and names Atif Zaim to succeed Chase as head of its consulting practice; both effective Oct. 1 ... Frontier Technology promotes Chief Financial Officer Jose Hidalgo to president ... New hires at Stability AI, generative AI company: Ozden Onder, ex-Wildlife Studios, as chief people officer; Jordan Valdes, ex-IBM, as vice president-communications and community; Scott Trowbridge, ex-Circle and WeWork, as vice president-business development; and Ben Brooks, ex-Google, Coinbase and Uber, as global head-public policy ... Edison Interactive, digital out-of-home provider, names Magnite’s Allen Dove chief technology officer ... Enghouse Systems, enterprise software provider, adds Magnet Forensics General Counsel Vivian Leung to its board ... Optimum appoints as vice presidents-general managers Kathleen Preston, from Cox Communications, for West Pacific Area, Elton Hart, ex-Comcast Business, for Mid Atlantic Area, and Vic Pascarelli, ex-Comcast,for Northeast Area; also moves Michael Shaffer to vice president-GM, Mid Central Area …Former Flatiron School cybersecurity instructor and solo attorney Joseph Gawlowicz joins Mullen Coughlin as an associate in its incident response practice.