People who know how to manage Ubuntu [ubuntu.com] systems and would like to be able to prove this with official credentials can now get certified [distrowatch.com] through Canonical Academy.
"With Canonical Academy, successful candidates receive verifiable digital badges that demonstrate open source competence. Backed by Canonical, these credentials provide credible evidence of technical ability in a competitive job market."
Additional information on the courses offered can be found in this blog post [ubuntu.com].