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Administrative Assistant Costa Mesa, CA

Job in Costa Mesa, Orange County, California, 92626, USA
Listing for: Robert Half
Full Time position
Listed on 2026-07-10
Job specializations:
  • Administrative/Clerical
    Office Administrator/ Coordinator, Virtual Assistant/ Remote Admin, Clerical, Executive Admin/ Personal Assistant
  • Business
    Office Administrator/ Coordinator
Job Description & How to Apply Below
Position: Administrative Assistant Job in Costa Mesa, CA | Robert Half

Administrative Assistant

We are looking for an organized Administrative Assistant to support daily office operations in Costa Mesa, California. This contract opportunity with potential for a permanent position is ideal for someone who is comfortable working on-site in a structured environment and can keep administrative activities running smoothly. The role calls for strong communication, attention to detail, and confidence using Microsoft Office tools to manage a wide range of office support tasks.

Responsibilities:

  • Coordinate day-to-day administrative activities to help maintain an efficient and well-organized office environment.
  • Prepare, format, and manage business documents, correspondence, and reports using Microsoft Office applications.
  • Support scheduling, calendar coordination, and general office communication for internal teams and leadership.
  • Maintain office records, track routine administrative tasks, and ensure information is organized and accessible.
  • Monitor inventory levels and arrange for office supply purchases to keep the workplace properly stocked.
  • Provide front-line administrative support by responding to requests, directing inquiries, and assisting with general office needs.
  • Help uphold office procedures and administrative standards while supporting smooth daily operations.
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