I recruit for a consulting-adjacent firm and I've sent a few candidates BCG's way. I also did the BCG screen myself years ago when I briefly considered going in-house there. Let me be direct about what happens in that 30 minutes.
The BCG recruiter screen is more substantive than most. It's not just a "confirm your resume" call.
What they actually cover: Background walk-through: not a full retelling, they pick 2-3 pivots in your career and ask "why did you make that choice?" They're checking for intentionality and coherence. Why BCG specifically: this is NOT a throwaway question. They mean it. You need a real answer about why BCG's model, the BCG X digital ventures unit, or their specific tech org appeals to you. "Good brand name" is a trap. Talk about specific practice areas, the type of work, or the internal platform you'd be building. Availability and logistics: timeline, notice period, location preferences (especially relevant if Chicago vs. NYC vs. remote). Visa status comes up here if applicable. Comp expectations: they do ask early. Know your number. If you're coming from FAANG, they'll note the delta and probably come back to it in the offer conversation. One or two behavioral openers: usually soft versions of what comes later. "What's a challenging project you've worked on recently?" They're taking notes, not evaluating deeply yet.
The screen sets the frame for everything after. If you're vague on the "why BCG" question, I've seen that derail candidates who were technically very strong. The recruiters there are unusually senior for a first screen.
My practical advice: research the specific team you're applying to. BCG X is different from BCG's internal IT org is different from their AI & digital group. Bring a real view on which one and why.