Jack O'Halloran
Chicago
Summary
As a dedicated accounting professional with over four years of experience in financial reporting, reconciliations, and managing high-volume accounts payable and receivable, I bring a strong analytical mindset and a commitment to accuracy in financial operations. My expertise includes performing complex account reconciliations, ensuring compliance with internal controls, and contributing to the preparation of financial statements. Additionally, I have a proven ability to identify and implement process improvements to enhance efficiency and reduce errors. I am seeking a Senior Financial Specialist role where I can leverage my staff accountant background and reconciliation expertise to drive financial accuracy, support decision-making, and contribute to organizational success.
Overview
4
4
years of professional experience
Work History
Advanced Billing Specialist
General Dynamics Mission Systems
Marion
06.2024 - Current
- Oversaw end-to-end government invoicing for federal contracts, ensuring compliance with FAR and agency-specific requirements.
- Coordinated with internal teams to reconcile accounts, support revenue recognition, and streamline AR processes.
- Submitted and tracked invoices through government portals, resolving discrepancies to maintain cash flow and client satisfaction.
- Prepared AR schedules and documentation to support audits, month-end close, and internal reporting.
- Identified and implemented process improvements to enhance billing accuracy and efficiency.
- Filed and maintained compliance with multi-state sales and use tax requirements.
- Trained and onboarded new hires on AR process, government billing systems, and internal controls.
Staff Accountant
The Options Clearing Corporation
Chicago
12.2020 - 03.2023
- Managed accounts receivable process, billing over $100m monthly.
- Led billing efforts for all major options exchanges, managing the monthly billing process within a tight deadline.
- Reconciled and remitted payments to the SEC bi-annually, ensuring compliance with all regulatory requirements.
- Managed high-volume accounts payable process, averaging 400-500 invoices per month.
- Tested and assisted with the development of accounting procedures and internal controls, contributing to the overall efficiency and effectiveness of the accounting function.
- Booked, reconciled, and reported on daily cash balances, ensuring accurate and up-to-date records of cash transactions.
- Involved in the Fixed Asset subledger; reconciled and posted new FAs.
- Assisted with annual and interim audits, including preparing schedules and responding to auditor inquiries.
- Supported the reporting and filing of sales and use tax, ensuring compliance with all applicable tax laws and regulations.
- Undertook various ad hoc projects and requests, demonstrating flexibility and a willingness to take on new challenges.
- Developed and maintained trackers to ensure timely payment of rent, lease, and utility expenses, reducing the risk of late payments or missed deadlines.
- Reconciled general ledger accounts and identified and resolved discrepancies, ensuring the accuracy of financial statements.
- Completed Six Sigma training to better identify and execute process improvements.
Education
Bachelor of Science (B.S.) - Accountancy
Purdue University
05.2020
Skills
- Microsoft Excel
- Oracle ERP
- Workday ERP
- QuickBooks
- Power BI
- Excellent Written/Verbal skils
- Thrive Under Pressure
- Highly Adaptable
- Focus for successful business practices
- Analytical
- Collaborative Team Player
- Curiosity
- Government invoicing
- Regulatory compliance
- Financial reporting
- Sales tax compliance
- Month-end close
- Understanding of GAAP
- Financial statement preparation
- AR/AP expertise
- Audit
Additional Background
- Alumni of Psi Upsilon Fraternity, involved in various philanthropic activities.
- Avid reader of non-fiction literature, with a keen interest in topics such as history, psychology, finance and personal development.
- Passionate traveler with experience exploring diverse cultures and engaging with local communities.
- Strong family values and close ties with a large family (60+ first cousins), fostering a sense of responsibility and teamwork.
- Attended La Lumiere School, an institution founded on the principles of character, scholarship, and faith, and renowned for its rigorous academic programs and commitment to developing well-rounded individuals.
Timeline
Advanced Billing Specialist
General Dynamics Mission Systems
06.2024 - Current
Staff Accountant
The Options Clearing Corporation
12.2020 - 03.2023
Bachelor of Science (B.S.) - Accountancy
Purdue University
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