Zachary Armstrong
Senior Linux/DevOps Systems Administrator
a:a: Denver, Colorado, USA

Technical Skills

Linux: RedHat/CentOS, Amazon Linux; Windows: 2000 - 2016; Mac OS X
TCP/IP, Load balancing, Cisco administration, nmap, HTTP, SSL, SSH, DNS, SMTP, POP3, IMAP, FTP, DHCP, NFS, SMB, SNMP, IPMI, Active Directory
AWS: EC2, RDS, Route53, S3, CloudFront, VPC & more; Apache, Ansible, Puppet, Nagios, MySQL, Memcached, Passenger, Cacti, Loggly, New Relic, proftpd, OpenSSH, Courier, Exim, BIND, ActiveBatch, WordPress, HAproxy, Oracle, Microsoft SQL Server
Bash, Perl, PHP, HTML4.01, CSS, JavaScript, jQuery, Bootstrap, AJAX, Powershell, Visual Basic, Ruby, subversion, git, Java, Python

Professional Experience

Principal DevOps Engineer
November 2016 - Current
JobcaseJobcase, Cambridge, MA
A "people-first" social platform – built to help you improve and manage your work-lifeA "people-first" social platform – built to help you improve and manage your work-life
  • Responsible for the day-to-day operations of all Jobcase properties, including over 600 EC2 instances, 150 RDS instances, hundreds of domain properties.
  • Architected CMS system, leveraging WordPress deployed to S3/CloudFront, eliminating the risk of exposing WordPress to the internet.
  • Mentored and trained junior DevOps engineers
  • More to come...
Senior Application Operation Engineer
May 2015 - November 2016
VeracodeVeracode, Burlington, MA
On-Demand Application Security Testing and Code Review PlatformOn-Demand Application Security Testing and Code Review Platform
  • Responsible for the launch, management, and deployment of new microservice-based architecture.
  • Codeveloped Java-based deployment applications for artifact deployment to development, QA, and production environments.
  • Provided customer support with fixes for client scan data in Oracle. This includes reverting incorrect flaw mitigations due to end-user error, data correction due to software bugs, and more.
  • Developed deployment workflows in ActiveBatch utilizing Java, bash, Python, and PowerShell.
  • Modernized legacy platform monitoring applications from Windows command prompt to Java, increasing the speed of monitoring by a factor of 20 to 30.
Senior Linux Engineer
September 2013 - March 2015
TrackViaTrackVia, Denver, CO
Workflow management SaaS productWorkflow management SaaS product
  • Responsible for:
    • Three legacy product "Trackvia Classic" environments, two in AWS, one in a local datacenter.
    • Launch and maintenance of the new Trackvia product across five environments, one production, four pre-production.
  • Lead migration from physical to HIPAA compliant private cloud AWS environment for "Trackvia Classic" for our largest healthcare customer.
  • Implemented and maintained puppet configuration management across two divergent service offerings (legacy and current generation) spanning several environments in the AWS cloud.
  • Developed AWS Cloud Init scripts to automate deployment of new AWS instances for various server types.
  • Created internal tools for customer account management leveraging multi-factor authentication (Duo Security).
  • Managed and maintained ongoing changes to configuration in Puppet.
  • Acted as interim DBA for nine months; notable projects include: database split/migration, MySQL clustering (Percona Cluster).
  • Worked closely with the new DBA to develop automation, scaling and configuration management for MySQL Cluster, as well as standard master/slave MySQL segments.
  • Developed custom monitoring for Zabbix and Icinga, managed via Puppet, for both "Trackvia Classic" and current generation environments.
Senior Linux/DevOps Engineer
February 2013 - August 2013
Rue La LaRue La La, Boston, MA
Members-only boutique brand flash sale websiteMembers-only boutique brand flash sale website
  • Administered large scale server environments consisting of over 800 RHEL5/6 VMWare VMs running multiple technologies including apache, jboss, memcache, MySQL, postfix, ActiveMQ, python.
  • Packaged Rue code in RPM format and developed automation scripting in Bash and Perl.
  • Designed and implemented Puppet to configure, install, manage, and deploy releases across all environments.
  • Managed and maintained ongoing changes to configuration in Puppet.
  • Performed deployments to QA and performance environments.
  • Provided timely support as needed to staging and production releases.
  • Configured, performed troubleshooting and tuning for all layers of the stack.
  • Created and implemented custom Nagios monitoring and managed with Puppet.
  • Developed production web and application service monitoring dashboards leveraging PHP (AJAX, jQuery, Bootstrap), helping to identify bottlenecks and improve reliability.
  • Developed release engineer dashboards to monitor release versions across the various environments.
