Model Validator
Independently checks that the bank's models do what they claim, before anyone relies on them.
// 01 — THE WORK
The work is adversarial by design: reproduce the model, test it on data it has not seen, probe where its assumptions break, and write the limitations down in a way that survives a regulator reading it. Credit, capital, pricing, provisioning and increasingly machine-learning models all pass through here.
// 02 — WHO ARRIVES HERE
Statistics, mathematics, actuarial and data science backgrounds, and analysts moving across from credit risk or finance.
// 03 — WHAT THE INTERVIEW ASKS
These are the shapes the round takes, not a question bank — banks phrase them differently and the wording is never the point.
- 01How would you test a model whose developer says it works?
- 02What does this model assume that the world may not?
- 03The model is accurate overall and wrong for one segment. What do you do?
- 04How would you explain a limitation to someone who wants to use the model anyway?
- 05When is a simpler model the right answer?
- 06What would make you refuse to approve one?
What the panel is listening for. Independence with evidence — a validator who cannot say precisely what is wrong is as unhelpful as one who signs everything.
// 04 — WHY CREDIT PAYS IN THIS SEAT
A credit model is a claim about how borrowers behave; you cannot judge whether the claim is reasonable without knowing what a real file looks like, which is why validators who understand lending are the ones who get listened to.
That is the general case as well as this one. A bank's technology is not ordinary technology and its finance is not ordinary finance, and the second and third lines of defence — risk, compliance, financial crime, model validation and internal audit — recruit heavily out of the functions, taking the people who can already read a business. The case drills are free and are the cheapest way to build that, whichever column you sit in.
// ALSO IN RISK · COMPLIANCE · AUDIT
- Credit risk analyst
- Market and liquidity risk analyst
- Operational risk analyst
- Compliance officer
- Financial crime analyst
- Internal auditor
The whole board, and how the four blocks fit together, is on what jobs banks hire for.