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Posted June 13, 2026
Robert Half

Administrative Assistant

Petaluma, CA 94928, US Temporary
Compensation: $24 to $25 Hourly

We are looking for an Administrative Assistant to join a team in California, supporting proposal development and office coordination in a long-term contract position. This role focuses on turning technical input and pricing details into clear client-facing documents while maintaining a high standard of accuracy and presentation. The position also supports day-to-day administrative tasks and communication needs in a fast-paced environment.

Responsibilities:
• Create proposal documents by transforming estimator notes, draft content, and pricing details into final submissions ready for client review
• Enter, update, and organize proposal-related information within Sage 100 Contractor or comparable business systems
• Standardize document layout and presentation so each proposal is clear, consistent, and ready for client review
• Review completed materials carefully to correct grammar, spelling, formatting issues, and data inaccuracies before delivery
• Compile complete proposal packages and prepare final documents for timely distribution to clients
• Work closely with estimators and internal team members to confirm scope details, pricing, and supporting information are reflected accurately
• Provide general administrative support, including data entry, document coordination, and office assistance as needed
• Assist with front-desk and communication tasks such as handling inbound calls and supporting receptionist-related duties when required

Qualifications:

• Demonstrated experience in administrative support, proposal coordination, or document preparation roles
• Strong proofreading, business writing, and written communication skills
• High level of accuracy with excellent attention to detail in document and data management
• Proficiency with Microsoft Office applications, including Word, Excel, and Outlook
• Ability to manage multiple assignments and meet deadlines in a busy work environment
• Experience with data entry and administrative office procedures
• Familiarity with Sage 100 Contractor, Master Builder, or similar software is preferred

Compensation

$24.00-$25.00 Hourly

About Us

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 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.

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