National Rural Telecommunications Cooperative hires Greg Santoro, ex-NII Holdings, as chief marketing and strategy officer, new position ... Hiroki Totoki, currently Sony senior vice president-corporate planning, finance and new business creation, becomes CEO, Sony Mobile Communications, effective Nov. 16, replacing Kunimasa Suzuki, who will shift that same date to executive vice president, Sony Entertainment ... Sprint names Junichi Miyakawa, from majority owner SoftBank Group, as technical chief operating officer, new post, but he also remains executive vice president and on the board of SoftBank Mobile, SoftBank BB and SoftBank Telecom ... Immersion Corp. hires Mahesh Sundaram, ex-Dolby Labs, as vice president-worldwide OEM sales.