Time to move on from the 2018 thread as all the news is about 2019.
From Rotoworld with Rotoworld comments:
Vikings hired Gary Kubiak as an offensive advisor.
Gary's son Klint will take over as quarterbacks coach with Kevin Stefanski promoted from interim offensive coordinator to full-time OC. An in-season power struggle is not difficult to envision should the Vikings start slow on Stefanski's watch surrounded by Kubiaks, but it's obviously a risk coach Mike Zimmer is willing to take. Kubiak is a longtime confidante of Mike Shanahan, who drafted Vikings QB Kirk Cousins in Washington.
Source: Adam Schefter on Twitter
Packers hired ex-Jaguars OC Nathaniel Hackett as offensive coordinator.
Hackett and new Packers coach Matt LaFleur have never worked together at any of their previous stops. But Hackett has plenty of experience as a play-caller and will be a nice addition for LaFleur to bounce ideas off of in his first year as head coach. Hackett was fired by the Jaguars back in November, but the Jags' issues ran much deeper than Hackett, who just the previous year got Blake Bortles to play the best ball of his career. Hackett, LaFleur, and DC Mike Pettine are in place.
Source: Ian Rapoport on Twitter