Jacob Silverman doesn’t talk about leadership and business in abstract terms.  For the global CEO of Kroll, the global risk and financial advisory firm, it’s something lived — often at 35,000 feet.  “The structure that I put in place is being on planes a lot,” he says, only half-joking when I ask how he oversees a global organisation employing 6,500 people across 32 countries and territories around the world.  From Dublin to London, Latin America to Asia, Silverman’s travel schedule reads like a map of Kroll’s global reach — and reflects a core belief: that being present matters. “Even after…