Tyisha Duncan
Accounts Payable Specialist
Houston,TX
Work Preference
Summary
Results-driven Accounts Payable Specialist with 22 years’ experience. A proven track record of improving efficiency in digital field ticketing, invoice processing and payments, as well as managing vendor master records successfully. Eager to contribute with a continuous improvement mindset, detail-oriented expertise, strong problem-solving skills, and a committed approach to drive operational excellence.
Overview
22
22
years of professional experience
Work History
Accounts Payable Supervisor/Operations AP Team Lead
Crescent Energy Operating, LLC
Houston, TX
09.2023 - 10.2025
- Worked as a Direct Hire on a hybrid schedule between Houston & Irving, TX for our Corporate operations.
- Problem-solved accounts payable questions on behalf of internal team members, management and vendors.
- Worked closely with department personnel to produce accurate and timely bills.
- Assessed data and information to check entries, calculations, and billing codes for accuracy.
- Reported to the Corporate AP Manager & assisted with leading & managing 18 Field Operations Administration team members located between North/South Texas & Utah.
- Processed & code-verified 200+ Coded & Non-Coded G&A/LOE/AFE/Contractor Utility Invoices, and Manual Payment Requests monthly.
- Utilized OpenTicket, OpenInvoice, SAP, FreshDesk email ticketing software, and Power BI & KPA reporting software.
- Developed, implemented, and maintained user-friendly, step-by-step procedures to all New & Existing Vendors with Invoicing/Billing/Contact Details needed for future field ticketing & invoicing in OpenTicket & OpenInvoice.
- Served as the AP Liaison between Field Operations & Vendors for OpenInvoice Registration training, enablements/connection, onboarding, and testing for ticketing & invoicing and go-lives.
- Developed, implemented and maintained OpenTicket & OpenInvoice ticketing and invoicing queues.
- Provided user-friendly procedures & was a reliable resource for vendors & team members.
- Company Merger & Acquisition contact, offering documented procedures, step-by-step guidance, and efficient invoicing & billing details to support all vendors for smooth welcome & transition to Crescent.
- Provided customer service & communication through email responses using Outlook and FreshDesk Ticketing System Software, addressing all vendor questions and inquiries.
- Overseen ticket assignments for the AP Team to facilitate collaboration among team members in handling all AP email inquiries & requests.
- Assisted in managing the accounts payable process, including the review and processing of invoices, extracting invoicing & supplier data reports to ensure timely payments, and resolving any issues related to ticketing, coding, or payment discrepancies.
- Duties include maintaining accurate vendor profiles, completing research & due diligence to resolve issues to minimize error found & payment delay.
- Work together with departments like LOE Production Operations, Drilling & Completions, Facilities, Geology, Workover, and Health Safety & Environmental to provide accounts payable support for field operations.
- Verified overdue service date invoices from vendors with an executed MSA and correct inaccurate field ticket & invoicing data.
- Identified and implemented process improvements to reduce manual work, shorten processing times, and enhance efficiency for timely vendor onboarding & data management, invoice processing & vendor payments.
- Supervised accounts payable team to ensure timely invoice processing.
- Reviewed vendor statements for accuracy and compliance with company policies.
- Implemented new software to streamline invoice matching and payment processes.
- Trained staff on best practices for handling accounts payable tasks.
- Coordinated with procurement and finance teams to resolve payment discrepancies.
- Conducted audits of accounts payable processes to ensure operational efficiency.
- Developed guidelines for expense report submissions and approvals.
- Responded promptly to inquiries from vendors regarding payment status.
- Analyzed financial data to identify potential areas of cost savings.
- Researched past due invoices.
- Processed payments to vendors via check or electronic transfer methods.
- Prepared weekly, monthly, quarterly, and annual financial reports.
- Performed account reconciliations to ensure accuracy of data entered into the system.
- Communicated and liaised with stakeholders, vendors, upper management, and peers.
- Implemented new software solutions designed to streamline Accounts Payable processes.
- Worked collaboratively with internal departments on resolution of invoice issues.
- Resolved supplier inquiries regarding payments or billing issues.
- Developed strategies for improving Accounts Payable operations efficiency.
