I'd ask a few co-workers for help and have some of them walk past his crate/cage and drop a high-value treat into it and keep going, which should begin to allow him to associate strangers with good things to eat and see if that starts to help him feel better about the strangers he comes in contact with.
He's obviously so undersocialized that only taking him out of his crate/cage on the leash - a loose leash not held taut - and having one stranger a day come close by him, drop a treat at his feet and sit by him within 24" of his body, presenting only their side to him, with no eye or physical contact for a couple of minutes at a time will start to show him that not all strangers are that scary and that nothing bad will happen to him when he's in the company of a stranger.
Having a different person do this two or three times a day should start to desensitize him to strangers when nothing really bad happens to him during those close-encounters. Go very slowly with him and don't move forward to have anyone make any overtures to him UNLESS he begins to sniff and show friendliness to others first. That's how I'd start in on this poor, sweet baby and begin to help him have better associations with people.
__________________  Jeanie and Tibbe One must do the best one can. You may get some marks for a very imperfect answer: you will certainly get none for leaving the question alone. C. S. Lewis |