The skills you need guide to interpersonal skills

Investigators
Investigators like to have all the facts available, 
and use data as a way to persuade others.
Their approach tends to be quite structured and methodical, and they 
like to lead people step by step to their desired solution. They are very 
much about gathering the evidence, and presenting ideas, using data to 
address any arguments.
With the right group, this can be very effective, but it can also lead to a 
suspicion that you are trying to ‘blind people with science’. 
Al Gore, the former US Vice-President, is something of a investigator in 
his work on climate change.
4. 
Calculators