Gambling Addiction & Recovery Support Group
Compulsive gambling is an urge or addiction to gamble despite harmful negative consequences or a desire to stop. A preferred term among many professionals is problem gambling, as few people described by the term experience true compulsions in the clinical sense of the word. Problem gambling often is defined by whether harm is experienced by the gambler or others rather...

I do believe your job could be in danger by coming clean to a supervisor or even entering a "confidential" treatment program. In my state if you work in any capacity dealing with the state lottery, or in a casino or a counselor learns that you have committed a crime against an elderly or disabled person by gambling with their money, the counselors are mandatory reporters for abuse and mandatory reporters to the state lottery as they are funded by it. The fact that you may lose your license is probably real.
However, I am having a problem with your statement, "I have to keep my job". I can understand that it may be a good job, with great benefits that you like, but does that mean you have to keep this job forever? The best time to look for another job is when you have one. You can do some job hunting without letting your current employer know. You might find a better job if you look. When you have a job, it allows you to be more picky, look for your dream job. (I am assuming one that is making you physically sick is not your dream job.) Take some time at least to explore some other possibilities. Feeling "stuck" and like we have no options is part of what makes us give up hope.
Find something else to do on your off time. Hang in there.
This group has also been a life saver. Any time I feel like going, I post a thread and ask for help, or comment on someone else's. It feels like a real community and gets me through the urge.
Another option is GA meetings.
I don't know how to tell you to do this with your job. I couldn't do it with your job, I know that, but maybe you are stronger than me and able to do it without quitting.
We are here for you.
Well, if you love your job, then if there's a will, there's a way. I honestly could not do it, but I'm sure there are recovered alcoholics who serve alcohol or work for alcohol-based companies. You can find a way.
Remembering the way you feel after you gamble, not the rush before or during, but the self-hatred, shame, anger, depression, desperation, grief, regret, and ironic desire to go back right away. The way many of us would scrape up coins from the bottom of our bags or floors of our cars just to go back for another "hit" of our drug of choice. The way we would lower ourselves to lying, cheating, stealing, deceiving our loved ones, showing up late, giving up on hygiene, skipping work, losing all sense of decency and responsibility and humaneness. It is those that are the feelings to keep at the front of your brain and to associate directly with gambling.