I Appreciate your concern for your husband. The symptoms that you have mentioned above following the recent change in workplace situations (a stressor for your husband) has prompted me to think in the line of a provisional diagnosis of ADJUSTMENT DISORDER...Now, if this situation lingers for long and he is incapable to make himself comfortable in this workplace condition then I fear he may be having subtle degree of Depressive disorder in future. I would suggest you to take your husband to a psychiatrist who may give your problem a compassionate listening. At present he needs counselling that should focus on how to tackle such type of harsh workplace situation, how to enrich family harmony etc....he might also need a small dose of antidepressant + antianxiety medication...meanwhile please tell him to engage in games, gossips with friends etc....

I think he needs to consult for his emotional support with a Counsellor.  Sometimes ,  even  though you may feel that you are so conserved and caring about him could also affect him as he is not able to disclose or discuss  even with you.

Well, you already know what his problem is. You may be right in saying that he is getting into depression. I would advice you to take him to a psychiatrist and discuss the matter. Meanwhile both of you should realize the importance of Pranayama, meditation, yoga or some games(shuttle, tennis, swimming etc) to learn to cope with stress. Every job nowadays carries significant amount of stress. Coping with stress should be an ongoing lifelong process. Regular practice of Pranayama and meditation along with exercise (atleast daily walks) should not be ignored.