Employment with US Govt affiliated Organisation and Impact on Mothers Visitor Visa

[rajan]

Hello,
I would wish to know if my working for an organisation affilaited to US goverment is a benefit/disadvantage for my sponsoring my mother for her tourist visa?

If a benefit what additional letters from my employer should I get.

Thank you and I await reply.
Please help: immihelp

[immihelp]

I don't see any difference.