Established in 1959, Rothstein Kass is an accounting firm that provides professional, technical, consulting and business services. Its certified public accountants specialize in offering tax, consulting, auditing and financial planning services. The firm represents the nonprofit, technology, transportation, hospitality, automobile, manufacturing, financial, real estate, and sports and entertainment sectors. It provides due diligence, tax planning, and management and corporate advisory services. The firm assists clients in matters related to employee benefits plan and mergers and acquisitions, as well as offers litigation support and forensic accounting services. Rothstein Kass is certified by the Public Company Accounting Oversight Board and is a member of the Center for Public Company Audit Firms and the American Institute of Certified Public Accountants. The firm is affiliated with AGN International, an association of independent accounting and consulting firms. Rothstein Kass employs more than 850 staff members in over eight offices throughout the United States. It maintains a location in Walnut Creek, Calif.