Hello,
While I'm new to freelancer I have by now a 100% completion rate for all the projects that I worked on. My name is Dragos and I'm a Senior System Administrator with more than seven years of working experience in the web hosting industry, experience that has been gained while working for one of the top web hosting companies from USA - California.
When it comes to the project that I'm bidding on, I will be more than happy to help you change the primary domain and the associated nameservers, of your server that is running cPanel/WHM, I can work either remotely with SSH access on the environment, or using TeamViewer or any other similar solutions.
If you have any questions regarding this please let me know.
Thank you,
Dragos