We quite regularly are working with graduates and students who are already working in a job. A lot of times, they are simply scared to work with career services as a fear that it'll get out to their employer that they are looking for a job. This isn't the case, and it's taking a great resource and pushing it to the side. Looking for a job while you're currently working sounds like a complicated and messy thing to do, but it shouldn't be the reason you don't go after your dreams.
Here is a useful article that has tips on how to job search when you're already employed.