Administrative Assistant Job in Centennial, CO

Administrative Assistant

We are looking for an Administrative Assistant to support a busy nonprofit team in Greenwood Village, Colorado. This part-time, on-site opportunity offers 20 hours per week with flexible scheduling and is a contract position with the potential to become permanent for someone who thrives in a collaborative, service-focused environment.

The role centers on membership support, office coordination, data accuracy, and event preparation, making it ideal for a dependable individual who can work independently while staying highly organized.

Responsibilities:

• Provide day-to-day administrative support for office operations, including general clerical tasks and responsive assistance with incoming questions.
• Manage membership-related activities such as responding to inquiries, processing payments, updating records, distributing dues notices, and supporting event registrations.
• Maintain and improve the accuracy of membership and contact information across a large database, including data cleanup for thousands of individual records.
• Prepare correspondence, mailings, and electronic communications using Microsoft Office tools, including document formatting and mail merge activities.
• Assist with planning and coordination for conferences and events by organizing materials, gathering member-contributed items, and helping with logistics as needed.
• Support a major event that may require travel in October, including on-site coordination and preparation before and after the program.
• Handle data entry and office documentation with a high level of accuracy while helping reduce workload across the team.
• Provide administrative support for periodic financial or operational tasks, including assisting with annual check distribution for an affiliated nonprofit organization.