Administrative Assistant - San Diego, CA; Remote/Hybrid
San Diego, San Diego County, California, 92189, USA
Listed on 2026-09-18
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Business
Office Administrator/ Coordinator -
Administrative/Clerical
Office Administrator/ Coordinator
Administrative Assistant - San Diego, CA (Remote/Hybrid) (Finance)
The Opportunity:
Gemini Energy Services, a Tetra Tech Company
, is a leading independent service provider of wind and solar technicians in the United States. Our technicians support multiple types of wind turbine generators and renewable energy technologies, providing opportunities to build diverse technical skill sets through exposure to a variety of projects and equipment.
Gemini supports renewable energy projects across Operations and Maintenance, Construction, Research and Development, Inspection Services, and Engineering Services. Candidates supporting Gemini become part of an organization focused on providing high-quality services to the growing wind and solar energy industries. Gemini was acquired by Tetra Tech in 2014 and continues to support the growth of Tetra Tech's renewable energy operations and maintenance capabilities.
Gemini Energy Services is adding an Administrative Assistant to our Renewable Energy team based in San Diego, California. This position will provide administrative, accounting, staffing, and office operations support to help ensure efficient day-to-day business operations and workforce readiness.
The successful candidate will be highly organized, detail-oriented, comfortable managing multiple priorities, and able to communicate effectively with employees, managers, Human Resources, vendors, and other business partners.
Why Tetra Tech:At Tetra Tech, we are Leading with Science to solve the world's most complex challenges. Our industry-leading experts in engineering and consulting are committed to driving positive change in communities around the world. For over 50 years, we have been at the forefront of innovation and sustainability. Today we stand as a market leader, offering cutting-edge solutions in water, environment, energy, and international development.
Our work has improved more than 625 million lives around the world.
Join Tetra Tech to make a real difference. Our work leverages cutting-edge technologies, advanced analytics, and the expertise of world-class scientists and engineers to create meaningful change around the world. Discover your full potential - join us to advance your career while leaving a lasting legacy.
Essential Job Functions:Administrative & Accounting Support
- Reconcile invoices for Accounts Payable, employee expense reimbursements, and corporate credit card accounts.
- Create, maintain, and organize spreadsheets used to track accounts, invoices, receipts, clients, vendors, and other company data.
- Maintain accurate records and ensure proper document storage within cloud-based systems.
- Track and communicate employee work status and related updates.
- Prepare professional business correspondence, reports, memoranda, and other documents with minimal supervision.
- Adapt to changing business needs and assist with projects or responsibilities as assigned.
- Coordinate with Human Resources on the onboarding and offboarding of wind technicians and other employees.
- Prepare and maintain applicable employee documentation and records.
- Communicate with Human Resources regarding employee updates, including leave requests, policy questions, and changes in location or assignment.
- Serve as a liaison between management and Human Resources, providing updates regarding employee assignments and other staffing matters.
- Maintain confidentiality and handle employee and business information professionally.
- Maintain office inventory and order supplies as needed.
- Manage incoming and outgoing mail, Fed Ex shipments, and general office purchases.
- Organize and track company vehicle registrations and related documentation.
- Support employee access to company systems…
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