- Provided training to other staff on Accounts Payable processes.
- Reviewed and approved invoices for accuracy, completeness, and proper authorization.
- Handled vendor invoice processing according to company policy.
- Reconciled vendor statements and resolved any discrepancies.
- Managed a team of Accounts Payable clerks responsible for processing invoices.
- Generated aging reports for review by management.
- Negotiated payment terms with vendors to maximize cash flow opportunities.
- Handled high-volume invoice processing with minimal supervision.
- Reconciled monthly statements and transactions to keep records accurate and current.
- Assisted with month-end and year-end closings to support accounting system accuracy.
- Prepared and updated vendor files, tax documents and insurance information.
- Applied mathematical skills to calculate totals, check figures, and correct problems with physical and digital files.
- Discussed job performance problems with employees, identifying causes and issues to find solutions.
- Consulted with managers to resolve problems relating to employee performance, office equipment and work schedules.
- Delegated work to staff, setting priorities and goals.
- Resolved customer complaints or answered customers' questions.
- Coordinated with other supervisors, combining group efforts to achieve goals.
- Trained employees on best practices and protocols while managing teams to maintain optimal productivity.
- Reviewed employees' work to check adherence to quality standards and proper procedures.
- Reviewed reports on employee attendance, productivity and effectiveness to evaluate performance.
- Developed work schedules according to budgets and workloads, covering priority tasks.
- Led team to optimize production workflows and enhance operational efficiency.
- Mentored junior staff on industry best practices and safety protocols.
- Implemented process improvements to reduce downtime and streamline operations.
- Facilitated training sessions to enhance team skills and knowledge sharing.
- Analyzed performance data to identify trends and recommend actionable solutions.
- Developed standard operating procedures to ensure consistency across tasks.
- Managed resource allocation to support project needs and operational demands.
- Provided leadership and guidance to team members, ensuring that tasks were completed on time and to a high standard.
- Trained new staff in relevant processes and procedures.
- Delegated daily tasks to team members to optimize group productivity.
- Resolved escalated customer complaints or queries promptly and efficiently.
- Assisted the manager in setting achievable goals for the team while monitoring progress towards them.
- Identified opportunities for process improvements, implementing changes when required.
- Motivated staff through positive reinforcement techniques.
- Supported the manager in developing plans for future projects, initiatives and objectives.
- Collaborated with management team to implement new work procedures or policies.
- Held regular one-on-one coaching sessions with staff members to encourage personal development.
- Collaborated with other departments to develop effective solutions that meet customer needs.
- Ensured compliance with industry standards and regulations.
- Offered training and support to keep team members motivated and working toward objectives.
- Resolved customer complaints and issues promptly, ensuring high levels of satisfaction.
- Championed the adoption of new technologies to improve team productivity and service delivery.
- Facilitated team meetings to discuss targets, strategies, and address any issues.
- Maintained positive working relationship with fellow staff and management.
- Identified needs of customers promptly and efficiently.
- Created plans to propose solutions to problems related to efficiency, costs or profits.
- Analyzed key performance indicators to identify effective strategies.
Accounts Payable Analyst
IKAV Energy, LLC
Houston, TX
07.2023 - 09.2023
- Worked as a Direct Hire in the Houston Office for the Durango, CO Operations directly under the supervision of the JIB Manager and Assistant Controller.
- Processed & code-verified 300+ Coded & Non-Coded G&A/LOE/AFE/Contractor Invoices monthly.
- Used OpenTicket, OpenInvoice, Excel, and W Energy Software.
- Completed Paid Invoice Reclassifications weekly.
- Collaborated with the Accounts Payable team members in handling all AP email inquiries and requests.
- Reviewed, coded, and verified invoices for Single-Well & Multi-Well PO/WOE/LOE/AFE.
- Processed vendor invoices and ensured timely payments to maintain positive relationships.
- Reconciled supplier statements and resolved discrepancies to ensure accurate records.
- Processed high volume of vendor invoices and payments in a timely manner.
- Researched, resolved and responded to inquiries from vendors regarding payments.
- Maintained accurate records of all transactions including purchase orders, invoices, credit memos.
