When hiring starts again after a recession, workers often need a new skill mix. If so, it's the trainer's job to make sure employees--both current and those being hired--have those skills. Now that it's time to consider hiring again, some new complications emerge. After layoffs, remaining workers likely took on more tasks and learned new skills. If new hires spelling them need the same mix, trainers will find themselves training on those new skills. Yet trainers' role is delicate as business begins hiring again. This article offers some tips when hiring.