For consulting are couple of pre-requisites needed: 

Empathy – understanding your way of working, understanding your strengths and limits, understanding you

Understanding the problem – without capturing the unclarity and bringing it to its core, no solution will be good enough

Technical knowledge – our arena is not politic, it is evidences, solutions, processes and improvements

Experience – best practices are coming not only from technical knowledge, but also from proven in use applications and solutions that works