- Assisted with month-end closing activities such as preparing journal entries, reconciliations and accruals.
- Reconciled accounts payable ledgers against general ledger accounts on a monthly basis.
- Recommended changes in existing practices or procedures based on knowledge gained from experience.
- Participated in special projects as assigned by supervisor or manager.
- Analyzed discrepancies between vendor statements and company records to identify errors or missing information.
- Collaborated with other departments such as Purchasing and Receiving in resolving invoice discrepancies.
Senior Accounts Payable Specialist
PetroLegacy Energy II, LLC
Cypress, TX
05.2022 - 07.2023
- On June 12, 2023, my company was acquired by Ovintiv Inc., and OpenInvoice was successfully transferred with no outstanding invoices to process.
- Served as a Direct Hire working remotely from home in Cypress for Austin, TX operations, reporting directly to the Controller and Assistant Controller while overseeing 1 AP Clerk.
- Used OpenInvoice, OpenTicket, and Enertia Software.
- Processed & code-verified monthly 500+ Coded & Non-Coded G&A/LOE/AFE/Legal/Contractor, Utility Invoices, JIB statements and Manual Payment Requests monthly.
- Assisted with the implementation of OpenTicket and completed Auto-Approved electronic field ticket review & approval before Invoice Submission into OpenInvoice.
- Managed OpenInvoice enablements, onboarding, testing for new invoicing go-lives, and maintained records for vendors for future invoices and payments.
- Reviewed MSAs daily to ensure Vendor Payments adhered to the Pay Terms specified in their Executed Agreement.
- Provided weekly invoice payment status updates, conducted statement research, and performed troubleshooting to identify, resolve, and prevent any payment issues.
- Led the AFE Reopen Process by tracking invoices for closed AFEs, completing manager approvals, and posting held invoices.
- Produced a weekly report of Unapproved Invoices & Electronic Field Tickets from OpenInvoice/OpenTicket to aid Managers in Payment Forecasting & Accruals.
- Reviewed and resolved rejected invoice issues post-sync from OpenInvoice to Enertia.
- Conducted the weekly pay run, reviewed and posted payment batches, and generated the check register and payment recap for managerial review of all pending payments.
- Generated Positive Pay File for checks and EDI File for ACH payments to be sent to the bank by controllers.
- Printed checks in-house for quick payments to both check payment and land vendors.
- Sent and maintained Remittance Advices to all ACH Payment Vendors to assist with accurate payment application after receipt.
- Assist in monthly closing activities related to accounts payable functions.
- Manage vendor communications regarding payment inquiries and issues.
- Collaborate with internal teams to streamline payment processes.
- Train junior staff on best practices for accounts payable procedures.
- Implement improvements to enhance efficiency in invoice processing workflows.
- Researched any invoice or payment discrepancies in order to resolve issues quickly.
- Prepared weekly check runs for multiple entities.
- Researched and resolved vendor inquiries in a timely manner.
- Monitored accounts payable aging reports to ensure timely payment of all invoices due.
- Review and resolve discrepancies in accounts payable transactions.
- Generated periodic financial reports for management review.
- Performed special projects as assigned by Accounts Payable Manager or Controller.
- Reconciled supplier accounts on a regular basis to ensure accuracy of financial records.
- Maintained accurate records of transactions using an electronic document management system.
Senior Accounts Payable Clerk
EAG OneSource
Houston, TX
05.2020 - 04.2022
- Provided Consulting Accounts Payable Services as a Direct Hire, both in Downtown Houston and remotely from home.
- Used OpenInvoice, BOLO, W Energy, M-Files, Power Automate, PowerBI, Smartsheet, and ConnectWise Ticketing software.
- Primarily managed the payables process for 10-separate Oil & Gas Companies (including Crescent Energy) who became EAG Clients that outsourced their Accounting/Treasury/Land/IT Operations to EAG OneSource due to the impacts of COVID and other factors.
- Processed & code-verified monthly over 2,000+ Coded & Non-Coded G&A/LOE/AFE/Legal/Contractor, Utility Invoices, JIB statements and Credit Card payments, and Manual Check & ACH Payment request invoices.
- Provided training to the Accounts Payable Team on both new and existing procedures and developed comprehensive documentation for AP Training.
