How long does the Aon interview process take?

Most candidates spend between 4 and 8 weeks from recruiter screen to offer. The onsite loop itself runs in a single day or is split across two half-days, with debrief and offer typically within 5 business days after.

How should I prepare specifically for Aon?

Focus on three things: (1) the company DNA shown above - what they actually grade for, (2) the rounds in your loop, especially the round most candidates underestimate, and (3) drilling on the question types in this guide using a structured framework like CIRCLES or STAR.

Does this apply to engineering or design roles at Aon?

The DNA stays the same - what changes is the round mix. SWE candidates face coding screens instead of Product Sense; designers face portfolio reviews and design exercises. The "what they value" and behavioral signals carry across all functions.

Other roles at Aon:IB Analyst Sales Product Manager Strategy Consultant

Enterprise · Strategy Consultant Interview Guide

How to Pass the Aon Strategy Consultant Interview in 2026

The Aon DNA (TL;DR)

Aon's client-facing roles often require candidates to articulate complex risk solutions clearly. Interviewers assess your ability to structure arguments and present insights, often through case studies or discussions about past project 'TIMELINE's, emphasizing logical flow and impact.

The Aon Interview Loop

Your onsite loop will typically consist of 5 rounds.

1
Round 1
Recruiter Screen
Motivation, fit, why consulting.
2
Round 2
Case Interview
Market sizing, profitability, market entry, M&A - structured problem-solving with hypothesis-driven analysis.
3
Round 3
PEI / Personal Experience
STAR-style stories on leadership, entrepreneurial drive, personal impact.
4
Round 4
Fit / Partner Round
Why this firm, why this office, deeper resume walkthrough with senior partner.
5
Round 5
Behavioral / Leadership
Past evidence of ownership, influence, resolving conflict.

The Danger Zone: Top Reasons Candidates Fail

Based on our database of Aon interview outcomes, avoid these common traps:

Avoiding the conflict or failing to reach a resolution.
Describing a situation where they were a follower, not a leader.
Describing a situation where they simply presented their view without active listening or seeking common ground.
Not demonstrating a focus on preserving the working relationship or achieving a positive outcome.

Test Yourself: Real Aon Questions

Three real prompts pulled from our database.

Type · Influence

Describe a situation where you had to influence a stakeholder (colleague, manager, client) who initially disagreed with your perspective. How did you approach it, and what was the result?

Type · Market Entry

Should Aon acquire a smaller, specialized InsurTech firm to enhance its digital offerings in the commercial insurance space? Evaluate the strategic rationale and key risks.

Type · Firm Fit

Based on your understanding, what are Aon's key strategic priorities in the next 3-5 years, and how does the strategy consulting practice contribute to them?

+ many more questions, signals, and worked examples

Unlock the rubric

Aon Interview Question Bank

A sample from our database, grouped by round. Sign up to see the full set.

9 of 19 questions shown

Recruiter Screen

1
Type · Motivation
Why are you interested in strategy consulting at Aon, particularly within our finance and enterprise practice?

Case Interview

2
Type · Market Sizing
Estimate the total addressable market for Aon's cyber risk consulting services in the EMEA region for large enterprises.
3
Type · Profitability
Aon's Risk Advisory division is experiencing declining profit margins. What are the potential causes, and how would you diagnose the core issues?
+ 2 more questions in this round (sign up to unlock)

PEI / Personal Experience

4
Type · Leadership
Describe a time you led a team through a significant change or challenge. What was your approach, and what was the outcome?
5
Type · Entrepreneurial Drive
Tell me about a time you identified an opportunity and took initiative to pursue it, even without explicit direction. What was the result?
+ 1 more questions in this round (sign up to unlock)

Fit / Partner Round

6
Type · Resume Deep Dive
Walk me through your experience at [Previous Company/Project]. What was your most significant contribution, and what did you learn from it?
7
Type · Firm Fit
Based on your understanding, what are Aon's key strategic priorities in the next 3-5 years, and how does the strategy consulting practice contribute to them?

Behavioral / Leadership

8
Type · Past Experience
Tell me about a time you had to influence a senior stakeholder or a cross-functional team to adopt your product vision or strategy when they were initially resistant.
9
Type · Past Experience
Tell me about a time you had to make a difficult trade-off in a project due to resource constraints or competing priorities. How did you make the decision, and what was the outcome?
+ 7 more questions in this round (sign up to unlock)