Vegapunk

Dr. Vegapunk (Dr.ベガパンク, Dokutā Begapanku) is the leading scientist in the employment of the Marines. His work includes discovering the secrets and uses of seastone, the secrets of how Devil Fruit powers work, and various other scientific achievements that are said to be at least 500 years ahead of current technology. He hails from the technologically advanced Karakuri Island. Despite Vegapunk's achievements, he has yet to make a personal appearance in the current storyline. (Source: One Piece Wikia)