• Solar architect or designer: They design buildings to best use energy from the sun.
  
  
• Solar builder: They build buildings with passive and active solar designs.
  
  
• Solar installers: They install solar collectors for hot air and water and photovoltaic systems.
  
  
• Solar consultants: They advise people on what kinds of solar systems would work best in their home or business. They also determine the size of the system needed.

If you are interested, perhaps you could invent a more efficient solar collector or photovoltaic system or better insulation?