After reading many of the posts here, I see there is the obvious point missing. Lets be honest, to be a energy trader apart from the obvious experience ect ect that most of the replies here have stated, you need to be in the right place at the right time.
Its political and there will be an existing team already in place with an existing work culture and existing age range. Some teams may average 28 to 35, others may average 30 to 40. So when a 25 year old says can i join the team and trade just like you guys there is already some resistance. experience only helps you so far. I know stock traders who have traded Options ect ect, they go into energy trading and they loss so much money for the company they almost qualify for a hitman put on them. Being a stock trader and being an energy trader are two different things entirely. Its like saying I play football better than David Beckham but i really want to be a basketball player. Ok they are both sports but two different skill sets entirely. I dont mean to be putting you off, actually quiet the opposite. Now let me give you some realistic advice here, if you want experience, notice that different trading desks will require different skills. Some want a back office clerk, some want someone with risk experience, others want someone from a sourcing background, or maybe even confirmations. But then again I have heard stories where a simple data entry clerk was friends with a trader and when a trading position came up he was recommended.
There is no typical trader mentality and there is no ideal candidate for the job, but what you have to realise is that you will be trading other peoples money. So dont expect to be a trader on day one. Would you give me your families money tomorrow and let me trade it? No because you dont know me. Same way an energy company thinks. First get in, do your job right then see what happens.
Good luck!