Thom Maycroft
Senior SRE Manager at General Motors
London, England, United Kingdom
Summary
🤩
Rockstar
Top expert inCloud Infrastructure and Automation Engineering
Thom Maycroft is a seasoned Site Reliability and Platform leader with 17 years of experience building and operating large-scale, cloud-native infrastructure across companies from Chef to Apple and now General Motors. He has a strong track record of growing and stabilising SRE teams (scaling Traffic SRE at Apple from 5 to 15), dramatically reducing on-call noise, and introducing SLO-driven measurement to improve reliability and resource efficiency. Deeply technical and product-minded, Thom has contributed to widely used open-source tooling in the Chef ecosystem—improving system profiling, virtualization detection and client behavior—while also leading documentation and community engineering. He combines hands-on DevOps and automation expertise with managerial experience running distributed teams, onboarding acquisitions, and migrating platforms across multiple cloud providers. Based in London, he is notable for blending long-term OSS stewardship (Chef, Ohai) with pragmatic platform delivery in high-stakes production environments.
17 years of coding experience
23 years of employment as a software developer
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (25)
markdown10
oai10
testing10
rspec10
linux10
ruby10
chef-client10
automation10
markdown-it10
automation-testing10
virtualization10
apt10
chef-solo10
automations10
devops10
Programming languages (10)
Github contributions (5)
chef/ohai
Feb 2009 - May 2018
Ohai profiles your system and emits JSON
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:2 releases, 164 commits, 162 PRs in 9 years 5 months
Contributions summary:Thom primarily focused on enhancing the `Ohai` project by adding and improving the virtualization detection capabilities within the Linux platform. Their contributions included writing and modifying tests, specifically targeting virtualization platforms such as Xen, KVM, VMware, and Microsoft Virtual Machine. Furthermore, the user implemented and refined plugins for Python language detection and made adjustments to handle potential errors related to the FQDN setting within the hostname plugin. They also addressed a bug related to DMI data parsing.
configurationconfiguration-managementohaiemitsruby
sous-chefs/apt
Feb 2015 - Mar 2016
Development repository for the apt cookbook
Role in this project:DevOps Engineer
DevOps EngineerContributions:1 release, 38 commits, 38 PRs in 1 year
Contributions summary:Thom primarily focused on maintaining and improving the `apt` cookbook. Their commits include cleaning up tests related to LWRPs, implementing rubocop cleanup, and converting existing tests to serverspec. They also address quoting URLs and handle wildcard globs for preferences, ensuring the correct functioning of the apt package management system.
cookbookchef-resourcemanaged-by-terraformaptchef
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