Oscar Membreno
Santa Ana,CA
Summary
Strategic financial professional with a proven track record driving organizational growth, financial stability, and operational excellence across complex nonprofit operations. Expertise in multi-year forecasting, cash-flow management, internal controls, and department-level performance analysis. Recognized for elevating financial reporting standards, strengthening compliance frameworks, and collaborating closely with C-suite leaders to inform high-impact decisions. Adept at leading and developing finance teams, optimizing processes, and building systems that support long-term sustainability.
Overview
12
12
years of professional experience
Work History
Notary Public
Orange County
12.2023 - Current
- Provided compliant notarial services for legal and financial documentation, supporting organizational integrity and risk management.
- Ensured 100% error-free identity verification and documentation processing, safeguarding sensitive financial transactions.
- Maintained accurate notarial records in accordance with California regulations, ensuring audit readiness and transparency.
Financial Controller
Merage Jewish Community Center of Orange County
11.2018 - Current
- Directed financial operations for a $20M+ nonprofit, providing executive leadership with accurate forecasting, budget modeling, and strategic insights that shaped organizational priorities.
- Designed and managed annual budgeting processes for 20+ departments, improving accuracy and accountability through enhanced templates, controls, and director training.
- Overhauled financial review communications, creating standardized monthly reports for every department, including revenue trends, YTD performance, and corrective-action summaries.
- Manage and mentor a finance team of five (AP, AR, Payroll, and Accountants), implementing structured training programs, cross-training systems, and performance-development paths
- Partnered with department directors to improve program profitability through margin analysis, cost restructuring, and real-time performance dashboards.
- Co-led financial planning for multimillion-dollar capital projects, including locker room renovations, vehicle acquisitions, and infrastructure improvements.
Accounts Payable Clerk
PIB Law
10.2017 - 11.2018
- Processed 100+ vendor invoices weekly, ensuring accuracy, proper coding, and compliance with firm policies prior to payment.
- Assisted with month-end closing, reconciling payables and ensuring all invoices were captured on time to support accurate financial statements.
- Prepared vendor payments, managed check runs, and maintained detailed AP records to ensure a clean audit trail.
- Resolved invoice discrepancies by coordinating with vendors and internal departments, reducing payment delays and improving workflow efficiency.
- Monitored outstanding payables and provided weekly aging reports, giving management clear visibility into cash requirements.
- Demonstrated reliability during high-volume periods by maintaining 100% on-time processing and meeting tight deadlines without errors.
Night Auditor
Hyatt Hotels Corp
08.2016 - 11.2017
- Reconciled and closed 100–150+ daily hotel transactions each night, ensuring accuracy in guest folios, room charges, taxes, and payment postings.
- Conducted nightly audits of financial activity and resolved discrepancies, maintaining a 100% error-free record for end-of-day reporting.
- Generated revenue, occupancy, and financial summary reports used by management to guide daily operations and forecasting.
- Troubleshot reservation and billing system issues, preventing delays and ensuring uninterrupted guest service.
- Coordinated overnight staffing and task delegation, ensuring smooth shift operations while keeping labor costs aligned with budget.
- Responded to guest inquiries and handled escalated concerns during overnight hours with professionalism and efficiency.
Billing Clerk
Hollins Law Group
01.2014 - 10.2017
- Processed 150–200 client invoices per month with a 99% accuracy rate, ensuring timely billing and prompt payment collection.
- Maintained detailed records of all billing transactions, client communications, and adjustments, supporting clear audit trails and internal controls.
- Reviewed billing statements for accuracy and resolved discrepancies by coordinating with attorneys, paralegals, and clients.
- Assisted with account reconciliations and month-end reporting, improving billing cycle efficiency and reducing outstanding receivables.
- Collaborated with the accounting team to implement updated billing procedures, reducing processing errors and improving workflow consistency.
Education
Associate of Science - Liberal Arts And Sciences/Liberal Studies
Santiago Canyon College
Orange, CAGraduate Certificate - Accounting
University of California, Irvine
Irvine, CAGraduate Certificate - Non-Profit Management
University of California, Irvine
Irvine, CASkills
- Mobile notary services
- Internal controls
- Cash flow management
- GAAP
- Audit coordination
- Financial policies
- Preparing financial statements
- Financial statement review
- Staff management
- Audit preparation
Languages
Spanish
Full Professional
Timeline
Notary Public
Orange County
12.2023 - Current
Financial Controller
Merage Jewish Community Center of Orange County
11.2018 - Current
Accounts Payable Clerk
PIB Law
10.2017 - 11.2018
Night Auditor
Hyatt Hotels Corp
08.2016 - 11.2017
Billing Clerk
Hollins Law Group
01.2014 - 10.2017
Associate of Science - Liberal Arts And Sciences/Liberal Studies
Santiago Canyon College
Graduate Certificate - Accounting
University of California, Irvine
Graduate Certificate - Non-Profit Management
University of California, Irvine