3), including deployment of new production code, process improvement, and documentation.

October 2008 to June 2009
Senior Systems Administrator

I was lead administrator for the File Transfer Fabric environment, including provisioning automation (kickstart, RPM, Bourne shell scripts) and documentation.  I was one of the principals in a data center move and infrastructure redesign and upgrade project (doubling the amount of production servers, redesigning namespace, defining new VLAN roles and separation).  I also set up monitoring with GroundWork, and also served as postmaster and hostmaster (postfix and BIND).

February 2008 to September 2008
Lead Systems Administrator

I built the new QA environment on IBM hardware and CentOS 5.1, cleaned up and streamlined the systems infrastructure, helped migrate the data center, mentored junior team members, and created, implemented, and documented administration procedures.

June 2006 to October 2007
Senior Systems Administrator

Our small team built a new data center for the new version of the Visible Path application platform; this included setting up provisioning for Solaris and SuSE Linux hosts, configuring and administering Foundry core switches, Juniper firewalls, and F5 load balancers.  The software we used included Resin as our Java container server, Oracle database, Perforce, Jira, Sitescope, and MediaWiki.  I also traveled to the Bangalore office to set up their network and system devices.

January 2000 to February 2006
Senior Systems Administrator

• Participated in hot cutover in public-facing Web farm, online store, and financial systems between colocation facilities.
• Hardware and OS deployment and maintenance for 150 Sun hosts, running Solaris 2.6, 8, 9, and 10, and 200 HP hosts, running Red Hat Enterprise Linux 3 and Windows 2000 and 2003
• Administered F5 BIG-IP load balancer
• Set up Veritas Cluster installation
• Automated deployment of new servers via Jumpstart (Solaris) and Kickstart (Red Hat Linux)
• Installation and maintenance of third-party software packages (GNU tools, INN, Apache, jakarta-tomcat, MySQL, JDK)
• LDAP integration of Microsoft Active Directory on Linux and Solaris hosts via Centrify DirectControl
• Postmaster duties (sendmail 8.x), 2000-2003
• Hostmaster duties (BIND 8.x, 9.x), 2000-2004
• Automation via Bourne shell scripts
• Responsible for documentation of processes and training of junior sysadmins

Education:

• University of Southern California, Computer Science major, Sep 1990 - May 1993
• Fluent in Spanish (speaking, reading & writing)

Memberships:

• USENIX & LISA (formerly SAGE)