Sr. Administrative Assistant

Robert Half • Costa Mesa, CA • 3h ago

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.

Responsibilities:

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 required.

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.

Familiarity with Adobe InDesign, Illustrator, or Photoshop, and proficiency in Mandarin and/or Spanish, are valued assets. TalentMatch®

Robert Half is the world's first and largest specialized talent solutions firm that connects highly qualified job seekers to opportunities at great companies. We offer contract, temporary and permanent placement solutions for finance and accounting, technology, marketing and creative, legal, and administrative and customer support roles.

Robert Half works to put you in the best position to succeed. We provide access to top jobs, competitive compensation and benefits, and free online training. Stay on top of every opportunity - whenever you choose - even on the go. Download the Robert Half app (https://www.roberthalf.com/us/en/mobile-app) and get 1-tap apply, notifications of AI-matched jobs, and much more.

All applicants applying for U.S. job openings must be legally authorized to work in the United States. Benefits are available to contract/temporary professionals, including medical, vision, dental, and life and disability insurance. Hired contract/temporary professionals are also eligible to enroll in our company 401(k) plan. Visit roberthalf.gobenefits.net for more information.

© 2025 Robert Half. An Equal Opportunity Employer. M/F/Disability/Veterans. By clicking "Apply Now," you're agreeing to Robert Half's Terms of Use (https://www.roberthalf.com/us/en/terms) and Privacy Notice (https://www.roberthalf.com/us/en/privacy) .

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