Linux System Administrator, supporting DevSecOps culture and practices. I believe in technology solutions that are easy to use and sustainable over time.
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• Operating Systems: Linux (Debian and Red Hat based distributions), Unix (HP-UX), VMware, Windows (2000, 2003, 2008)
• Scripting/Languages: Python, Bash, HTML, CSS, PHP, SQL
• Configuration Management: Ansible, Puppet, Bcfg2
• Provisioning: Terraform (HCL)
• Python Programming, NYU School of Professional Studies, Oct 2014 - Dec 2014
• Red Hat Certified System Administrator (RHCSA), Red Hat Inc., ID # 120-105-390, Jun 2012
2U, Inc. | New York, NY
Senior Devops Engineer | May 2019-Current
• Completed migration of OARS application from EC2 public cloud to VPC
• Researched migration of existing SFTP EC2 servers to AWS Transfer for SFTP service
• Helped onboard new team members
• Started the Terraform 0.12 upgrade effort
TouchAppMedia | Bucharest, Romania
Senior IT Operations Engineer (Client 2U, Inc., New York, NY - 100% remote) | Nov 2015-May 2019
• Set up Ansible configuration management using roles, to replace Puppet
• Migrated AWS resources from public cloud to AWS VPC, to increase security
• Researched and implemented backup solution for MongoDB databases using Python and Jenkins
• Led the effort to upgrade MongoDB databases to the latest version
• Improved security by testing and updating Puppet code for new Ubuntu distributions
• Implemented AWS Database Migration Service using Terraform for 30+ RDS instances
• Configured continuous integration for Terraform with pull request testing job
• Contributed to Open Source projects
• Set up Node.js Lambda to notify Slack on AWS EC2 maintenance events, using Terraform
CloudAware | Bucharest, Romania
Senior IT Operations Engineer (Client 2U, Inc., New York, NY - 100% remote) | Apr 2015-Oct 2015
• Improved the Puppet codebase by fixing deprecated code in preparation for a major version upgrade
• Migrated memory intensive ETL application to optimized hardware, reducing infrastructure cost
• Tuned Puppet master Passenger settings to enhance performance and stability
2U, Inc. | New York, NY
Senior IT Operations Engineer | Aug 2014-Apr 2015
• Administered AWS cloud infrastructure of 500+ Ubuntu instances
• Automated Puppet code deployments and set up validation testing on pull requests using Jenkins
• Implemented Librarian-Puppet for module management and the Hiera eyaml key/value lookup tool, to separate data from code
• Set up cloud-init for instance initialization and auto-signing of Puppet certificate requests, to automate provisioning
• Played a vital role in multi-tenant migration project, ensuring that Puppet can smoothly accommodate new configurations
• Greatly improved the Puppet codebase by fixing validation, lint and deprecation errors, simplifying syntax and cleaning up unused code
Rent The Runway | New York, NY
System Engineer | Jan 2013-Aug 2014
• Administered 300+ CentOS and RedHat servers in Rackspace Cloud
• Implemented configuration management with Puppet and MCollective for orchestration
• Scaled the Continuous Integration infrastructure with distributed Jenkins and Selenium Grid
• Set up flexible and controlled development environments with Vagrant
• Provisioned centralized logging using rsyslog, Logstash, Elasticsearch and Kibana
• Application and system monitoring with Graphite, Nagios and PagerDuty integration
• Researched, tested and implemented load balanced RabbitMQ cluster with high availability mirrored queues
• Tightened systems security
Wireless Generation | New York, NY
Linux System Administrator | May 2011–Dec 2012
• Administered 1000+ CentOS servers for multiple application platforms
• Configuration management with Bcfg2 and Genshi templating
• Change management with the Git revision control system and Gerrit code review
• Experience with Git branching strategies and continuous integration with Jenkins
• Experienced in system and application release deployments
• Designed and provisioned new environments in AWS
• Infrastructure monitoring and metrics with Nagios, Ganglia, and Splunk
• Design and implementation of DNS platform
• Automated system provisioning using kickstart, Cobbler, and Pulp utilities
• Scripted backup operations with Bash and Ruby
• Mentored new Unix team members