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  3. Sr. Administrative Assistant - On-site (OC)
CO

Sr. Administrative Assistant - On-site (OC)

City of Hope·Irvine, California

Full Time·On Site·2-5 yrs·Posted 7 days ago
Practice for this role

About the role

Perform advanced clerical and administrative duties, including managing complex calendars and scheduling for senior management. Responsible for coordinating travel, preparing meeting materials, and handling confidential records and expense reimbursements.

About City of Hope Orange County City of Hope Orange County is transforming cancer treatment by bringing world-class expertise and specialized care closer to home.

Supported by a regional network of care, our 11-acre academic cancer campus in Irvine is home to City of Hope Orange County Lennar Foundation Cancer Center, our outpatient cancer center, and Orange County’s only cancer specialty hospital.

With the opening of the hospital, the full continuum of advanced cancer care—from prevention through survivorship—is available in Orange County for the first time, eliminating the need to travel for lifesaving treatment.

Seamlessly connected to our outpatient cancer center, the new clinical research hospital features 73 inpatient beds, advanced surgical suites, groundbreaking clinical trials, and holistic services such as rehabilitative therapy and spiritual care.

This isn’t standard cancer care.

This is lifesaving cancer care.

This is Hope.

Performs full advanced clerical, administrative, and general office duties.

Typically reports to a position responsible for a major function.

Business contacts include persons at all levels within the organization, industry, and community.

Manages complex calendars, schedules meeting and appointments for senior management.

Gathers data, summarizes and develops custom reports.

Works independently with minimal supervision and requiring no instructions on routine work and limited instructions on new assignments.

Requires thorough knowledge of company policy, organization, personnel and services.

As a successful candidate, you will: Organize & expedite flow of work through administrator’s office; initiating follow up action as appropriate.

Resolve routine and some complex inquiries and fulfill requests from internal & external business contacts using knowledge of division/department & organization policies & procedures.

Format, type & edit a variety of complex or technical material, including correspondence, memos, reports, presentations and confidential material Maintain calendar; Schedule appointments & meetings; coordinate meetings & agenda materials.

Make arrangements for meetings/conferences/travel for department personnel.

Prepare & distributes minutes of meetings.

Prepare all travel, lodging and conference registration for department leaders.

Initiate all business-related expense reimbursements including membership due renewals; travel reimbursement.

Maintain detailed accounting of all expenses.

Establish, maintain & have frequent access to confidential files, logs & records Assist in planning & organizing special projects May utilize assistance of lower level secretarial or clerical employees on a project basis

Your qualifications should include

2 years post high school trade, business or professional school Bachelor’s degree preferred. Experience may substitute for minimum education requirements. 3-5 years of prior related experience. Proficiency in Microsoft Outlook, Word, PowerPoint, Excel, Teams. Healthcare and surgery background preferred.

Additional Information

City of Hope employees pay is based on the following criteria: work experience, qualifications, and work location. City of Hope is an equal opportunity employer. To learn more about our Comprehensive Benefits, please CLICK HERE.

Requirements

Requires 3-5 years of related experience and proficiency in Microsoft Office Suite. A Bachelor's degree is preferred, though a post-high school trade or business school certificate is the minimum requirement.

  • bachelor degree
  • professional certificate
  • Administrative Support
  • Microsoft Teams
  • Microsoft Excel
  • Microsoft Word
  • Microsoft Outlook
  • Microsoft PowerPoint
  • Calendar Management
  • Meeting Coordination
  • Report Development
  • Travel Arrangement
  • Expense Reimbursement
  • Confidential Record Keeping

Posting details

Employment type
Full Time
Work arrangement
On Site
Experience
2-5 yrs
Location
Irvine, California
Posted
Jul 21, 2026
Application
Employer website
CO

Hiring organization

City of Hope

City of Hope's mission is to deliver the cures of tomorrow to the people who need them today. Founded in 1913, City of Hope has grown into one of the largest cancer research and treatment organizations in the U.S. and one of the leading research centers for diabetes and other...

Salary listed on 43 jobs
IndustryHospitals and Health Care
TypeNonprofit
Size10,001+ employees
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Market context

California senior admin roles stay competitive

In California, senior administrative assistant roles are often steady but competitive because employers look for proven office support experience, strong Microsoft Office skills, and the ability to handle scheduling, communication, and coordination with minimal supervision. A bachelor’s degree may strengthen candidacy, though a trade or business school certificate can meet the minimum requirement. Review the AI-summarized job requirements and benefits here to save time, then tailor your application to show 3–5 years of related experience and examples of managing priorities on-site.

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