This happened to my father whoe worked for Unisys. The company moved him from and the family from California to PA, then six months later tossed him aside for three younger employees. All he could do was take it to arbitration. He lost of course... Took another Senior Systems Analsyt job at 30 percent less pay to keep the family fed. It killed him. He died of cancer within a year. Unisys had a hand in that... imho.
Was your Dad in Mission Viejo ? I work next to the old Unisys building. Now a storage facility and RV parking lot. I think they moved to Blue Bell PA in the 90’s. Probably in China, today. Sorry to hear about your father.