Quintin Coetzee developed and refined onboarding documentation for the open-energy-transition/handbook repository, focusing on streamlining the new-hire experience and improving resource accessibility. Over two months, he consolidated onboarding materials into a dedicated Markdown document and handbook page, clarifying Cal.com scheduling integration and providing comprehensive guidance on internal tools such as Discord and ZIB HPC services. His technical writing and documentation skills ensured that updates were clear, consistent, and easy to navigate, reducing onboarding friction and supporting faster ramp-up for new team members. The work demonstrated depth in process understanding and addressed cross-team alignment without introducing or fixing code-level bugs.