- Streamlined processes, automated tasks, and developed improvements to enhance invoice accuracy and reduce processing time for our AP team.
- Provided weekly payment status updates, conducted research, and implemented troubleshooting measures to identify, resolve, and prevent any payment issues.
- Managed and maintained records for new and current vendors, employees, contractors, credit applications, and tax-exempt certificate requests for future invoicing and payments.
- Provided weekly payment updates, conducted research, and resolved payment issues.
- Successfully executed a timely weekly pay run, created multiple accounts payable aging reports, and generated check registers for various clients' pay runs using AP automation.
- Collaborated with the Treasury Team to ensure successful payments to each vendor via ACH, check, or credit card.
- Sent remittance advice to all ACH/Credit Card payment vendors for accurate payment application after receipt.
Accounts Payable Analyst
Sirius Solutions LLLP
Houston, TX
12.2019 - 05.2020
- Worked as Contractor in the Galleria area of Houston.
- Utilized OGSYS & DocVue software.
- Processed & code-verified monthly 1,200+ Coded & Non-Coded G&A/LOE/AFE Invoices for Lime Rock Resources who outsourced their Accounts Payable Process to Sirius Solutions.
Accounts Payable Associate
Rockcliff Energy, LLC
Houston, TX
01.2018 - 11.2019
- Worked as a Direct Hire in Downtown Houston.
- Utilized BOLO, DocVue, and SmartVue software.
- Processed & code-verified monthly 1,200+ Coded & Non-Coded G&A/LOE/AFE/Legal Invoices.
- Provided weekly payment status, completed research, and troubleshooting to identify & resolve/prevent any payment issues.
- Developed Coding Templates that assisted in improving Invoice accuracy & processing time.
Accounting Assistant /Accounts Payable Specialist, Contractor
TH1, LLC @ Cobalt International Energy
Houston, TX
05.2015 - 01.2018
- Worked as Contractor in the Memorial City area of Houston.
- Utilized Quorum Business Solutions & Concur Travel & Expense software.
- Processed, code-verified, and scanned monthly 1,500+ Invoices G&A/LOE/AFE/Legal/Tax/Utility for the US, Mexico, and Angola Vendors.
- Managed Credit Card Payments, Expense Reports Reimbursements, and Pre-Approved Payment Requests.
- Created & maintained records for New/Current Vendors, Employees, and Contractors for future Invoicing & Payments.
- Monitored & managed all New & Existing Supplier requests that were submitted weekly to Supply Chain Team.
- In 2016, I led a project to update all the Master Data Records in Cobalt’s system. Also, helped to deactivate all customer/vendor records with no business/payment activity for 2 years with Cobalt.
Accounts Payable Specialist/Vendor Master Coordinator
Rowan Companies PLC
Houston, TX
05.2008 - 05.2015
- Worked as a Direct Hire in the Galleria area of Houston.
- Utilized SAP ERP, Concur Travel & Expense & ServiceNow Ticketing software.
- Processed, code-verified, and scanned monthly 1,500+ Invoices G&A/LOE/AFE/Legal/Tax Invoices, Expense Reports Reimbursements, and Pre-Approved Payment Requests for the US, UK, Singapore, and Malaysia.
- Provided weekly payment status, completed research, and troubleshooting to identify & resolve/prevent any payment issues.
- Created & maintained records for New/Current Vendors and Contractors for future Invoicing & Payments.
- Monitored & managed all New & Existing Supplier requests that were submitted weekly to Supply Chain Team.
- Developed relationships with vendors and suppliers to ensure prompt payment of invoices.
- Answered inquiries from internal departments regarding accounts payable status.
- Reconciled vendor statements on a monthly basis.
- Managed multiple projects simultaneously while meeting deadlines consistently.
- Prepared and updated vendor files, tax documents and insurance information.
- Prepared 1099 forms at the end of each fiscal year as required by law.
- Processed employee expense reimbursements according to company policy guidelines.
- Implemented process improvements to enhance vendor performance and efficiency.
- Maintained accurate records of all vendors and their contracts.
- Managed day-to-day communications with multiple vendors simultaneously.
