Agree with Jubran. Having open discussions with the employees and keeping them engaged are important. Employees would have a million questions they want to ask especially to the buyer. Having a single point of contact, through the IMO that responsible for this, have served well in my experience. While there a lot of change management framework and tools, having a management team through the IMO that has strong focus on the employees, both from the seller and the buyer, would make the difference on how change is experienced on the ground.