Senior Administrative Assistant

Sr. Administrative Assistant

Are you highly organized, detail-oriented, and energized by helping a team run smoothly every day? Do you enjoy coordinating information, managing calendars and documentation, and being the “go-to” person who keeps things on track? This could be a great fit for you!

This is a hybrid role based in Mexico City, with the flexibility to work both virtually and from our local office, in line with Aon’s Smart Working policy.

Aon is in the business of better decisions

At Aon, we shape decisions for the better to protect and enrich the lives of people around the world. As an organization, we are united through trust as one inclusive and diverse team, and we are passionate about helping our colleagues and clients succeed.

How the day will look like

As an Sr. Administrative Assistant, you will play a key role in supporting the daily operations of our team and ensuring that administrative tasks are handled efficiently and accurately. You will:

• Coordinate agendas, meetings and conference calls, including booking rooms, sending invitations and preparing basic materials or summaries.

• Support document management: create, format and update files, presentations and reports in Word, Excel and PowerPoint, ensuring accuracy and proper version control.

• Assist with tracking information in spreadsheets and simple databases (e.g., contact lists, action logs, status trackers), helping the team keep information up to date.

• Manage incoming communications (emails, calls, requests), redirecting them to the appropriate person and following up where needed.

• Provide logistical support for team activities (e.g., training sessions, visits, events), handling basic coordination tasks.

What makes this opportunity different?

This role gives you:

• Exposure to a global, professional services environment, where you will interact with colleagues from different areas and levels.

• The chance to develop strong administrative and organizational skills that can serve as a foundation for growth into other roles (operations, project coordination, HR, etc.) within Aon.

• A collaborative team environment where your contribution to keeping things organized and moving will be visible and appreciated.

Skills and experience that will lead to success

• 3+ years of experience in an administrative, coordination or support role (e.g., office assistant, team assistant, customer support with strong admin component).

• Strong organizational skills and attention to detail; ability to manage multiple tasks and follow-ups in parallel.

• Proficiency with Microsoft Office (especially Outlook, Word, Excel and PowerPoint); comfortable working with basic tables and lists in Excel.

• Good communication skills and a service-oriented attitude; able to interact professionally with colleagues and respond clearly to requests.

• Willingness to learn, adapt and support the team in a dynamic environment; understanding that the quality of the administrative support directly impacts the team’s efficiency.

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