If you are using a non-server product, you can specify the name of the company that is executing the project and the details about the project manager in the file properties window. Subsequently, these details can be automatically added to the headers of reports and printed form tables.
In Project 2007, this window could be opened from the File - Properties menu. With Project 2010 (as well as 2013, 2016, 2019, and Project Online Professional versions), you can access the properties window as follows:
File - Info - click on the Project Information button and select the Advanced Properties command: