We ran payroll for the Fortune 500. Now we run it for our neighbors.
Expert bookkeeping and payroll for West Contra Costa from Hercules.

Our Story
Global Expert Systems (GES) is a Hercules-based financial operations company serving small businesses throughout West Contra Costa and the Bay Area. Our team brings years of experience from structured corporate finance and payroll environments to the local business community. We transitioned from large-scale operations to focus on providing small businesses with the same level of organized, professional financial support we delivered throughout our careers.
Why We Started GES
We started GES to provide local business owners with clearer books and more organized payroll support. Our goal is to offer practical help that keeps your records organized and ready for your tax professional, allowing you to focus on running your business with confidence in your numbers.
How We Work
We focus on understanding your specific business workflows to set up or clean up your bookkeeping and payroll processes properly. We provide understandable reports and coordinate directly with your existing CPA or tax professional to ensure a seamless flow of accurate information.
Our Five Core Services
Monthly Bookkeeping
Ongoing management to keep your business records accurate and up-to-date.
Bookkeeping Cleanup & Catch-Up
Organizing historical records and resolving discrepancies to provide a clean financial slate.
Payroll Administration Support
Structured assistance for reliable payroll processing and record maintenance.
Tax-Ready Bookkeeping & Tax Coordination
Ensuring all records meet the requirements of your tax professional for efficient filing.
QuickBooks Setup & Training
Establishing your system correctly and teaching your team how to maintain it.
Our Commitments
- Clear scope
- Predictable communication
- Plain-English reporting
- Responsible handling of business information
- No invented credentials or guarantees