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Reiza OyinaRO

Reiza Oyina

Administrative Assistant & Office Manager

€280/day
2 projects
Lyon, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Reiza

Your schedule is overflowing, your invoices are piling up, your clients are waiting — it's time to delegate.

Independent administrative and operational assistant, I help entrepreneurs with operational management, mission follow-up, and administrative structuring of projects.

With 13 years of experience in administrative, project, and operational assistance, I have worked in several companies, particularly in the fields of (Construction, Engineering, Audit & Consulting, and Regulatory Control Offices).

Tools used:
Office Suite/ Notion/Slack/ Canva/ AI tools/ Trello/ Google Workspace/ Invoicing Software

What I offer:

1) Operations Management:

Intervention planning and schedule management
Tracking mission progress and coordinating field teams
Updating management tools and ERPs
Formatting technical documents + reports
Administrative follow-up of clients, contracts, and purchase orders
Document management (DOE, minutes, audits, controls)
Administrative follow-up of clients, contracts, and purchase orders

2) Administrative Management:

Quotes and follow-ups
Invoices
Mail management
Administrative file processing
Drafting and formatting correspondence
Filing / digital archiving
Bid management
Sending reports
Document summaries
Contract and deadline tracking
Calendar management
Email management
Client file follow-up

3) Pre-accounting:

Management of accounting documents
Collection and sorting of invoices
Document verification
Expense reports
Scanning and archiving receipts
Tracking client payments
Verifying purchase order discrepancies
Preparing elements for accounting

A 30-minute discussion is enough to see how I can simplify your life.
  • French

    Native or bilingual

  • English

    Conversational

  • Spanish

    Basic

Remote only
Primarily works remotely

Experience

  • GRANT THORNTON
    ADMINISTRATIVE ASSISTANT
    August 2025 - January 2026 (5 months)
    Audit
    • • Formatting reports for employees and partners
    • • Formatting engagement letters for employees and partners
    • • Circularizing documents
    • • Sending and following up on correspondence
    • • Filing documents in the SP
    • • Processing emails via a generic mailbox
    • • Telephone switchboard

    Accounting/Consulting Expertise (internal management)
    • • Processing payroll and accounting invoices via CEGID and DYNAMICS 365
    • • Processing credit notes
    • • Formatting reports
    • • Formatting engagement letters
    • • Processing check deposits
    • • Filing documents via GED
    • • Validating invoices for payment via ESKER
    • • Account reconciliation
    • • Conflict check (conflict of interest)
    • • Preparing for partner signature via eDocsign for sending to clients: (Annual brochures / summary note / general orientation note)
    • • New client creation
    • • General ledger extraction
    Client Reception Document Formatting Planning Client Portfolio Management Mail Management
  • ENGIE
    ADMINISTRATIVE HR MANAGER
    January 2022 - October 2022 (9 months)
    • • Preparing end-of-contract documents
    • • Processing new hires and departures
    • • Handling email requests
    • • Managing BTP cards (all of France)
    • • Ordering BTP cards (all of France)
    • • Managing IJSS (French Social Security benefits)
    Administrative Assistance Filing and Archiving Order Management HR Management
  • TAUW FRANCE
    AGENCY ASSISTANT
    MECHANICAL ENGINEERING
    February 2022 - July 2025 (3 years and 5 months)
    France
    • • Handling the telephone switchboard (phone reception)
    • • Welcoming and assisting visitors
    • • Receiving and dispatching mail and deliveries
    • • Ordering supplies, checking stock, placing replenishment orders after validation by the Agency Director
    • • Booking hotels, trains, car rentals, organizing business travel
    • • Liaising with general services subcontractors (cleaning, photocopiers, etc.)
    • • Developing documents, materials, or meeting reports in compliance with the graphic charter
    • • Providing logistical support for local event organization
    • • Preparing invoices and advance payments as requested by Business Managers, Project Managers, and Design Engineers
    • • Preparing and tracking assigned files, filing and archiving them upon request.
    • • Participating in the administrative setup of tenders
    • • Monitoring and scheduling medical appointments for agency employees
    • • Ensuring the smooth operation of the agency
    • • Monitoring the vehicle fleet
    • • Preparing client and supplier purchase orders
    • • Tracking credit card purchases
    Order Management Mail Management Quotes and Invoicing Meeting Facilitation Report Writing

Reviews

5.0

Out of 2 ratings

B

Bénares

professionnelle§ - ATTIEKE LYONNAIS

Reviewed on 5/17/2026

Reiza was an exceptional support, fluid communication, understood my needs very quickly. Always efficient, she brilliantly managed the administrative follow-up of my project. I recommend without hesitation.....
A

Aprile

Top Maltesse - APRIL'S APERICHI'C

Several weeks project

-

Reviewed on 4/25/2026

Reiza was perfect on my mission, very structured. Mission completed in 2 days instead of 7, perfect, thank you very much, I highly recommend. Looking forward to working with you again.

Recommendations

BY
AG
Bénares Yao and 1 other person have recommended Reiza

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Education

  • BTS in SME-PMI Administrative Management
    PIGIER
    2017
    BTS ASSISTANTE DE GESTION PME-PMI
  • Bachelor's Degree in Human Resources Assistant
    ALTER PRO FORMATION
    2020
    ASSISTANTE RESSOURCES HUMAINES

Skill set

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