What's your job? What work would you like to do?
I like//want to work as a policeman.
J like to work as a policeman
Try saying it as. " I am a policeman. I am very happy with my profession."
But if you are not happy with your current job ,you can say it as " I am a policeman, but what I would really like to be is a teacher (or what other job you want to get into).
I think you want to say " I would like to work as a police officer" ??
J like work is policeman.