ABOUT US
Based in Northern Virginia, we are a trusted accounting and bookkeeping firm for general contractors, real estate investors, and business owners who value clarity and reliability. We specialize in QuickBooks Online and provide full-service bookkeeping solutions that keep your finances organized, accurate, and easy to understand.
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Our approach is built on clarity, communication, and consistency. We don’t just manage your books, we support your growth with transparent reporting, proactive guidance, and responsive service you can depend on. With us, you gain more than a bookkeeper, you gain a financial partner committed to helping your business operate smarter and succeed with confidence.
Our goal is simple - keep your books clean, your financials accurate, and give business owners the financial confidence they need to make smart decisions.
Meet Elmer Sejas
After completing his bachelors in Finance and Accounting at George Mason University, Elmer began his career in public accounting at a local tax firm before moving into corporate finance and accounting roles. Over the course of a decade, he gained valuable experience working across multiple business environments, deepening his expertise in financial reporting, budgeting, and operational efficiency.
Guided by an entrepreneurial mindset and a desire to support business owners directly, Elmer founded OneFirm Accounting with a mission to serve small businesses and entrepreneurs through modern, efficient, and reliable accounting solutions tailored to real business needs.
CEO & Principal Accountant
