CBRE Group, Inc., a Fortune 500 and S&P 500 company headquartered in Los Angeles, is the worlds largest commercial real estate services firm (in terms of 2011 revenue). The company has approximately 34,000 employees (excluding affiliates) and serves real estate owners, investors and tenants/lessees through more than 300 offices (excluding affiliates) worldwide. CBRE offers strategic advice and execution for property sales and leasing; corporate services; property, facilities and project management; mortgage banking; appraisal and valuation; development services; investment management; and research and consulting.  Wikipedia