Optimum hires Comcast’s Michael Parker as executive vice president-business services, newly created role, and promotes David Williams to executive vice president and president-consumer services and Leroy Williams to executive vice president-chief growth and innovation officer ... Arista Networks appoints Aspen Technology’s Chantelle Breithaupt as chief financial officer, effective February ... Cox Enterprises advances Patrick O'Boyle to senior vice president-corporate development, and elevates Rob Huting to vice president-corporate development, reporting to O'Boyle ... Tencent Music Entertainment Group Vice President Lixue Shi resigns for personal reasons, effective Dec. 31.