"NextNav is tackling a critical gap in our national security infrastructure, and the urgency of that mission is what drew me to this role,†said Lisa Hook, newly appointed Board Member. "I look forward to working with Mariam and the team as they execute on their vision for a resilient, terrestrial 5G 3D positioning and timing solution that America needs.†"I am delighted to welcome Lisa to the NextNav Board of Directors,†said Mariam Sorond, NextNav's Chief Executive Officer and Board Chair. "Her leadership ...