Mr. Warm and Fuzzy...NOT!

I've been in the medical field for over 30 yrs, and I've woked for ALL kinds of managers before. But NOONE is more of a jerk than the man I work for now.
He's an up and coming pretty boy, who thinks that he knows all.
He sits behind his desk and ONLY shows his face when the big iwgs come around, or someone reports him.
Case in point. I was injured on the job. Did all that I was suppose to do and was put in a different postion until I was cleared to return to my job. But that was not to be. I was called into his office and was suprised to see the head of workmans comp there, and was told I had to go on medical leave until I was released by my dr.
So I went home, depressed and upset.
Mind you he had told me, that either way, no matter happened, I was promised either job back upon my release.
Imgaine my suprise when after being told by HR that I SHOULD, to be on the safe side, look for another postion some where within the company, to find MY job posted ! I confornted him about it ,and he said he had no clue what I was talking about. To make along story short, he didn't want me back so I went to the head of the company and complained.
Needless to say, after many emails back and forth from the president I was allowed and released to return.
When I had returned I was called into his office and was told what I had done was wrong and he was hurt.
Since that day, he has made my life aliving hell, always over my shoulder, looking for me to slip up so he can fire me.
This is the first time I have EVER been so comitted to my postion. I will NOT be fired by this young preppy jerk.