  • Administered Yum and subversion repositories.
  • Recipient of multiple "Reward and Recognition" awards for creating quick and elegant solutions during emergency situations.
Linux Systems Administrator and Release Engineer
April 2011 - January 2013
Rue La LaRue La La, Boston, MA
Members-only boutique brand flash sale websiteMembers-only boutique brand flash sale website
  • Responsible for providing 99.999% availability in an environment of high throughput sales with concurrent requests per second in the thousands.
  • Provided systems administration, monitoring, maintenance, deployments, troubleshooting and automation services.
  • Linux Systems Administration, virtual server maintenance, troubleshooting and creation.
  • Primary Linux engineer in the cut-over from bare metal infrastructure to PCI-compliant virtual environment.
  • Analysed multiple configuration management tools (chef, puppet, cfengine) and became sole implementer for puppet.
  • Re-engineered the release process from manual, proprietary system which delivered compressed archives to an industry standard continuous integration product (Bamboo) delivering RPMs.
  • Provided timely and thorough responses for off-hours problems during on-call shifts.
  • Acted as Tier 2 escalation point for other on-call engineers and the IT Help Desk.
  • Key Linux Engineer for Warehouse Management System overhaul, traveling to Kentucky to provision the new systems and provided on-site support during integration and cut-over.
  • Supported and improved custom imaging system and associated server farms.
Systems Engineer
October 2007 - April 2011
BullhornBullhorn, Boston, MA
SaaS recruiting/applicant tracking systemSaaS recruiting/applicant tracking system
  • Responsible for day to day monitoring and maintenance of production servers in an environment with 15 million daily transactions, 5 million+ daily email volume, global customer base of over 15,000 users.
  • Administrated mid-scale (more than 250) Linux (Redhat, CentOS, Fedora) and Windows (2000, 2003) servers.
  • Supported SaaS model product leveraging Windows 2003/2008, Linux, JBoss, MSSQL Server (2003, 2005), JRun, MySQL, and IIS.
  • Lead architect for ESXi virtualization project, including production server conversions, QA environment and Disaster Recovery environment.
  • Built and maintained the QA environments.
  • Implemented fault-tolerant infrastructure for production environment and DR site.
  • Primary Linux engineer, developed Bash, Perl, PHP scripts to maintain systems.
  • Developed tools for day-to-day tasks, maintenance operations and system integrity.
  • Worked in cooperation with Customer Support in troubleshooting customer issues.
  • Developed custom tools utilizing Barracuda API, Drupal API.
  • Train new hires in roles of Systems Engineers and Desktop Support Engineers.
  • Provided timely and thorough responses for off-hours problems during on-call shifts.
  • Server management, assembly, debugging, stress testing, monitoring, troubleshooting and high level technical support.
  • Network administration using Cisco PIX appliances.
Desktop Support Engineer
April 2007 - October 2007
BullhornBullhorn, Boston, MA
SaaS recruiting/applicant tracking systemSaaS recruiting/applicant tracking system
  • Supported 150+ remote and local users on a variety of desktop and laptop computers employing Windows XP & 2003, the Bullhorn SaaS application, SQL Server, Microsoft Great Plains.
  • Developed Visual Basic and ActiveX applications to:
    • Configure browsers for customer-base of over 16,000 users.
    • Automate new user PC provisioning.
  • Implemented and maintained internal network infrastructure, Avaya IP Office phone system, access card security system.
June 2006 - March 2007
Zachary Armstrong IT Consulting Services
  • Provided:
    • PC and Mac troubleshooting.
    • Home office network installation and support.
    • Hardware and software purchase advising and installation.
    • Website development and hosting.
Systems Operator Internship
July 2004 - August 2004
Securities Industry Automation CorporationSecurities Industry Automation Corporation, New York, New York
  • Coordinated computer operations ensuring efficient communication and data integrity between stock exchanges. Notable exchanges include the American Stock Exchange, New York Stock Exchange and NASDAQ
  • Analyzed and developed scripts to enhance and ensure accuracy in daily operating procedures.


Bachelor of Science in Information Technology
September 2002 - November 2006
Rochester Institute of Technology, Rochester, NY
An Introduction to Interactive Programming in Python (Part 1)
July 13, 2015
Rice University on Coursera [View Certificate]
Details regarding older work experience are available at