I think Quora would be a good starting point. Maybe by googling: site:quora.com robotics And seeing the people who answer and good writers. Also, consider s

I think Quora would be a good starting point. Maybe by googling: site:quora.com robotics And seeing the people who answer and good writers. Also, consider scientific journals and people who are PhD candidates at universities. This balances their expertise with their willingness to be pitched to write on the subject.