Summary
Overview
Work History
Education
Skills
Timeline
Generic

Sandra Castillo

Stockton,CA

Summary

Experienced operations manager with a strong background in financial management, payroll processing, and administrative operations within educational and service driven organizations. Known for streamlining processes, enhancing efficiency, and ensuring regulatory compliance across various departments and locations. Detail oriented and results driven professional with over a decade of proven expertise in driving operational excellence.

Overview

12
12
years of professional experience

Work History

Operations Manager

Transformational Education Inc
10.2018 - Current
  • Lead operations across multiple charter school sites, aligning daily functions with strategic goals.
  • Process bi-weekly payroll for 165+ employees via Paycom, including audits, tax compliance, and W-2 distribution.
  • Refine and streamline systems for cost savings and enhanced staff productivity.
  • Oversee procurement, vendor contracts, and inventory management.
  • Assist in school budget development and financial planning through internal reporting and expense reconciliation.
  • Maintain regulatory compliance by preparing audit-ready documentation and financial reports.
  • Manage food service operations including staffing, audits, and fiscal oversight.
  • Train support staff in behavior management and lead professional development initiatives.
  • Collaborate with HR to ensure accurate employee data integration and issue resolution.
  • Serve as key leadership team member handling crisis response and family/staff communication.
  • Managed inventory and supply chain operations to achieve timely and accurate delivery of goods and services.

Payable Clerk

Creative Child Care Inc
05.2018 - 10.2018
  • Scheduled and processed vendor payments, resolving discrepancies across 12 sites.
  • Reconciled credit memos, vendor statements, and account balances.
  • Maintained organized, audit-ready records and documentation.
  • Managed ACH/EFT transactions and posted journal entries for expense tracking.

Accounts Payable Clerk

Paul Blanco Good Car Company
02.2013 - 05.2018
  • Reconciled monthly vendor statements and managed check runs for 100+ vendors.
  • Processed reimbursements, refunds, and vendor payments with strong documentation.
  • Maintained invoice and contract records, activated customer policies, and processed warranty refunds.
  • Utilized spreadsheets and ERA systems for financial tracking and reporting.

Education

Bachelor of Science - Business Administration

California State University, Stanislaus
Turlock, CA
01-2025

Associate of Science - Business Administration

San Joaquin Delta College
Stockton, CA
05.2022

Associate of Science - Accounting

San Joaquin Delta College
Stockton, CA
05-2022

Skills

  • Payroll & Timekeeping (Paycom)
  • Budget Management & Forecasting
  • Accounts Payable/Receivable
  • Audit Preparation & Compliance
  • Procurement & Inventory Oversight
  • Staff Supervision & Training
  • Financial Reporting & Reconciliation
  • Microsoft Office Suite, Excel, Google Workspace
  • ERP & Financial Systems (ERA, Paycom)
  • Regulatory & Charter School Compliance
  • Data analysis

Timeline

Operations Manager

Transformational Education Inc
10.2018 - Current

Payable Clerk

Creative Child Care Inc
05.2018 - 10.2018

Accounts Payable Clerk

Paul Blanco Good Car Company
02.2013 - 05.2018

Bachelor of Science - Business Administration

California State University, Stanislaus

Associate of Science - Business Administration

San Joaquin Delta College

Associate of Science - Accounting

San Joaquin Delta College

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