The largest version move I have done: seventy sites at once
Imerys is a French industrial minerals group — €3.6bn revenue, listed in Paris, present in more than 40 countries. Its websites, around seventy of them — one per country, per division, per project — were all sitting on the same ageing Drupal, each needing its own updates and each drifting further from the others. Rather than do the same update seventy times, I led the work that brought them onto one current version, with the country and language versions handled properly inside it instead of by copying the whole thing again. Everything described further up this page had to hold seventy times over: the content carried across, every existing web address still working, the search rankings kept, and every division still able to edit its own pages the morning after the switch.