49. NRG Energy

Headquarters: Houston, Texas, and Princeton, New Jersey

Experienced median pay: $96,700

High job satisfaction: 85% of employees

Employees at green-energy company NRG can take advantage of benefits like college scholarships, rewards for outstanding work, and discounts on appliances and services to make their homes more sustainable, such as solar-panel installation, smart thermostats, and electric vehicles. The company's Houston campus is LEED-certified, and the Princeton headquarters will receive a number of upgrades to make it more environmentally friendly.