Leland+ for Management Consulting

MBB Market Sizing Guide

You can get the number right and still fail the case. MBB interviewers aren't scoring your arithmetic; they're scoring whether you stated the equation before you computed, whether you caught that transactions aren't cups, whether you know an installed base from an annual sales flow and whether you finished with the business implication instead of the number. This guide is seven cases, ordered by difficulty, each written the way the question actually appears in a real interview: clarifying questions worth asking, the trap that catches the average candidate, a full worked answer, and a breakdown of what separates a strong one. You'll size: + Disposable cups at a national coffee chain + Airport throughput two independent ways + UK pet insurance + German elevator maintenance + US EV fast-charging in 2030 + An AI radiology product with no observable price + US residential HVAC

4 Case Interview Habits That Separate Offers From Rejections

Most case prep focuses on frameworks and practice. What it misses is the small habits that interviewers actually notice in the room. This cheat sheet covers 4 behaviors that consistently separate candidates who get MBB offers from those who don't. Based on real experience as an ex-McKinsey consultant and HBS MBA who has been on both sides of the interview table. Useful whether you have 3 weeks or 3 months until your interview.

McKinsey PEI - REAL EXAMPLES AND TEMPLATE

This resource is for folks who are preparing for the McKinsey PEI. The McKinsey PEI is a notoriously difficult interview to prep for as it's unique to the Firm. This short guide contains an explanation, real examples, and templates as you prepare your stories. Feedback from successful McKinsey candidates who have used this template: - "Sophie helped me a lot for preparing for McKinsey's PEI section, and I received feedback that it was a very strong part of my interview. The stories, and the way she helped me structure them, helped me stand out at other firms I recruited for as well. Would highly recommend!" - "I highly recommend her for your behavioral interviews. She has taught me how to approach it with a structure overall and within each of the STAR steps, making it very easy for my interviewers to follow through." - "Sophie taught me how to approach questions with a clear structure, both overall and within each step of the STAR method. This made my stories much easier for interviewers to follow."

Practice cases

4 Practice McKinsey-style cases, written by someone who has given 100+ cases at McKinsey.

Tracker Template for Practice Cases

This is a tool I used for my case tracking purposes, combined with other elements used by peers during our MBA recruitment cycle

McKinsey PEI: Behavioral Story Development Worksheet

This worksheet is a companion tool to the bootcamp / consulting offer week classes I teach on developing a compelling behavioral & PEI story, and walks through two frameworks for how to select a story and how to develop it in order to get to a strong first pass.

Deloitte Cover Letter

Received an interview

Accenture Cover Letter

Received interview invite

Consulting Resume

Received interview invites with BCG, McKinsey, Bain, Deloitte, Accenture, EY Health, Strategy&, Chartis

The Written Case Interview Playbook

Realistic BCG-style written cases with model answers, frameworks, and executive-level synthesis examples to sharpen your edge fast. This document is part 8 of a broader 9-part consulting interview resource kit. Please visit my page for additional resources.

Networking Messages That Get Replies from Consultants

9 proven networking templates engineered to help you land coffee chats, referrals, and interviews at top consulting firms. This document is part of a 9-part Consulting Interview Resource Kit. The Networking Email Template Pack is the fourth resource in the kit.

The Consulting Recruiting Command Center

Track every application, referral, networking touchpoint, and interview in one streamlined dashboard built for consulting recruiting. This document is part 9 of a broader 9-part consulting interview resource kit.

Case Math Mastery: 80 Drills to Think Like a Consultant

Build elite case math speed, accuracy, and confidence with 80 real consulting-style drills and worked solutions used to train MBB candidates. This document is Part 3 of a broader 9 Part Consulting Interview Resource Kit.

The BCG Offer Blueprint

The unfiltered insider playbook on how BCG actually evaluates candidates — from interviews to promotions to what separates offers from rejections. Written by a former BCG Partner. This document is part 1 of a 9 part Consulting Interview Resource kit.

50 BCG Behavioural Questions That Actually Matter

The exact behavioural questions top candidates prepare for — with insider notes on what interviewers are really testing beneath the surface. This document is Part 2 of a broader 9 Part Consulting Interview Resource Kit. See my page for other related resources.

The Resume Formula That Gets MBB Interviews

Learn how top candidates structure bullets, quantify impact, and position experience to pass the brutal MBB resume screen. This document is part 5 of a broader 9-part consulting interview resource kit. Please visit my page for the other templates and guides.

How to Break into MBB Consulting [5/27/2026] (Recording)

Many candidates aim for MBB but fall short because they don’t fully understand how to navigate the process from the inside out. This session is for those looking to break into McKinsey, BCG, or Bain with a more informed and intentional approach. You’ll learn how to differentiate your background, build meaningful connections during recruiting, and approach interviews in a way that reflects how top firms assess potential. Join live to hear from a panel of experts with MBB backgrounds and ask your questions about breaking into consulting. The panelists have firsthand experience both interviewing and coaching candidates and will share the patterns they see across those who successfully land offers. Expect candid insights and practical advice similar to what’s discussed in 1:1 coaching conversations.

How to choose the right Firm, Office, and Role in Consulting

Your consulting experience (and chances of getting in) are heavily influenced by the Firm, Office, and Role you choose. And nobody is talking about this. McKinsey NY is very different from McKinsey DC. A practice-affiliated consultant has a very different experience than a generalist. This course helps you understand what Firm, Office, and Role you should apply to based on your profile to have the highest chances of getting in.

Nailing the McKinsey PEI [5/22/2026] (Recording)

After this session, you will know how to structure a Personal Experience Interview response that resonates with McKinsey evaluators, including how to select the right stories, frame leadership moments with the right level of specificity, and avoid the pacing mistakes that consistently undermine otherwise strong candidates. The focus will be on how McKinsey interviewers actually probe PEI stories and what they are listening for beneath the surface of your answer. Attending live means you can ask about your specific story or background and hear how I respond to the details of your situation, which a recording cannot replicate. I work with consulting candidates on PEI preparation regularly, and what I share here reflects the patterns I see across candidates who successfully navigate this round.

What McKinsey, BCG, and Bain Look For [5/19/2026] (Recording)

FREE COACHING SESSION GIVEAWAY FOR LIVE ATTENDEES. Breaking into McKinsey, BCG, or Bain is highly competitive, and many candidates aren’t sure what actually sets top applicants apart. This session is for those targeting MBB who want a clearer understanding of how these firms evaluate candidates. You’ll learn what interviewers look for across resumes, case interviews, and behavioral assessments, how to demonstrate structured thinking and impact, and the patterns that consistently show up in successful candidates. Join live to hear from a panel of experts with backgrounds at MBB firms and ask your questions about the recruiting process. The panelists regularly work with candidates and will share what stood out to them when evaluating applicants. Expect practical insights and guidance similar to what’s covered in 1:1 coaching conversations.