Faction Theme (Fallout 4)

people and who knows ,
I got to DIMA's quests
and I need to fiddle with the nuclear scientists in the haze,
but they demand entry into their faction
and I play for minis, I will lose contact with them
or after that I can join
the couple again somehow this moment is not very clear
or Is it possible to sit on two chairs?
py. sy.
yes, I have already built a current at the minicos TP until I jumped into it, the
quest will not disappear if I join the nuclear scientists?