Answered by Stephanie, Hiring Expert at AT&T Inc., on Tuesday, November 8, 2016
It would be difficult to determine the scope of your job without seeing your job description or employment contract. If it is open ended and not specific to work you would be doing for the on-site client, then there may be no reason to think you wouldn't be asked to take on projects on a larger scale. Frankly, this might give you more opportunity to grow and make more connections within the company.
There are employment laws in place (state by state) to ensure that hourly and non-hourly, exempt and non-exempt employees are not taken advantage of, and if you are concerned that there is a violation of the law happening, I would recommend checking out the laws in your state. If you are an hourly employee and not being paid for the hours you work, that would be a scenario where you might want to engage assistance.
If you are taking on extra work and working more hours and you are an exempt employee, you may want to talk to your manager about your workload and how they can better assist you in prioritizing the work. There are only so many hours in the day, and that is just a fact!
Best of luck!