If you're here looking up Green Mountain Energy customer care, you probably already know who they are. But it helps to get an idea of how big they are and what their support operation looks like if you are a customer. Green Mountain Energy also goes by or is associated with the names NRG Energy, Inc., Green Mountain Energy. They are considered to be part of the following sectors and industries: Utilities, Renewable Electricity, Renewable Energy. Green Mountain Energy is associated with terms like private, renewables & environment, e-commerce, enterprise, b2b, energy by their customers and industry analysts. They are similar to companies like Terminix, SunPower. They employ 8,763 people according to customers in the know.