Mark Hender
Chief Technology Officer at Zellor
Kilkenny, Leinster, Ireland
Summary
👤
Senior🎓
Top SchoolMark Hender is a seasoned technology leader and current CTO at Zellor with 13 years of experience building resilient, cloud-native infrastructure and developer platforms. He has a strong background in DevOps and engineering management from roles at UKG and Pivotal, where he led migrations to orchestrators like Nomad, tightened CI/CD feedback loops, and scaled remote teams while adopting lean agile practices. Hands‑on earlier in his career he developed high-performance systems in Java and C++, and he has contributed to the popular Concourse CI project—adding templated pipeline output and automated Let's Encrypt TLS integration to improve usability and security. Based in Kilkenny, Ireland, he combines strategic vision with practical operational expertise, and is comfortable switching between executive planning and code-level improvements. Peers describe him as a pragmatic problem‑solver who brings observability-driven decisions and developer empathy to complex production challenges.
13 years of coding experience
11 years of employment as a software developer
Bachelor’s Degree Computer Science, Bachelor’s Degree Computer Science at Trinity College Dublin
German
Github Skills (15)
mtls10
go10
tls1210
continuous-delivery10
continuous-integration10
devops10
tls1310
cicd10
libtls10
concourse10
dockers9
acme9
docker9
kubernetes8
kubernetes-pods8
Programming languages (11)
Github contributions (5)
concourse/concourse
Jul 2018 - May 2019
Concourse is a container-based automation system written in Go.
Role in this project:
DevOps Engineer
DevOps EngineerContributions:5 commits, 1 PR, 4 comments in 10 months
Contributions summary:Mark primarily focused on enhancing the Concourse CI/CD system, with key contributions including adding a flag to output a templated pipeline and integrating Let's Encrypt for automated TLS certificate generation. The user also addressed minor issues, improving the overall functionality of the system. The changes demonstrate a focus on improving the usability and security of the concourse deployment.
golangcontainersdoergocdelm
henderjm/testing
Mar 2017 - Mar 2024
Contributions:16 releases, 6 pushes, 1 branch in 7 years 1 month
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