Oliver Wyman: the process and its assessments
The stages, the digital screens, and what varies by office, with dated sources.
Firm processes and online tests change from year to year and differ by office. Use this to prepare, and confirm the exact current steps on the firm's own careers page.
Key takeaways
- Application and screen: Online application and, in some processes, a short numerical online test (reported).
- First round: Case and conversational interviews (Oliver Wyman's description; number of interviews reported as about two).
- Final round: More case and conversational interviews with senior colleagues, and a written case in some offices (reported).
This lesson was checked against the sources listed at the end, official pages first. Firm processes change between offices, roles, and years, so use it as a guide and confirm the details in your invitation and with your recruiter.
The interview process, stage by stage
- 1Application and screen: Online application and, in some processes, a short numerical online test (reported). What it tests: Numeracy and reasoning.
- 2First round: Case and conversational interviews (Oliver Wyman's description; number of interviews reported as about two). What it tests: Analytical thinking and motivation.
- 3Final round: More case and conversational interviews with senior colleagues, and a written case in some offices (reported). What it tests: Reasoning under pressure and clear recommendations.
The assessments it uses and where they sit
- A short numerical online test in some processes (reported).
- Written case in some offices (reported).
What varies by office, region, and role
- Whether there is an online numerical test before interviews (reported).
- Whether a written case is part of the process (reported in some offices).
Points from public candidate accounts and prep sources
- Reported: cases can be more quantitatively demanding than average, so build stamina with longer calculations.
This platform builds the underlying skills these screens test and gives realistic practice in similar formats. It never provides or reproduces a firm's actual test, and firms do not allow AI tools, notes, or outside help during their assessments unless they say otherwise in writing.
Facts checked against sources on 2026-09-28. Sources, official pages first. "Reported" means a secondary source, not the firm or government itself.
- Oliver Wyman: Interview preparation (official): https://www.oliverwyman.com/careers/entry-level/interview-preparation.html
- Oliver Wyman: Marsh McLennan and its businesses will brand as Marsh (official): https://www.oliverwyman.com/media-center/2025/oct/marshmclennan-and-its-businesses-will-brand-as-marsh.html
- Reported: GraduatesFirst, Oliver Wyman recruitment process: https://www.graduatesfirst.com/oliver-wyman-assessment-tests
- Reported: IGotAnOffer, Oliver Wyman case interview: https://igotanoffer.com/blogs/mckinsey-case-interview-blog/oliver-wyman-case-interview
Sources for this lesson (4)
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