Administrative Assistant III

Overview

This role is onsite (remote Fridays after training period) in Sacramento.  Candidate must live in or near Sacramento.

Brightstar is seeking a highly organized and proactive Admin Assistant III to provide comprehensive administrative support at our Sacramento site. This role is primarily onsite, with the opportunity to work remotely on Fridays following the completion of the training period.

The ideal candidate is a strong problem-solver with exceptional attention to detail, excellent communication skills, and experience thriving in a fast-paced office environment. This role requires the ability to manage competing priorities, coordinate complex schedules, and meet changing deadlines while supporting senior leaders and cross-functional teams.

Responsibilities

•    Process daily, weekly, and monthly customer invoicing with a high level of accuracy and timely turnaround.
•    Perform data entry across multiple Excel spreadsheets and SAP systems.
•    Scan, copy, and manage sensitive and confidential documentation.
•    Manage Office PCard expenses, including monthly reconciliation and ensuring compliance with purchasing policies.
•    Oversee the Purchase Order (PO) process, working directly with vendors to establish POs, provide invoice payment details, and ensure accurate billing.
•    Request vendor quotes as needed.
•    Develop and maintain expert-level knowledge of MediusFlow to properly code and route invoices for approval.
•    Coordinate and schedule travel, meetings, and appointments across multiple time zones.
•    Manage complex calendars using sound judgment to optimize cadence and meeting effectiveness.
•    Prepare meeting agendas, presentations, and logistics; support recurring staff meetings and annual staff events.
•    Draft written communications, reports, and other materials as required.
•    Support office management activities, including ordering supplies, catering, petty cash management, visitor badge access, staff lunches, and license renewals.
•    Provide administrative support to Human Resources, including onboarding, offboarding, and HR-related correspondence.
•    Build a strong understanding of business priorities to provide effective support to the General Manager and leadership team.
•    Serve as a liaison and proactive problem-solver across teams.
•    Support Field Services with Purchase Order creation and order-related information.
•    Participate in projects addressing departmental or organizational initiatives.
•    Perform additional duties as assigned.

Qualifications

•    Advanced proficiency in Microsoft Office (Outlook, Word, PowerPoint, Excel).
•    Prior experience in an office-based administrative support role.
•    Highly organized, detail-oriented self-starter with strong follow-through.
•    Demonstrated ability to manage multiple projects simultaneously in a dynamic environment.
•    Excellent written and verbal communication skills.
•    Strong interpersonal skills with the ability to work effectively across all levels of the organization.
•    Positive, proactive mindset with a strong sense of urgency and accountability.
•    Ability to exercise independent judgment with minimal supervision.
•    Proven ability to anticipate issues and take initiative to resolve them.

Success Profile

• Leading Complexity
• Leading People
• Leading the Business
• Leading Self