John Calabrese
Engineering Manager, Infrastructure at CrowdStrike
New York, New York, United States
Summary
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RockstarJohn Calabrese is an engineering manager focused on infrastructure with 12 years of experience building and scaling cloud-native teams and systems from startups to Google Cloud and CrowdStrike. A practitioner of Agile/XP and Lean Startup, he blends hands-on DevOps and backend work with leadership—shipping infrastructure automation, CI/CD pipelines, and configuration tooling. His open-source contributions include improvements to conftest (Open Policy Agent) parsing and memory fixes, reflecting deep familiarity with policy-as-code and config validation at scale. He’s led platform and TPM efforts at Google Cloud and directed Pivotal Labs teams, consistently turning experimentation into customer-centric outcomes. Based in New York, he brings a bias for pushing technical boundaries while mentoring teams to deliver reliable, observable infrastructure.
12 years of coding experience
20 years of employment as a software developer
Github Skills (17)
bash10
terraform10
cicd10
terraformer10
go10
yaml10
testing9
azure8
aws8
gcp8
microsoft-azure8
command-line7
command-line-interface7
cli7
docker6
Programming languages (9)
Github contributions (5)
vmware-archive/pcf-pipelines
Jan 2017 - Jul 2017
PCF Pipelines
Role in this project:
DevOps Engineer
DevOps EngineerContributions:1 release, 216 commits, 8 PRs in 6 months
Contributions summary:John primarily focused on configuring and automating the deployment of PCF (Pivotal Cloud Foundry) pipelines using tools like OM (Ops Manager) and Terraform. Their contributions include developing tasks for uploading products, staging products, applying changes, and managing stemcells. Furthermore, the user integrated BOSH.io stemcell downloads and incorporated CI/CD bootstrapping, showcasing a strong focus on infrastructure-as-code and automation within the PCF environment.
pipelinescloud-foundryconcoursepcf
open-policy-agent/conftest
Jul 2019 - Aug 2019
Write tests against structured configuration data using the Open Policy Agent Rego query language
Role in this project:Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:8 commits, 6 PRs, 2 pushes in 28 days
Contributions summary:John primarily contributed to the project by implementing and improving the codebase related to parsing configuration files, specifically focusing on Terraform and YAML formats. They added support for parsing multi-document YAML files, updated the Terraform parser to use byte arrays, and refactored the parsing tests. Additionally, they worked on integrating command-line flags, improving the test suite, and addressing memory leaks.
open-policy-agentquery-languagekubernetestestingrego
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