Programs focused on sustainable energy provide students with knowledge surrounding alternative, more environmentally friendly forms of energy. Some common topics may include renewable energy transportation systems, thermodynamics, wind energy, nuclear engineering, solar thermal energy applications and energy systems management.

Requirements for the PhD program often involve the student having already obtained a Master’s degree. Additionally, a thesis or dissertation primarily consisting of original academic research must be submitted. In some countries, this work may even need to be defended in front of a panel.