They "lay--off" any DV who has noticeable increase in their disability when they can get away with it. In 2016 when they had a contract renewal, they declined to rehire 2 techs on the grounds of position cuts in the new contract. 3 months later they terminated several techs for refusing to maintain certification. Both laid-off techs who were certified) applied, but declined to rehire them due to "mobility issues".