Employees
~87,354

About Aon

We are here to improve decision-making—safeguarding and enhancing the lives of individuals worldwide. By leveraging practical data-driven insights, combined with globally unified Risk Capital and Human Capital knowledge, and solutions tailored to local needs, our team supports clients across more than 120 countries, giving them the transparency and assurance to make more informed choices regarding risk and people, which in turn helps secure and expand their enterprises.

Key Facts
Approximately 87,354 employees globally
Operates in Insurance, Financial Services

Executive Leadership Team

►D
► David Sullivan
Chief Information Officer, Marketing and Experience
Since 2020
Aaron Davis
Aaron Davis
Chief Risk Officer
Since 2024
Adam Ellis
Adam Ellis
Chief Operating Officer, Claims, Global
Since 2019
Andy Weitz
Andy Weitz
Chief Marketing Officer
Since 2017
Andy Xydakis
Andy Xydakis
Global Chief Information Officer
Since 2025
Ariel Weintraub
Ariel Weintraub
Global Chief Information Security Officer
Since 2024

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Aon Executive Leadership Team

►D
► David Sullivan
Chief Information Officer, Marketing and Experience
Participating in the expansion of the firm via marketing and colleague experience functions. Highly engaged in transformational activities around the firm's external digital channels and the internal colleague experience (Intranet). Supporting our CMO, VP of Digital Marketing, and internal stakeholders supporting Aon's colleague experience function.
Since 2020
Aaron Davis
Aaron Davis
Chief Risk Officer
Since 2024
Adam Ellis
Adam Ellis
Chief Operating Officer, Claims, Global
Adam is currently the Global Chief Operating Officer and Head of Claims Platform for Aon’s Commercial Risk Claims organization, which includes 1,800 claims professionals in more than 50 countries, providing claims services to clients across 21 different product lines. His focus is building an inclusive culture across Aon’s Claims organization through the implementation of effective talent management, operations and technology strategies to improve the way Aon’s claims professionals work to deliver enhanced services for clients.
Since 2019
Andy Weitz
Andy Weitz
Chief Marketing Officer
Since 2017
Andy Xydakis
Andy Xydakis
Global Chief Information Officer
Since 2025
Ariel Weintraub
Ariel Weintraub
Global Chief Information Security Officer
Responsible for Aon's global cybersecurity program. The postings on this site/app are my personal opinions and are not the position of Aon plc, or its subsidiaries, clients, partners, or suppliers.
Since 2024

Business Focus Areas

Identified by BizNLP
Business Focus Areas
Spaceclaims consultingFinancial ServicesConsultingProfessional ServicesRisk managementConstructionAviationInsurancepropertyPowerEnergyHuman ResourcesBrokerageenvironmentalactuarial & analyticscrisis managementmarinereinsurancecasualty
🔓 to see the full technographic profile including all applications, infrastructure details, vendor contracts, and technology evaluation signals.

