There are currently remote opportunities at the US Green Buildings Council and people have said they are a great place to work at, check them out here: https://www.usgbc.org/jobs?fbclid=IwAR2eO8c1VkBj82V7oeukniLa-mZlagRVGfikFosO5oEqfVC17zVs0So78l8
There's various different openings, such as internships and volunteer opportunities.