Administrative Assistant- Irvine, CA

TriNet; Irvine (CA); On-site; USD 41,000 - 62,000; Full time

Job summary

TriNet in Irvine, CA is seeking an Administrative Assistant to support leaders across the organization. You will leverage AI to handle high-volume, standardized admin tasks, manage calendars, coordinate travel, and prepare reports.

The role emphasizes accuracy, discretion, and a service mindset, with opportunities to grow into a strategic EA through mentoring and cross-functional exposure. A 2-4 year experience and an associate degree are preferred.

Qualifications

• Associate degree preferred.
• 2–4 years of related experience.
• Excellent verbal and written communication.
• Strong organizational skills and a client-first attitude.

Responsibilities

• Expense report management: Process, reconcile, and submit expense reports using TriNet's expense management systems.
• Travel Coordination: Book domestic and international travel including flights, hotels, ground transportation, and provide complete itineraries.
• Purchasing & Procurement: Execute purchasing requests and manage purchase card reconciliation.
• Distribution Lists Management: Create, maintain, and update email distribution lists across departments and leadership teams.
• Reporting & Documentation: Generate routine reports, maintain documentation, and ensure accurate record-keeping.

Skills

Customer service

Highly organized

Discretion & confidentiality

Verbal and written communication

Adaptability

Policy communication

Education

Associate’s degree preferred

Tools

Microsoft Office Suite

Teams

OneDrive

OneNote

Job description

TriNet is a leading provider of comprehensive human resources solutions for small to midsize businesses (SMBs). We enhance business productivity by enabling our clients to outsource their HR function to one strategic partner and allowing them to focus on operating and growing their core businesses. Our full-service HR solutions include features such as payroll processing, human capital consulting, employment law compliance and employee benefits, including health insurance, retirement plans and workers’ compensation insurance.TriNet has a nationwide presence and an experienced executive team. Our stock is publicly traded on the NYSE under the ticker symbol TNET. If you’re passionate about innovation and making an impact on the large SMB market, come join us as we power our clients’ business success with extraordinary HR.Don't meet every single requirement? Studies have shown that many potential applicants discourage themselves from applying to jobs unless they meet every single requirement. TriNet always strives to hire the most qualified candidate for a particular role, ensuring we deliver outstanding results for our small and medium-size customers. So, if you're excited about this role but your past experience doesn't align perfectly with every single qualification in the job description, nobody’s perfect – and we encourage you to apply. You may just be the right candidate for this or other roles.A Brief OverviewThe Administrative Assistant (AA) will be responsible for utilizing AI to execute high-volume, standardized administrative tasks with accuracy and efficiency and operate within a metrics-driven model that tracks response times, completion rates, and service quality. The AA will be on a team providing centralized support in service of all leaders / departments at TriNet, gaining broad organizational knowledge and cross-functional expertise, with a structured development pathway to become a strategic EA through training, mentorship, and exposure to leadershipWhat you will doExpense Report Management: Process, reconcile, and submit expense reports using TriNet's expense management systemsTravel Coordination: Book domestic and international travel including flights, hotels, ground transportation as directed, provide complete itineraries and add to leader calendarsPurchasing & Procurement: Execute purchasing requests and manage purchase card reconciliationDistribution Lists Management: Create, maintain, and update email distribution lists across departments and leadership teamsReporting & Documentation: Generate routine reports, maintain documentation, and ensure accurate record-keeping for administrative processesBe knowledgeable and help communicate policy changes to Corporate Administration teamUtilize AI in every aspect of workAssist in creation of SOPs, intranet page.Coordinates travel and special projects as requestedGeneral administrative work: Heavy calendaring, purchasing within policy guidelines using a department Purchase Card, including expense validation, updating, and creating department process documentation within a central repository, event planning (dinners, happy hours, etc.)Act as point of contact in TriNet’s Irvine location for administrative professionals and workplace services in relation to various office visit protocols to ensure compliance with TriNet policiesProactively manage outstanding action items to ensure responsiveness and follow through on commitments / asksInteract extensively with administrative professionals within the Corporate Administration team as well as within other departments/organizationsAssists management with administrative tasks including preparing various reports detailing administrative information.Other projects and responsibilities may be added at the manager’s discretion.Performs other duties as assignedComplies with all policies and standardsEducation QualificationsAssociate’s degree preferredExperience QualificationsTypically requires general education, vocational training and/or on-the-job training, plus a minimum of 2 - 4 years of related experience.Skills and AbilitiesLeads with a customer service approach and highly organized mannerSense of urgency to accomplish tasks, both assigned and self-discoveredHigh level of discretionary judgment and confidentialityIdentify opportunities for process simplification and efficiency improvementsMaintain high attention to detail and accuracy in all workExcellent verbal and written communication skills as well as the ability to communicate with colleagues at all levels within the organizationA demonstrated dedication to high professional ethical standards and a diverse workplaceProficient in Microsoft Office Suite including Teams OneDrive and One NoteAbility to adapt to a fast paced continually changing business and work environment while managing multiple prioritiesA keen interest in how our business is run, and a thirst to learn every dayTravel RequirementsMinimalWork EnvironmentWork in a clean, pleasant, and comfortable office work setting. The work environment characteristics described here are representative of those an employee encounters while performing the essential functions of this job. Reasonable accommodations may be made to enable persons with disabilities to perform the essential functions.The preferred location for this role is Irvine, CA, and the salary range for this location is $29.76 to $44.62. All qualified external applicants will be considered for an in-office role, based in Irvine. All qualified internal candidates are encouraged to apply and consider relocation to Irvine and may be considered remote hire at the company’s discretion. The candidate’s final salary offer will be based on the candidate’s skills, education, work location and experience.A candidate’s compensation may also include bonuses consistent with TriNet’s corporate bonus plan.Additionally, subject to applicable eligibility requirements, TriNet offers permanent full-time employees a variety of benefits including medical, dental, and vision plans, life and disability insurance, a 401(K) savings plan, an employee stock purchase plan, eleven (11) Company observed holidays, PTO and a comprehensive leave program. Please click the following link for detailed information about our benefits offerings: https://www.trinet.com/documents/blt5b61a1040aae1904Please Note: TriNet reserves the right to change or modify job duties and assignments at any time. The above job description is not all encompassing. Position functions and qualifications may vary depending on business necessity.TriNet is an Equal Opportunity Employer and does not discriminate against applicants based on race, religion, color, disability, medical condition, legally protected genetic information, national origin, gender, sexual orientation, marital status, gender identity or expression, sex (including pregnancy, childbirth or related medical conditions), age, veteran status or other legally protected characteristics. Any applicant with a mental or physical disability who requires an accommodation during the application process should contact [e-mail] to request such an accommodation.