Redesigns, re-platforms and domain moves are where organic traffic quietly disappears. We've handled migrations on complex sites where a dip in performance would cost real money, and brought them out the other side with rankings intact. The difference is process: we're in from the wireframe, every URL is mapped before launch, and nothing goes live on a hope.
From the first wireframe to weeks after launch, every step is run to protect the rankings and revenue you've already earned, and set the new site up to do better.