I joined the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) in 2005. The project then was already in the middle of construction and primarily I worked on the pixel detector and getting that ready for data taking, which started in 2010. But already I was thinking about what we want to do in the future. So I got involved with the H luminosity LHC upgrade, the next major upgrade of the facility at CERN that will allow us to take data at a rate that is in order of magnitude higher than what we have been doing so far. Starting about 2014, we really started seriously to make the plans for this work which had been listed as the highest priority project for the LHC upgrades.