At fifty one years of age, Geoff is divorced and has two children, both of whom are grown. He has a PhD in Chemistry from MIT and received his exactly one day younger than Mark was when he did. He formed a partnership with Daniel Singer forming Merrick/Singer, and a year later them became billionaires when they went public. They have a total of eighty patents over twenty five years and their company has grown to a staff of 160. Their largest patent was for an organic based filter to remove sulfur from coal fired plant emissions. A low key man, he prefers to work in the shadows.