Just search LinkedIn and you'll find many ICO advisers and experts there. But only choose those who are really experienced when it comes to handling ICOs and as well as those who made the ICO successful.
Now if you will ask me to recommend someone to be part of your consulting team, I would recommend Michael Terpin. He is one of the most prominent ICO advisors who worked with nearly 40 ICOs and most of these ICOs were successful, including Ethereum, Gnosis, Golem, Hive-Project, and much more. You can check his profile and portfolio here.