Aon Data Analyst Interview Questions + Guide in 2025

Aon is a leading global professional services firm providing a broad range of risk, retirement, and health solutions, committed to helping clients make better decisions to protect and enrich the lives of people around the world.

As a Data Analyst at Aon, you will play a vital role in supporting the organization by utilizing data-driven insights to enhance client services and internal processes. Key responsibilities include writing complex SQL queries, analyzing trends, and generating reports that inform decision-making. You will collaborate with various teams to gather and interpret data, ensuring the highest quality and accuracy in reporting. Strong analytical skills, proficiency in SQL, and familiarity with data visualization tools like Power BI are crucial for success in this role. A passion for problem-solving, attention to detail, and effective communication are also essential traits that align with Aon's commitment to teamwork and client success.

This guide will equip you with tailored insights to maximize your preparation for an interview with Aon, helping you to present your skills and experiences in a way that resonates with the company’s values and expectations.

The interview process for a Data Analyst position at Aon is structured to assess both technical skills and cultural fit within the organization. Candidates can expect a multi-step process that includes various types of interviews and assessments.

1. Initial Application and Screening

The process begins with submitting an online application, which is followed by a resume screening. If selected, candidates will receive an invitation for an initial phone interview with a recruiter. This conversation typically focuses on the candidate's background, motivations for applying, and basic competency questions to gauge fit for the role and Aon's culture.

2. Technical Assessment

Following the initial screening, candidates may be required to complete a technical assessment. This could involve a video interview where candidates respond to a series of questions, including basic SQL queries and data analysis scenarios. The assessment is designed to evaluate the candidate's analytical skills and familiarity with data management tools. Candidates may also be asked to demonstrate their proficiency in SQL and Excel through practical exercises.

3. Behavioral Interview

Candidates who perform well in the technical assessment will be invited to a behavioral interview. This round typically involves meeting with a hiring manager and possibly other team members. The focus here is on understanding the candidate's past experiences, problem-solving abilities, and how they handle teamwork and challenges. Expect questions that explore how you have dealt with difficult situations, your strengths, and your approach to collaboration.

4. Final Interview

The final stage of the interview process may include an in-person or virtual interview with senior team members or executives. This round often delves deeper into the candidate's technical expertise and may include discussions about specific projects or datasets the candidate has worked on. Candidates might also be asked to present their findings from a given dataset or case study, showcasing their analytical thinking and communication skills.

Throughout the process, candidates should be prepared for a friendly yet professional atmosphere, as Aon emphasizes a supportive and inclusive culture.

As you prepare for your interview, consider the types of questions that may arise in each of these stages.

Here are some tips to help you excel in your interview.

Understand the Interview Structure

Aon's interview process typically consists of multiple rounds, including an initial HR screening, technical assessments, and managerial interviews. Familiarize yourself with this structure so you can prepare accordingly. Expect to encounter both behavioral and technical questions, and be ready to discuss your past experiences in detail.

Prepare for Technical Proficiency

Given the emphasis on SQL and data analysis in the role, ensure you are well-versed in SQL commands, joins, and syntax. You may be tested on your SQL skills during the interview, so practice writing complex queries and solving data-related problems. Additionally, brush up on your Excel skills, as you will likely need to demonstrate your ability to manipulate and analyze data effectively.

Showcase Your Analytical Skills

Aon values candidates who can analyze data trends and provide actionable insights. Be prepared to discuss specific instances where you used data analysis to solve problems or improve processes. Use the STAR (Situation, Task, Action, Result) method to structure your responses, highlighting your analytical thinking and problem-solving abilities.

Emphasize Team Collaboration

Collaboration is key at Aon, so be ready to discuss your experiences working in teams. Share examples of how you contributed to team success, navigated challenges, and communicated effectively with colleagues. Highlight your ability to build relationships and work collaboratively with diverse teams, as this aligns with Aon's inclusive culture.

Communicate Your Motivation

During the interviews, you may be asked about your motivation for applying to Aon. Be genuine in your response and articulate why you are drawn to the company and the specific role. Research Aon's values and mission, and connect them to your personal career goals and aspirations.

Be Ready for Behavioral Questions

Expect to answer behavioral questions that assess your soft skills, such as communication, adaptability, and conflict resolution. Prepare examples that demonstrate your strengths in these areas, and practice articulating them clearly and confidently.

Engage with the Interviewers

Aon interviewers appreciate candidates who are engaged and curious. Prepare thoughtful questions to ask at the end of your interviews, demonstrating your interest in the role and the company. Inquire about team dynamics, ongoing projects, or opportunities for professional development within Aon.

Reflect Aon’s Values

Aon prides itself on its commitment to diversity, inclusion, and continuous learning. During your interview, reflect these values in your responses. Share experiences that showcase your commitment to fostering an inclusive environment and your eagerness to learn and grow within the organization.

