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Sr. Administrative Assistant

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Robert Half

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Location:
United States , Costa Mesa

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Category:
Office Administration

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Contract Type:
Not provided

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Salary:

Not provided
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Job Description:

We are looking for a highly organized Sr. Administrative Assistant to support senior leadership and business development operations in Costa Mesa, California. This Contract position is ideal for an experienced, detail-oriented candidate who can manage executive priorities, coordinate complex logistics, and produce high-quality business materials in a fast-paced environment. The role calls for strong judgment, excellent communication, and the ability to keep multiple projects moving while maintaining accuracy and consistency.

Job Responsibility:

  • Support the President, Vice Presidents, and Business Development team with high-level administrative coordination and day-to-day operational assistance
  • Create and refine presentations, business proposals, reports, and other business documents for leadership review and external use
  • Track open tasks, deadlines, and follow-up items to help ensure commitments are completed accurately and on schedule
  • Monitor incoming deliverables from internal teams and external partners, confirming they meet timing, quality, and content expectations
  • Serve as a point of coordination for vendors, suppliers, and third-party partners, helping manage communication and next steps
  • Organize tradeshows, meetings, and special events by handling logistics, travel planning, printed materials, and promotional support
  • Maintain executive calendars and meeting schedules, balancing priorities and improving efficiency for senior leadership
  • Arrange detailed domestic and international travel, including itineraries, accommodations, and meeting coordination
  • Contribute to cross-functional initiatives, office operations, conference call coordination, and special projects as business needs evolve

Requirements:

  • Bachelor’s degree
  • At least 5 years of experience providing executive-level administrative support
  • Advanced skills in Microsoft PowerPoint, Word, and Excel
  • Strong time management abilities with a demonstrated capacity to manage multiple priorities under deadlines
  • Excellent written and verbal communication skills with a high level of professionalism
  • Exceptional attention to detail and a consistent record of accurate work output
  • Experience with calendar management, travel coordination, and administrative support for senior leaders

Nice to have:

  • Familiarity with Adobe InDesign, Illustrator, or Photoshop
  • proficiency in Mandarin and/or Spanish
What we offer:
  • medical, vision, dental, and life and disability insurance
  • 401(k) plan

Additional Information:

Job Posted:
May 05, 2026

Employment Type:
Fulltime
Work Type:
On-site work
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