Since the actual storyline for fallout 4 would never fit Andrei in a million years I have been rolling with the idea, especially with the mods that I have including Sanctuary Estates, that he was (is?) rich. How did he get this way? Oh yeah because mercs existed pre war too and he owned a Merc company. Think Blackwater (also known as Xe and now Academi but you can change ur name as much as you want I guess) war crimes and all because Andrei don't give a shit.
And he actually half owned vault 111 and purposely froze himself so he could be around post war and use his skills and resources there, preferably with fewer critics (which obvs that part is true because of all the damn raiders and peeps like Talon Company). He didn't care if any of his employees made it. Some did though. A couple even wound up as ghouls. He isn't too crazy about that last part but they have Intel from the past 200 years so he will overlook them not being human anymore. For the time being.
He also is against synths so the Institute is his enemy but he is definitely wanting to steal all that tech they have been hoarding.
He is pretty neutral about the Brotherhood of Steel. If they stay out of his way they can do what they like since they are also anti synth and anti ghoul. He might, later on, join them for their tech and intel.
Which leaves the Railroad as being an enemy too. Point blank, enemy, because they are pro synth.
The Minutemen he is also cool with at least so long as they don't try to jeopardize his operations such as his takeover of the Commonwealth settlements.