In this economy, many people find it necessary to have second jobs. Reasons for those jobs vary from person to person and are needed for many different reasons. You probably have employees who have second jobs and you may not even know about them. Just because your employee has a second job does not mean they are not happy working for you.
Have you addressed second jobs in your handbook? Do you have a policy which states what kinds of jobs your employees may take? If not, you might want to take a look at the topic. Depending on what your business, is you might want to limit where employees can work part time. For instance, if you are a CPA firm you do not want your employee moonlighting for a tax place during tax season. In some industries it is OK to work in the same field, such as the food industry or healthcare. A nurse is a nurse no matter where they work but an accountant deals with clients. You do not want your clients going to another firm and following the employee.
It is a simple policy to implement and in certain cases much-needed. It also does not hurt to have in your handbooks that employees need to clarify it with human resources when they are seeking a second job. The point is not to tell them they can’t, but to make sure they are not moonlighting with a competitor and also to find out why they need it. Remember, they might really need it because of circumstances that you have no control over such as divorce, a spouse losing a job, kids going to college or they want to get out of debt. You need to be fair but firm with them.