Speak with Barkeep, the underground bartender in Rostok base within the Rostok region, and ask if he has work for you. He'll present you with 3 choices, each a unique job you can undertake with ...

After completing the Visions of Truth main mission at STC Malachite, you'll receive a radio call from Dr. Shcherba asking for your assistance in collecting electronic collars from various locations ...