Onsite Administrative Assistant - Health Programs

Ultimate Staffing Services; Costa Mesa (CA); On-site; USD 25,000 - 36,000; Full time

Job summary

Ultimate Staffing Services is seeking an organized Administrative Assistant for an onsite, temp-hire role in Costa Mesa, CA. You will provide comprehensive administrative support, manage front-office activities, schedule appointments, and maintain client records with strict confidentiality.

The ideal candidate has 1–2 years in admin roles, strong communication, and proficiency in Microsoft Office. A mission-driven organization focusing on behavioral health services offers a stable environment

Qualifications

• High School Diploma or GED required.
• 1–2 years admin/clerical experience preferred.
• Excellent verbal and written communication skills.
• Strong organizational and time management abilities.
• Proficiency with Microsoft Office Suite (Word, Excel, Outlook, PowerPoint).
• Ability to maintain confidentiality and handle sensitive information.

Responsibilities

• Greet and assist clients, families, visitors, and partners professionally.
• Answer and direct calls, take messages, and respond to inquiries.
• Schedule appointments, trainings, and intake sessions.
• Maintain confidential client and employee records per HIPAA.
• Prepare, file, and distribute documents and reports.
• Manage office supplies and inventory.
• Support onboarding for new employees and leadership calendars.

Skills

Office administration

Multitasking

Verbal & written communication

Customer service

HIPAA compliance

Education

High School Diploma or GED

Tools

Microsoft Office Suite

Job description

Ultimate Staffing Services is seeking an organized Administrative Assistant for an onsite, temp-hire role in Costa Mesa, CA. You will provide comprehensive administrative support, manage front-office activities, schedule appointments, and maintain client records with strict confidentiality.

The ideal candidate has 1–2 years in admin roles, strong communication, and proficiency in Microsoft Office. A mission-driven organization focusing on behavioral health services offers a stable environment