Brex Customer Success Manager Interview Questions

1.Tell me about a time a customer account was at risk and the problem clearly lived outside your lane — maybe in product, billing, or ops. What did you do about it?

2.Have you ever written something — a memo, a proposal, a Slack doc — that actually changed how your team handled a customer segment or internal process? Walk me through it.

3.Tell me about a time you pushed back on a quick fix that would have solved a customer's immediate pain but created a bigger problem down the road. What did you do instead?

4.Describe a time you delivered bad news to a customer — maybe a product limitation, a pricing change, or a mistake on Brex's side. How did you handle it and what happened to the relationship?

5.Tell me about a time you spotted a pattern across multiple accounts — churn risk, a product gap, an onboarding failure — that no one had formally flagged yet. What did you do with it?

6.Tell me about a time you wrote a proposal or summary that convinced your team or leadership to change how you work with a customer segment — maybe a new onboarding approach, a QBR format, or a playbook revision. What did you write and what changed?

7.A Series A startup just joined Brex and has 15 employees. Estimate how much they'd spend on the Brex card in their first 90 days, and walk me through your assumptions.

8.You have 40 accounts in your book. Roughly speaking, what percentage would you expect to expand, stay flat, and contract in a given quarter — and what drives each outcome?

9.Usage of Brex's expense management features drops 25% across your mid-market accounts in a single month. Nothing changed in the product. How do you figure out what's happening?

10.You're preparing for a QBR with a Series C company spending $90K a month across Brex card and business accounts. They've been a customer for 18 months. What metrics do you pull, and how do you decide what actually goes in the deck?

11.Brex is launching a new bill pay product and your team is asked to drive adoption across your books within 90 days. You have 38 accounts and no dedicated marketing support. How do you design your activation campaign?

12.You've just taken over a 45-account book from a CSM who left. After two weeks of discovery calls, you realize the book's reported 92% retention rate masks a lot — several accounts are technically 'retained' but completely disengaged. How do you assess the real health of the portfolio, and what do you do with what you find?

13.How do you calculate net revenue retention for a book of accounts, and what does that number actually tell you about the health of your portfolio?

14.Walk me through how you'd build and prioritize a renewal forecast for a 40-account book. What inputs do you use and how confident are you in the output?

15.A startup customer is 8 months into their Brex contract, active card spend is down 40% from peak, and the finance lead hasn't responded to your last two outreaches. How do you diagnose what's happening and what do you do first?

16.Your CFO-level sponsor at a mid-market customer wants to consolidate from Brex Spend Management onto a competitor's all-in-one ERP solution. How do you run the retention conversation?

17.You manage a portfolio of 35 accounts across a mix of early-stage startups and Series C+ companies. How do you allocate your time across that book, and what does a typical week look like in terms of where your hours actually go?

18.A customer's finance team is complaining that their month-end close is taking longer since they added Brex Spend Management, because expense data isn't syncing cleanly to their ERP. The problem involves Brex's accounting integration, their ERP configuration, and their own internal processes. How do you own this resolution without getting lost in finger-pointing?

19.A founder at one of your startup accounts calls you directly — bypassing their finance lead — to say they're unhappy with Brex's card limits and are thinking about switching to a competitor. How do you handle the next hour?

20.You're three weeks into onboarding a new mid-market customer onto Brex Spend Management and their IT admin has gone unresponsive — your ERP integration setup is stalled and the finance lead is starting to lose confidence. What do you do?

21.You find out through a mutual connection that one of your largest accounts — a Series B company spending $80K a month on Brex — is actively piloting a competitor. The customer hasn't said a word to you. How do you approach the next conversation with them?

22.Your product team just told you that a highly requested feature — one you've personally promised would be coming 'soon' to three of your accounts — just got deprioritized indefinitely. Two of those accounts are up for renewal in 60 days. What's your plan?

23.You're managing a high-growth Series C account that's been a strong Brex advocate. Their VP of Finance just left, and the new CFO comes in asking why they're spending $15K a month on 'duplicate tools' — they already use Concur and don't see why they need Brex Spend Management too. You have two weeks before their board meeting where budget decisions get made. What do you do?

24.You've identified that five accounts in your book are going to miss their contracted Brex card spend minimums this quarter, which triggers a fee — none of them know it's coming. Your manager says to let the billing system handle it. What do you do?

25.Tell me about a time you had to get something done through a team — maybe sales, product, or ops — where you had no formal authority over them. How did you move it forward?

26.Have you ever inherited a customer relationship that was already damaged — maybe by a previous CSM, a billing error, or a failed implementation? How did you rebuild trust?

27.Your sales AE is pushing you to expand a customer's Brex card program before the account is actually stable — there's an open support issue and the finance lead seems disengaged. How do you handle that tension with your AE?

28.You're two months from your own performance review and you realize the metric your manager cares most about — let's say logo retention — looks fine, but a leading indicator you track personally tells you three accounts are likely to churn next quarter. Do you surface that, and how?

29.You're the main CSM on a Series B company spending $60K a month on Brex. Their CEO just emailed your VP of Customer Success directly — copying you — to say the relationship is broken and they want a new CSM. Your VP forwards it and asks for your take. What do you write back?

30.You've been asked to represent the CSM team in a quarterly business review with Brex's Head of Product. Three of your accounts have flagged the same product gap — expense policy automation — and you want to make the case for prioritization. How do you prepare and what do you say?