Nexstar promotes Lloyd Bucher to vice president-general manager, broadcast and digital operations, Philadelphia ... E-commerce company Coupang adds Asha Sharma, Microsoft head-AI product, also former Meta, to its board ... Ballistic Ventures, cybersecurity-dedicated venture capital firm, names co-founder Kevin Mandia general partner ... Harmonic Security adds Mark Sutton, Bain Capital managing director-chief information security officer, to its board ... Knowmadics, tech solutions provider, adds Karen Warack, former CIA assistant director-national intelligence, to its board ... Smart Global Holdings, computing, memory and LED tech provider, hires Nate Olmstead, ex-Logitech, as senior vice president-chief financial officer ... IT solutions provider Auvik adds Mark Ralls, ex-ActivTrak and former Invicti Security, as president, and Bryan Getz, ex-Druva, as chief sales officer ... Thrive, outsourcing provider for cybersecurity and cloud services, hires HP's Scott Steele as chief operating officer.