Headquarters: Washington, DC

Experienced median pay: $114,000

High job satisfaction: N/A

The government-sponsored mortgage-servicing giant is headquartered in the country's capital, with six other regional offices around the country as well. Through the SERVE initiative, employees can take up to 10 paid hours per month to participate in volunteer opportunities. The company even holds an annual week-long event, 7 Days to SERVE, in which the entire company gets involved in charity work. In 2015, it volunteered a total of 11,000 hours.