E. Cohen
AccountingMaryland, United States51-200 Employees
Marcum LLP is an accounting and advisory firm based in Rockville, Maryland. It provides an integrated suite of tax, assurance, and consulting services to individuals and a broad set of Mid-Atlantic industries, including construction, government contracting, hospitality, nonprofits, professional services, real estate, and wholesale distributors. With more than 30 years in operation, the firm serves middle-market clients and extends its capabilities into technology, cybersecurity, and wealth planning. Effective December 1, the practice formerly known as E. Cohen and Company CPAs operates under the Marcum LLP name. Forbes has named it among America's Top Recommended Tax and Accounting Firms for 2020 through 2022, and Accounting Today and Best Companies Group have recognized it as a top workplace for many years, including the No. 1 Best Firm for Women in 2019. In 2026, Commodore Construction Corp. filed a lawsuit in Westchester Supreme Court against Marcum LLP and CBIZ CPAs, seeking damages related to financial statements.