Follow Up with Gratitude

After your interview, send a thank-you email to express your appreciation for the opportunity to interview. This not only shows your professionalism but also reinforces your interest in the position. Mention specific points from the interview that resonated with you to make your follow-up more personal.

By following these tips and preparing thoroughly, you will position yourself as a strong candidate for the Data Analyst role at Aon. Good luck!

In this section, we’ll review the various interview questions that might be asked during a Data Analyst interview at Aon. The interview process will likely assess your technical skills, analytical thinking, and ability to work collaboratively. Be prepared to demonstrate your proficiency in SQL, data analysis, and your understanding of business concepts.

Technical Skills

1. Can you explain the difference between INNER JOIN and LEFT JOIN in SQL?

Understanding SQL joins is crucial for data manipulation and reporting.

How to Answer

Discuss the purpose of each join type and provide examples of when you would use them in a query.

Example

“An INNER JOIN returns only the rows where there is a match in both tables, while a LEFT JOIN returns all rows from the left table and matched rows from the right table. For instance, if I have a table of customers and a table of orders, an INNER JOIN would show only customers who have placed orders, whereas a LEFT JOIN would show all customers, including those who haven’t placed any orders.”

2. Describe a complex SQL query you have written. What was its purpose?

This question assesses your practical experience with SQL.

How to Answer

Outline the problem you were solving, the structure of your query, and the outcome.

Example

“I wrote a complex SQL query to analyze customer purchase patterns. It involved multiple JOINs across three tables: customers, orders, and products. The query aggregated data to show the total spending per customer over a year, which helped the marketing team tailor their campaigns effectively.”

3. How do you ensure data integrity when working with large datasets?

Data integrity is vital for accurate reporting and analysis.

How to Answer

Discuss methods you use to validate and clean data, such as checks for duplicates or outliers.

Example

“I implement data validation rules during the data import process, such as checking for duplicates and ensuring that all required fields are populated. Additionally, I regularly run scripts to identify and correct anomalies in the data, ensuring that the datasets I work with are reliable.”

4. What tools do you use for data visualization, and why?

This question evaluates your familiarity with data visualization tools.

How to Answer

Mention specific tools you have used and how they helped in your analysis.

Example

“I primarily use Tableau for data visualization because of its user-friendly interface and powerful capabilities for creating interactive dashboards. It allows me to present complex data in a way that is easily understandable for stakeholders, facilitating better decision-making.”

5. Can you explain a time when you had to analyze a trend in data? What was your approach?

This question assesses your analytical skills and problem-solving abilities.

How to Answer

Describe the situation, your analytical approach, and the results of your analysis.

Example

“I noticed a decline in customer retention rates over a quarter. I conducted a trend analysis using historical data, segmenting customers by demographics and purchase behavior. This analysis revealed that a specific age group was disengaging, prompting the team to adjust our marketing strategy to better target that demographic, which ultimately improved retention rates.”

Behavioral Questions

1. Describe a time when you had to work with a difficult team member. How did you handle it?

This question evaluates your interpersonal skills and ability to work in a team.

How to Answer

Focus on your conflict resolution skills and how you maintained professionalism.

Example

“I once worked with a team member who was resistant to feedback. I scheduled a one-on-one meeting to discuss our project goals and listened to their concerns. By addressing their points and finding common ground, we improved our collaboration and successfully completed the project.”

2. How do you prioritize your tasks when working on multiple projects?

This question assesses your organizational skills and ability to manage time effectively.

How to Answer

Discuss your methods for prioritization, such as using project management tools or setting deadlines.

Example

“I use a combination of project management software and a priority matrix to assess the urgency and importance of tasks. I regularly review my workload and adjust priorities based on project deadlines and stakeholder needs, ensuring that I meet all deliverables on time.”

3. Tell me about a time you made a mistake in your analysis. How did you rectify it?

This question evaluates your accountability and problem-solving skills.

How to Answer

Be honest about the mistake, how you identified it, and the steps you took to correct it.

Example

“I once miscalculated a key metric due to a formula error in Excel. I discovered the mistake during a review meeting. I immediately informed my team, corrected the error, and re-ran the analysis. I also implemented a double-check system for future analyses to prevent similar issues.”

4. Why do you want to work for Aon?

This question assesses your motivation and fit for the company culture.

How to Answer

Express your interest in Aon’s mission and how your values align with theirs.

Example

“I admire Aon’s commitment to making better decisions that positively impact clients and communities. I believe my analytical skills and passion for data-driven decision-making align well with Aon’s mission, and I am excited about the opportunity to contribute to such meaningful work.”

5. Where do you see yourself in five years?

This question evaluates your career aspirations and alignment with the company’s growth.

How to Answer

Discuss your professional goals and how they relate to the role at Aon.

Example

“In five years, I see myself in a senior data analyst role, leading projects that drive strategic decisions. I hope to develop my skills further in data science and contribute to Aon’s innovative solutions, helping the company grow and adapt in a rapidly changing environment.”