Aon Org Chart & Organizational Structure

Aon's organizational structure is led by Greg Case, who serves as Chairman, President and Chief Executive Officer. Reporting directly to the CEO are several regional and business unit leaders, including Jennifer Bell, Chief Executive Officer of North America; Jennifer Richards, Chief Executive Officer of Asia Pacific; David Griffiths, who holds the dual roles of President and President of the Healthcare Division; Rishi Mehra, Chief Executive Officer of Aon India and Head of Strategy, Human Capital Asia-Pacific; and Maureen Hanson, Managing Director. Aon's functional divisions under the CEO include Information Technology, Risk Management, Marketing, Operations, Strategy, Compliance, Human Resources, Finance, Sales, and an "Others" category. Within Information Technology, the leadership team includes Andy Xydakis as Global Chief Information Officer; Tanya H. and Rajesh S. Pillai both as Chief Information Officer, North America; ► David Sullivan as Chief Information Officer, Marketing and Experience; Sherif Zakhary as Chief Executive Officer, Strategy and Technology Group and Inpoint; Bob Olson as Chief Information Officer, Reinsurance; Rajeev Ranjan as Chief Technology Officer, Technology, India; and Chris Pallavicini as Chief Information Officer, Global Wealth IT Platforms. Sub-functions under IT include Information Security, Enterprise Architecture, IT Operations Management (ITOM), and Digital Transformation and Innovation. The Information Security group includes Ariel Weintraub as Global Chief Information Security Officer; Venkata Ravi Evani as Chief Information Security Officer, Information Technology; and Managing Directors Eric Seyfried (Aon Cyber Solutions), Chetan (Che) Bhatia (Cyber Solutions, Aon/Stroz Friedberg), Keith Royster (Security Testing Practice Leader), William Shortt (North America, Technology, Cybersecurity and Digital Advisory), Shruti Engstrom (Cyber and Errors & Omissions Product and Claims), and Robert O'Connell (Executive Managing Director, Global Cyber Strategy and Growth). In Enterprise Architecture, Tom Lentz serves as Chief Technical Officer and Senior Fire Protection Consultant. Within IT Operations Management, the Data Center Management sub-function includes Brian Hearst as Managing Director, Data Center and Life Sciences Builders Risk Leader. Tricia Blair leads Digital Transformation and Innovation as Chief Digital Officer. The Risk Management function reports to the CEO and includes the Chief Risk Officer, Aaron Davis. Under Risk Management, the team comprises Daniel Raizman, Managing Director and Global Head of Client Engagement, Climate Risk Advisory; Denise Savage, Managing Director, Mergers and Acquisitions, U.S. Risk Transaction Advisory Services; Elizabeth Steinman, CPA, ARM, CPCU, FCI, Managing Director, Risk Finance and Captive Consulting, Americas; Peter Lacovara, Managing Director, Alternative Risk; Karen Sullivan, Managing Director, Alternative Risk Transfer; Jeff Nicholson, Managing Director, US Commercial Risk and Health Sales Leader, US Health Sales; Edward Conlon, Managing Director, Litigation Risk Group; Kristin Kahn, Managing Director, Commercial Risk, Chicago Account Executive Practice Leader; James Tortorella, Managing Director, Property Risk Consulting, Aon; Nancy Tabs, Senior Managing Director, US Property Facultative Individual Risk; Monica Brecka, Managing Director, Umbrella and Excess Casualty Practice, Aon Risk Solutions; Bleu Bettencourt (Aon), Managing Director, Alternative Risk Transfer, Innovation; Douglas Tobiason, Managing Director, Aon Global Risk Consulting, Risk Management Outsourcing; and Brian Finnegan, Managing Director, Environmental Risk Solutions, Aon, Greater New York and New England. Under the Marketing function, Andy Weitz serves as Chief Marketing Officer. The Operations function under the CEO is led by Mindy Simon as Global Chief Operating Officer. Reporting to her are Adam Ellis, Chief Operating Officer, Claims, Global; Kristin Erbacher, Chief Operating Officer, Middle Market, Commercial Risk; Vedad Arslanagic, President and Chief Operating Officer; and Peter Robertson, Chief Operating Officer, Aon Affinity, US. The Strategy function includes Lambros Lambrou as Chief Strategy Officer, with the Innovation Management sub-function led by Jillian Slyfield as Chief Innovation Officer. Under Compliance, Greg Morris serves as Chief Compliance Officer. Human Resources is led by Curtis Edwards, GPHR, as Chief People Officer. The Finance function is headed by Edmund Reese as Group Chief Financial Officer. Finally, the Sales function includes Steven Carleton as Managing Director, Regional Sales Leader, Midwest. Within the "Others" category are Lisa Stevens, Chief Administrative Officer; Julian Ehrlich, Managing Director, Claims, National; and Jamie Smibert, Managing Director, Marine.

Frequently Asked Questions

7 questions

What does Aon's BizKonnect profile actually show?

An overview with industry, headquarters, employee count, and public/private status; an About section describing the business; Key Facts; an Executive Leadership Team list; and a preview of the OrgKonnect's GenAI-powered org chart built by BizKonnect.

Can I see Aon's complete org chart here, or just part of it?

You get a free preview of the top-level structure and business units, generated by BizKonnect's GenAI-powered org chart engine; the full chart with reporting lines and direct contacts unlocks via "Get Free Access to Full Org Chart."

How is Aon's organizational structure mapped on BizKonnect?

Aon's hierarchy is broken into functional departments IT, Finance, Commercial Sales, Operations and distinct business units, with GenAI-powered interactive org charts mapping reporting lines directly up to the CXOs.

Does the page show which executive oversees which function?

Yes, functions like Finance, Sales, Operations, and Information Technology are each tied to a named executive and their title, based on Aon's reported leadership structure.

Is executive tenure information included?

Each leader's profile shows how long they've held their role, marked "Since [year]," so you can see how recently Aon's leadership team has changed.

How do Aon's GenAI-powered org charts support Account-Based Marketing (ABM)?

The visual maps break down multi-person buying centers within Aon, helping ABM teams identify actual budget owners, understand peer reporting relationships, and run multi-threaded outreach without getting stuck behind gatekeepers.

Are there other companies worth researching alongside Aon?

Yes, a "Similar Companies" section links to comparable organizations in the same industry, generated by GenAI industry clustering to help expand your target account lists.