Senior Administrative Assistant

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 engaged team, and we are passionate about helping our colleagues and clients succeed.

The Senior Administrative Assistant is a full-time, office-based role responsible for providing a combination of administrative support, workplace services, and on-site event assistance. This role serves as a visible and trusted on-site resource, helping colleagues, leaders, clients, and visitors navigate the office environment smoothly and professionally.

This role is ideal for a highly organized, service-oriented professional who enjoys being in the office, creating positive experiences for others, and serving as a dependable resource for administrative, workplace, VIP, and event-related needs. The successful candidate will be proactive, polished, flexible, and comfortable balancing hands‑on support with strong coordination, judgment, and follow‑through.

• Full-time, five days per week in the office in our Denver, CO office.
• Requires regular interaction with colleagues, senior leaders, clients, visitors, vendors, Facilities, IT, Security, and other workplace partners.

This role offers the opportunity to work closely with leaders and cross-functional teams while influencing the day-to-day employee and client experience. Your work will contribute directly to workplace readiness, operational efficiency, and the successful coordination of meetings, events, and executive priorities.

• Prepare, print, distribute, and organize business documents, presentations, meeting materials, and other administrative resources.
• Prepare agendas, capture notes, document decisions, and monitor action items when requested. Organize business documents.
• Manage ad hoc requests with professionalism, accuracy, discretion, and a high level of responsiveness.

Workplace and General Location Services:

• Coordinate virtual, in‑person, and off‑site meetings—including agendas, materials, catering, technology, and logistics—as well as office supplies, mail services, meeting spaces, workplace technology, and vendor-supported services.
• Prepare, proofread, organize, and maintain business documents, records, files, presentations, and correspondence.
• Monitor designated inboxes, prioritize communications, and ensure timely follow‑up on requests and action items.
• Provide administrative support to assigned consumers and business leaders, including calendar management, scheduling, travel planning, and expense reporting.
• Serve as an on-site resource for workplace operations, office readiness, visitor support, and general office administration.
• Welcome clients, visitors, senior leaders, and executives while supporting VIP visits and office events.
• Support onboarding activities, workplace initiatives, on‑site office events, meeting, and employee or client-facing events.
• Assist with room setup, registration, guest greeting, signage, meeting materials, catering coordination, and day‑of execution.
• Help coordinate event teardown, follow‑up items, and post‑event workplace readiness.
• Partner with Facilities, IT, Security, and vendors to resolve workplace issues and maintain a seamless employee experience.

• Experience providing administrative or executive support in a corporate, professional services, hospitality, or client‑focused environment.
• Ability to manage confidential information with professionalism, sound judgment, and discretion.
• Experience with document…