- Performed periodic audits of vendors' activities to ensure contractual obligations were met.
- Facilitated payment processes for approved invoices from vendors.
- Tracked contract renewals, expirations, amendments, and terminations.
- Collaborated with cross-functional teams to ensure successful execution of vendor projects.
- Identified opportunities for process improvements within the vendor management program.
- Monitored vendor performance against contracted service level agreements.
- Developed and implemented strategies for vendor onboarding, training, and performance management.
Accounts Payable Specialist, Contractor
ChaseCom, LP @ Shell Oil
Houston, TX
08.2004 - 05.2008
- Worked as Contractor in Downtown Houston.
- Utilized SAP ERP software.
- Processed, code-verified, and scanned monthly 1,500+ PO & Non-PO Invoices weekly for the Freight & Chemical Departments.
- Provided weekly payment status, completed research, and troubleshooting to identify & resolve/prevent any payment issues.
- Organized and labeled digital files for easy retrieval by team members.
- Operated scanning equipment to digitize documents and maintain accurate records.
- Collaborated with team members to streamline document processing workflows.
- Trained new staff on scanning procedures and equipment usage.
- Maintained equipment by conducting regular checks and troubleshooting issues.
- Communicated effectively with colleagues to resolve scanning discrepancies promptly.
- Reviewed electronically scanned document images to verify accuracy.
- Processed large volumes of incoming documents in a timely manner while ensuring accuracy standards were met.
- Batched, sorted and imported electronic files into software.
- Organized and stored scanned documents in designated electronic folders.
- Trained new employees on the correct use of scanners, imaging software programs.
Education
Cosmetology License - Cosemetology
Behold Beauty Academy
Houston, TX05.1999
High School -
M.B. Smiley High School
Houston, TXBachelor's Degree - Political Science
Dillard University
New Orleans, LASkills
- Invoice processing
- Vendor management
- Data analysis
- Payment reconciliation
- Software implementation
- Accounts payable compliance
- Project coordination
- Process improvement
- Team leadership
- Problem solving
- Detail-oriented approach
- Training and mentoring
- Customer service
- Issue escalation
- Expense tracking
- Tax compliance
- Team supervision
- Workflow management
- Auditing
- General ledger maintenance
- ERP systems expertise
- Sarbanes-oxley compliance
- Accounts payable
- Proficient in OpenInvoice
- Vendor relationship management
- Problem resolution
- Statement reconciliation
- Payment processing
Work References
Available Upon Request
Accomplishments
- In Sept 2025, ENVERUS provided our Crescent AP Team with Invoicing Metrics showing 90% of Supplier Invoicing was paperless & vendor accounts were successfully enabled to the Crescent OpenInvoice portal.
- On June 12, 2023, my company PetroLegacy Energy II, LLC was acquired by Ovintiv Inc., and our OpenTicket & OpenInvoice portals were successfully transferred with no outstanding tickets & invoices to process.
Work Availability
monday
tuesday
wednesday
thursday
friday
saturday
sunday
morning
afternoon
evening
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Timeline
Accounts Payable Supervisor/Operations AP Team Lead
Crescent Energy Operating, LLC
09.2023 - 10.2025
Accounts Payable Analyst
IKAV Energy, LLC
07.2023 - 09.2023
Senior Accounts Payable Specialist
PetroLegacy Energy II, LLC
05.2022 - 07.2023
Senior Accounts Payable Clerk
EAG OneSource
05.2020 - 04.2022
Accounts Payable Analyst
Sirius Solutions LLLP
12.2019 - 05.2020
Accounts Payable Associate
Rockcliff Energy, LLC
01.2018 - 11.2019
Accounting Assistant /Accounts Payable Specialist, Contractor
TH1, LLC @ Cobalt International Energy
05.2015 - 01.2018
Accounts Payable Specialist/Vendor Master Coordinator
Rowan Companies PLC
05.2008 - 05.2015
Accounts Payable Specialist, Contractor
ChaseCom, LP @ Shell Oil
08.2004 - 05.2008
Cosmetology License - Cosemetology
Behold Beauty Academy
High School -
M.B. Smiley High School
Bachelor's Degree - Political Science
Dillard University