You don’t need any qualifications to be a janitorial worker, but employers will find you a more attractive candidate if you have a high school diploma or GED. This shows you have basic arithmetic skills and can communicate well with all sorts of people at your job. Having any previous experience in janitorial work is always a good thing, but most employers will offer on-the-job training and will teach you their own cleaning and safety standards. However, by way of janitorial apprenticeships, you can gain expert knowledge on different areas of cleaning that will benefit you in any type of job. Having standard knowledge in cleaning subjects might even set you apart as a potential staff manager because of your ability to train others in your education and skills. You should check out your community college or vocational schools to see if they offer courses in custodial services or apprenticeship programs with local businesses and experienced professionals. Some colleges offer a janitorial apprenticeship that covers topics ranging from cleaning chemicals, floor care equipment and safety methods.