Finance & Accounting Manager - AR/AP, Analytics, Contracts

Maria Isabel Celeste

Little Elm, TX *****

972-***-**** **************@*****.***

Professional Summary

Finance and Accounting Manager with 15+ years of experience in accounts payable, accounts receivable, financial analytics, and contract administration. Skilled in processing high volume invoices, reconciling vendor statements, and supporting audits. Holds DHS/FEMA security clearance and bilingual in English and Spanish. Recognized for accuracy, efficiency, and strong vendor and client relations across corporate and government environments.

Core Competencies

Finance & Accounting Operations

Accounts Payable (AP) & Accounts Receivable (AR)

General Ledger & Journal Entries

Financial Analytics & P&L Reporting

Contract Administration & Pricing Validation

Customer Service & Vendor Relations

Project Management & Audit Support

Technical Proficiencies

SAP (SD/HANA/S4/Ariba), Esker, McKesson, JD Edwards, Data Plus, Kronos Oracle, QuickBooks, SharePoint, Concur, FFMS, Travel Manager, AutoPay, RMMS, Meditech, Siebel, Imaging/Scanning tools, Microsoft Office Suite (Excel, Access, PowerPoint, Word), Windows Applications.

Professional Experience

Volunteer & Online SAP Training

Jun 2025 – Present

Volunteering in community initiatives while completing online SAP coursework.

Expanding technical proficiency in SAP S4/HANA and ERP modules.

Accounting Operation Coordinator – Industry Specialist

Pepsico / Frito Lay Division – Plano, TX Jan 2024 – Jun 2025

Managed A/R for big box accounts using S4 software.

Ensured compliance with customer master data entry standards.

Created KPI and periodic reports for sales orders and purchase orders.

Supported customer and division initiatives, achieving departmental metrics.

Finance Coordinator – Food for Good

Pepsico / Frito Lay Division – Plano, TX Jun 2020 – Jan 2024

Provided financial analytics and support for Purchasing/Buyers.

Built P&Ls for innovation projects and led leadership reviews.

Oversaw payables, warehouse meal packing activities, and auditing solutions.

Monitored A&M budget, forecast, and spend in collaboration with FP&A, Purchasing, and Marketing.

Industry Specialist Lease Specialist / Disbursements Analyst

Sunoco / Energy Transfer Partner – Dallas, TX Jun 2016 – May 2020

Managed cash disbursements including wires, ACH, manual checks, and automated runs.

Resolved complex disbursement issues and supported treasury operations.

Assisted with quarterly and annual audits.

Collaborated with AP, Treasury, Tax, Legal, HR, and business owners to ensure liquidity.

Contract Pricing Specialist (Contract)

Sabre Air Solution – Southlake, TX Apr 2016 – May 2016

Reviewed contract obligations and pricing.

Entered contract data into SAP for master agreements and addendums.

Validated contract financials in SAP.

Accounts Payable (Contract)

Aimbridge Hospitality – Dallas, TX May 2015 – Apr 2016

Processed 700–1200 invoices in Data Plus.

Managed full cycle AP across two accounting systems.

Career Break – Seeking New Opportunity Jan 2015 – May 2015

Refund Coordinator (Contract)

21st Century Oncology – Ft. Myers, FL Nov 2014 – Jan 2015

Managed insurance aging reports and followed up with insurers.

Researched and re filed claims to maximize payment.

Recorded collection efforts and maintained correspondence.

Accounts Payable Specialist

Dr Pepper / Snapple – Plano, TX Jul 2013 – Sep 2014

Processed 60–100 invoices daily (PO/Non PO, 2/3 way matching).

Reconciled vendor statements and maintained SharePoint inquiries.

Supported domestic and international vendor relations.

Accounts Payable Specialist (Contract)

Christus Health – Irving, TX Jul 2013 – Dec 2013

Processed 400–600 invoices daily and 500 physician payments.

Uploaded invoices for 20 regional locations via imaging.

Reconciled payments and corrected journal entries.

Sr. Accounts Payable Specialist

Waste Management – Lewisville, TX Mar 2009 – Jul 2013

Reviewed and coded invoices, ensuring accuracy with purchase orders.

Processed manual and computer generated checks.

Produced month end reports and reconciled with general ledger accounts.

Oversaw invoice filing and assisted with journal entries.

Relocation – Moved Back to Texas Jul 2008 – Mar 2009

Contract Specialist (Security Clearance)

Department of Homeland Security / FEMA – Denton, TX Jan 2008 – Jul 2008

Conducted market research, solicited proposals, and negotiated contracts.

Managed contract administration, modifications, and closeouts.

Assisted in developing statements of work and procurement strategies.

Contract Staff Accountant / Team Leader (Secret Clearance)

Federal Management Systems: DHS/ICE – Dallas, TX May 2000 – Nov 2007

Managed government payment sections including purchase orders, travel, contracts, and settlements.

Processed AP/AR, reconciliations, and audits.

Prepared monthly, quarterly, and annual reports for federal agencies.

Monitored contract agreements and ensured compliance.

Education

Dallas Community College – Dallas, TX

Accounting, Bookkeeping, Budget Finance, Business Administration

North Texas (American Institute of Banking) – Dallas, TX

Banking Principles

Defense Acquisition University – Dallas, TX

Contracting Officer Representative with Mission Focus

Mission Support Planning

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