His long-time very warm/friendly/cozy/financially productive for EXXON relationship with Putin/Russia
He knows everything there is to know about fossil fuels.
Now I ask you what could be a better preparation than that for being HEAD DIPLOMAT serving we the people and the United States of America! Amazing Curriculum Vitae isn't it? He is probably a billionaire too but that isn't as important since Trump already has many of those in his administration. SIGH.