When will the NESF hire me?| *Possible spoilers*

[larynx69]

I decided early on I wanted to eventually end up fighting the NESF-cause. However, I do not seem to be given any missions from them?

I have declined several others? Is there an option to work for NESF at all?
If there is, what will trigger this to happen? Might I just as well do missions for other factions and still be able to help NESF in the end?

[korpah]

its posible, after you got your 3e mothership, you get 4 options
go with the one to look for the merc ship and youl end up with the nesf

[Killer]

But watch out, after you find Grayhair, you must chose to run away from the incoming MSF patrol. This way you discover the grey fighter and can go to NSEF. If you decide to fight the MSF patrol, you will never get to the grey fighter and to NSEF.

[Wiaf]

So where do I land if I planted the bomb at the spacestation for that faction and then went ahead to do the alien encounters?