Jason Hensley

Technical History

03 Oct 2024
introduction about resume contact

Jason Hensley

Principal DevOps Engineer

Experience

Principal DevOps Engineer, Dell Technologies | July 2019 – Current

  • Drove the development and implementation of on-premises hybrid Kubernetes clusters, creating a secure environment for sensitive CI/CD pipelines.
  • Led the DevOps team for the Dell Web Services platform, scaling services to support multi-regional operations.
  • Provided insightful cost-analysis and optimization strategies. Enhanced infrastructure stability through proactive monitoring, anomaly detection, and service hotfix implementation tracked through Infrastructure-as-Code (IaC).
  • Designed scalable solutions to complex problems, improving the stability and efficiency of CI/CD build systems.
  • Served on the Architecture Review Committee to evaluate and recommend tooling and solutions.
  • Automated hybrid Kubernetes clusters, reducing cloud costs by 40%.
  • Decreased build pipeline failures across the organization by 70%.
  • Developed and implemented Incident Management/Response process, widely adopted by the team.

Senior Systems Engineer, Armor Cloud Security | May 2016 – July 2019

  • Performed deep-level troubleshooting and analysis on complex systems to resolve critical customer infrastructure issues.
  • Consulted on architecture and engineering designs for enterprise environments, ensuring optimal performance and security.
  • Authored and maintained comprehensive runbooks and network diagrams for over 40 enterprise customer environments.
  • Conducted root cause analyses on service outages, delivering clear, documented solutions to prevent recurrence.
  • Collaborated with security teams to mitigate active attacks and manage the hand -off of compromised systems, maintaining robust security posture.
  • Created automated live test environment for interview candidates, streamlining the hiring process and improving assessment accuracy.
  • Identified and mitigated security risks, enhancing the protection of customer environments against active threats.
  • Increased system reliability and efficiency by developing automation tools tailored to operational needs.
  • Provided expert advice on enterprise system designs, ensuring architectural integrity and scalability.
  • Authored detailed documentation and network diagrams, improving clarity and support for enterprise customer infrastructure.

Unix/Linux Systems Administrator, XO Communications | Sep 2013 – May 2016

  • Implemented migration of critical legacy applications to cutting-edge hardware, enhancing system efficiency and reducing technical debt.
  • Spearheaded cost-saving initiatives to consolidate hardware systems and transition to Solaris Zones/VMware environments, contributing to significant reduction in carbon footprint.
  • Directed upgrades of Citrix NetScaler appliances and established automated remote backup system, bolstering infrastructure resilience.
  • Conducted in-depth troubleshooting and problem resolution on complex systems, minimizing downtime and enhancing user satisfaction.
  • Participated in on-call rotations, proactively addressing issues and refining processes to prevent recurrence.
  • Maintained comprehensive documentation, including runbooks and network diagrams, for all environments.
  • Collaborated with developers and vendors to ensure successful deployment and ongoing maintenance of application environments.
  • Successfully led initiative to migrate critical legacy applications, reducing technical debt by 60%.
  • Upgraded over 20 Citrix NetScaler hardware appliances, enhancing load balancing capabilities and system reliability.
  • Created automated remote backup solution, ensuring data integrity and quick recovery in case of system failures.
  • Achieved 45% reduction in carbon footprint through strategic consolidation of hardware systems into Solaris Zones/VMware environments.
  • Facilitated the successful deployment and maintenance of more than 100 application environments, demonstrating strong collaboration with developers and vendors.

Projects

On-premises Kubernetes Automation | November 2019 - Present

  • Created automation for running hybrid OS Kubernetes clusters (Windows/Linux) on-premises.
  • Helped to identify & fix bugs upstream, contributing to open source.
  • Created an environment within company network to run CI/CD builds with sensitive stages, such as code signing within secure network.
  • Environment deployed through CI/CD pipeline, using automation and shared jenkins libraries.
  • Created Incident Management process called SWARM that was effectively adopted

Education & Certifications

  • Certified Kubernetes Administrator
  • VMWare Certified Professional 6.5
  • ITIL Foundation Certificate in IT Service Management
  • Linux Security and Hardening Essential Training (CompTIA Authorized Partner - LinkedIn)
  • AWS Cloud Practitioner
  • RH134 - Red Hat Systems Administration II
  • RH254 - Red Hat Systems Administration III
  • RH236 - Red Hat Gluster Storage Administration
  • RH413 - Red Hat Server Hardening
  • RH436 - Red Hat High Availability Clustering
  • RH422 - Red Hat Enterprise Performance Tuning

Technical Proficiency

Core DevOps Skills: Bare Metal Kubernetes, Helm, Docker, ContainerD, Terraform, Packer, AWS CloudFormation, Security Scanning, Istio, Knative, ArgoCD, Quarkus, MetalLB, Rancher, RKE2, AKS, EKS, Velero, NGINX, WireGuard, KeyCloak, Linux, Unix

Programming & Scripting: Bash/Shell, Powershell, Groovy & Python, Infrastructure as Code

Cloud: VMWare, AWS, Azure, KVM

CI/CD: Jenkins, GitHub Actions, GitLab CI, Tekton

Cross-functional Skills: Infrastructure monitoring, Virtualization, Automation, Cost Optimization, Contribute to Open Source

Problem Solving: Troubleshooting, Debugging, Observability, Performance Tuning, Research & Analysis, Decision Making, Incident Response