This person should continue to make Dua to Allah to keep him firm upon what he is doing in attiring himself in accordance to the way of the Prophet (s.a.w). He should understand that no matter what is the situation at present, the Qadr of Allah will come to pass, and it will never happen that Allah will deprive this person from a Halaal earning due to him wanting to follow the Sunnah of the Prophet (s.a.w). Let the person keep on trying while making Dua to Allah to give him an acceptable job.
And Allah Knows Best.
Mufti Waseem Khan.