L.E.K. Consulting’s interview process is arguably the most data-intensive and slide-heavy of the major strategy firms. Unlike firms that prioritize high-level, theoretical 'blue sky' thinking, L.E.K. demands rapid, empirical fact-finding and immediate commercial impact. They are famous for their brutal 'due diligence' (M&A) sprints, and their interviews reflect this intensity. You will face heavy chart reading, rapid mathematical deduction, and cases that often require you to synthesize a massive amount of data into a single, cohesive recommendation in minutes. They evaluate candidates against their core values—'Practical impact', 'Uncompromising quality', 'Honesty', and 'Collaboration'. Cultural fit here means demonstrating extreme analytical rigor without an ego.