Headquarters: San Ramon, California

Experienced median pay: $122,000

High job satisfaction: 81% of employees

Headquartered in California but present in more than 180 countries, Chevron runs on "Human Energy" with an employee workforce 61,500 strong, nearly half of them in the US.

The multinational oil and gas company's employees and retirees are encouraged to participate in its volunteer program, Chevron Humankind. In 2014, employees logged 350,000 volunteer service hours and donated $20 million to nonprofits and charities, which was matched by Chevron.