Joseph Callen
Partner Systems Engineer at Red Hat
Paw Paw, Michigan, United States
Summary
🤩
Rockstar🎓
Top SchoolJoseph Callen is a Partner Systems Engineer with 12 years of hands-on experience designing, automating, and supporting complex virtualization and cloud infrastructures. Based in Paw Paw, Michigan, he blends deep VMware and infrastructure automation expertise with current work developing Ansible modules in Python and contributions to OpenShift projects that required modifying Go for installer and vSphere IPI support. His open-source track record includes meaningful changes to high-profile repos like openshift/installer and ansible/ansible, adding proxy, trust-bundle, and vSphere automation features that bridge installer, operator, and release tooling. A pragmatic engineer who moves between backend code, CI/CD pipelines, and infrastructure manifests, he has a history of turning manual platform tasks into repeatable, audited automation. Always learning, he’s actively expanding into Go while continuing to deliver production-ready automation for complex hybrid and cloud-native environments.
11 years of coding experience
12 years of employment as a software developer
Bachelors, Computer Science - Theory and Analysis, Bachelors, Computer Science - Theory and Analysis at Western Michigan University
Stackoverflow
1reputation
0reached
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Github Skills (38)
kubernetes10
vsphere10
docker10
system-configuration10
python10
server-configuration10
cloud-infrastructure10
vmware10
vmware-workstation10
dockers10
terraform10
vmware-tools10
cicd10
networking10
terraformer10
Programming languages (17)
Github contributions (5)
openshift/machine-config-operator
Jan 2020 - Dec 2021
Role in this project:
Cloud Engineer / Infrastructure Engineer
Cloud Engineer / Infrastructure EngineerContributions:16 reviews, 25 commits, 24 PRs in 1 year 11 months
Contributions summary:Joseph primarily focused on enhancing the machine-config-operator's capabilities related to vSphere infrastructure. Their contributions involved adding vSphere IPI support, which included the creation of manifests, templates, and modifications to the bootstrap process. They updated existing templates and manifests for bug fixes and compatibility across different vSphere IPI/UPI scenarios. The user also addressed issues like a nil `PlatformStatus.VSphere` case and removing DNS VIP from the configuration.
openshift/installer
Mar 2019 - Nov 2022
Install an OpenShift 4.x cluster
Role in this project:Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:111 reviews, 89 commits, 141 PRs in 3 years 8 months
Contributions summary:Joseph primarily focused on enhancing the OpenShift installer, specifically related to proxy configuration and integration. Their contributions involved modifying Go code to include proxy settings in the bootstrap node configuration, updating manifests, and adding templates for proxy-related configurations. They also addressed cloud provider metadata inclusion for the "no proxy" list and added support for additional trust bundles, which included modifying the installation configuration and adding related validation tests. Furthermore, the user contributed to the addition of features supporting vSphere IPI, involving changes to terraform variables, and adding destruction capabilities.
gcpvmsansiblelibvirtopenshift
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