Meet The William Stanley Group

Brittney Mack joined The William Stanley Group in January 2026, bringing more than a decade of experience across accounting operations, financial systems integration, and multi-entity reporting. A highly capable and adaptable accounting professional, Brittney supports the firm’s clients and internal teams with precision, consistency, and strong operational judgment.

Throughout her career, Brittney has managed full-cycle accounting responsibilities including accounts payable and receivable, reconciliations, monthly close, financial reporting, and sales tax compliance. She has extensive experience working across platforms such as QuickBooks (Online, Desktop, and Enterprise), NetSuite, SAP, and other ERP systems, and is particularly skilled in integrating accounting systems with point-of-sale and operational tools to ensure accurate, reliable financial data.

Prior to joining the firm, Brittney served in accounting and integration roles supporting multi-location and franchise-based businesses. In these positions, she trained teams on accounting systems, implemented cross-platform integrations, standardized processes across locations, and supported year-end close, audits, and tax preparation. Her background also includes experience supporting individual and business tax returns, providing multi-state sales tax compliance, and coordinating closely with senior tax professionals.

Brittney holds a Bachelor of Science in Accounting from the University of Tampa and an Associate of Arts degree from St. Petersburg College. She is well-versed in GAAP and IFRS standards and is known for her attention to detail, problem-solving ability, and steady approach to complex accounting and reporting challenges.

At The William Stanley Group, Brittney is valued for her reliability, technical competence, and disciplined execution — bringing clarity, structure, and consistency to the firm’s accounting and client service work.