Millennials are no longer the new kids on the work block. Many of them are in their 30s, and not surprising, they're experiencing high rates of job dissatisfaction. According to Deloitte's Global Millennial Survey 2019, of more than 13,000 millennials across 42 countries, 49 percent will quit their jobs within the next two years. That's a significant increase; that number was 38 percent in Deloitte's 2017 report.