In 2010 Kohsuke founded InfraDNA, which merged with Cloudbees shortly after. In 2014 he become the CTO of Cloudbees.
You can learn more about Kohsuke on his website.
You can read more about Jenkins here.
You can read more about Cloudbees here.
Shout to Mossmyr for contributing a question that's now part of our CI/CD Collective: Is there a way to call a Jenkins Shared Library method from another Jenkins Shared Library?