Jeremy Chalfant

jeremy.chalfant@protonmail.com

Me

Applications, Infrastructure, Cloud, and DevOps engineering with focus and expertise in automation for secure, consistent, accurate, and repeatable deployments.

Technologies Link to heading

Openshift, AWS, Redhat/SUSE/Debian Linux (including devirvatives), AIX, Windows, git, github, Active Directory, FreeIPA, Samba, MySQL/MariaDB, PostgreSQL, Oracle, Docker, Kubernetes, VMware, Jenkins, Chef, and Ansible

Languages Link to heading

Bash, Perl, Python, Ruby, PHP, and C

Experience Link to heading

Kansas Turnpike Authority - Senior Systems Administrator Link to heading

December 2024 - Present

  • 24x7 support for web hosting environment and business critical payment portal
  • Architecture and Security guidance and design for IT Infrastructure
  • Design and Support of Continuous Integration and Deployment systems
  • PCI and Security scanning, patching, and configuration of payment systems

Armis Inc — Senior DevOps Engineer Link to heading

July 2020 - September 2023

  • 24x7 DevOps on call rotation monitoring, support, and bug fixes for the Armis stack (nginx, PostgreSQL/RDS, Apache Kafka, RabbitMQ, and Docker) using Python, Terraform, github, and Jenkins.
  • Authored terraform AWS SSO deployments for AWS GovCloud environment, product bug fixes, and PostgreSQL performance tuning and monitoring
  • Kubernetes/AWS EKS cluster management and development of Helm based deployment packages for Sumo Logic, [Prometheus)(https://prometheus.io/) monitoring services, and Armis platform microservices
  • AWS EC2 AMI Packer with Ansible build automation for Red Hat Linux DoD STIG compliant EKS node EC2 instances

IBM - Server Systems Analyst, SmartCloud Enterprise Plus UNIX Infrastructure Lead, Cloud Automation Architect Link to heading

April 2010 - July 2020

  • Designed, developed, and implemented a Chef cookbook continuous integration and delivery pipeline using Jenkins, Github, Vagrant, ChefDK, and Chef Policyfiles
  • Design and development of dozens of Chef cookbooks for Linux and AIX managing software such as sudo, ntp, LVM, LDAP, SSSD, Samba, DNS, nginx, dnsmasq, Linux and Active Directory Authentication, CIS 2.0 compliance, and sshd running on thousands of global AIX LPARs and Linux virtual machines in support of multiple fortune 500 companies
  • Contributed AIX support for Chef’s InSpec testing and auditing software
  • Chef based Central SAP deployment automation for AIX and Linux and awarded an IBM Outstanding Innovation award
  • Driver and lead in DevOps practices adoption in CMS organization of IBM
  • Lead for a global team of over twenty AIX and Linux subject matter experts
  • Steady state support of over 2000 AIX LPARs and VIOs, IBM Power Servers, Linux virtual machines in twelve global data centers in seven different countries.
  • Installation of Power mainframes in multiple global data centers
  • Authored multiple system support, troubleshooting, and upgrade automation tools and scripts and tools
  • IT disaster recovery responder onsite at Spirit Aerosystems after the 2014 tornado. Assisted in bringing numerous Power frames and storage arrays online.
  • Steady State support of AIX and Linux systems hosting terabytes of CAD/CAM engineering data and data processing compute nodes
  • Secure migration of over 40 terabytes of CAD/CAM data from legacy systems to GPFS enabled HACMP NFS and Samba clusters
  • Migration of over 10,000 user accounts from legacy NIS to LDAP enabled Samba integrated systems
  • Last level support of enterprise batch-processing system, including development and support of customer designed and implemented web-based front-end
  • Support and management of customer’s WSSO solutions using IBM’s Tivoli Access Manager for e-Business (WebSeal), Active Directory, and IBM Edge Server for High availability and load-balancing

Spirit AeroSystems — Systems Design and Integration Specialist Link to heading

May 2006 - April 2010

  • Web architecture and design for various COTS software on the IBM WebSphere platform
  • Migration and upgrade of CA AutoSys system and supporting custom web-tools from HP-UX to AIX
  • Integration of AutoSys Batch processor with SAP
  • HP-UX to AIX port of in-house C Motif Oracle application using the GNU Autotools
  • Authored numerous shell and perl automation scripts used for numerous UNIX systems administration tasks
  • Maximo and WebSphere on AIX Application support and performance improvements

Education and Awards Link to heading