CBIZ is the eighth largest accounting firms in the U.S. It has offices in most major metropolitan areas and suburban cities in the country and provides a wide range of accounting services, including audit and assurance, financial statement audits, and employee benefit plan audits. It also provides a range of attest services and systems and organization control assessment services. Recently, CBIZ acquired the NYC-based accounting firm, Marcum, creating a firm with more than 9,800 team members and nearly $3 billion in annual revenue.