Master Data Administrator

INSIDE SOURCE INC.•San Francisco, CA

1d•$70,000 - $85,000

About The Position

The Master Management Administrator is a critical operational role responsible for ensuring the accuracy, completeness, and consistency of all client and vendor data across our business systems. This position manages the onboarding process for both clients and vendor partners, supports vendor operations capabilities (such as EDI and digital tools), and maintains all related documentation, terms, discounting, and communication channels. This role directly supports the sales, finance, procurement, and vendor relations teams to ensure operational excellence and a seamless flow of information.

Requirements

Strong attention to detail with a high level of accuracy in data entry and documentation
Experience managing data across systems (ERP, CRM, or similar)
Highly organized with the ability to manage multiple workflows at once
Proficiency in Microsoft Excel (basic formulas, tracking, organization)
Strong communication skills and ability to collaborate cross-functionally
Ability to identify discrepancies and resolve data issues proactively
Experience with vendor onboarding processes, vendor coordination, or procurement
Self-starter with strong ownership and follow-through

Responsibilities

Manage the full lifecycle of onboarding forms for clients and vendors, including sending, receiving, tracking, and ensuring complete and accurate submission.
Review onboarding documents for accuracy and completeness prior to internal handoff.
Partner with Sales and Finance to confirm any special terms, trade programs and/or discount structures for contract, retail ancillary and online retail vendors.
Enter new client and vendor information in the company’s business operating system, ensuring alignment with naming conventions, coding, and system rules.
Maintain and update ongoing data changes including: Billing and shipping addresses Contacts and communication preferences Credit terms Tariffs or other fees Discount levels or contract pricing W-9 and compliance documentation
Maintain vendor profiles within internal digital tools and communication systems.
Track updates on pricing, lead times, discontinued products, and operational changes; proactively communicate updates to internal teams.
Routinely audit data for accuracy and proactively correct discrepancies.
Manage and maintain online retail vendor portal log in lists
Support vendor operations initiatives including monitoring, documenting, and improving processes such as, but not limited to, Electronic Ordering capabilities and Vendor Portal access.
Collaborate with procurement, finance, and other internal teams to identify process improvements in vendor operations.
Assist in collecting, consolidating, and formatting vendors spend data for quarterly and annual reviews.
Exemplify Insidesource values of Team First, Client Led, Change Makers, Experience Focused.
Participate in All Company Meetings and Regional Town Halls.
Embody diversity, equity, and inclusion in our Insider community and business practices.