Where was Nvidia’s security team?

Outsiders had little reason to notice when Nvidia’s longtime chief security officer and head of product security stepped down in August. Just two and a half months later, CEO Jensen Huang himself left the company over growing questions about his extramarital relationships — starting with an executive at Megaspeed, a Singapore data center company that U.S. investigators suspect of funneling Nvidia chips to China, then widening to reports about two separate affairs with Nvidia employees.

At the time, David Reber, who spent four years as CSO and seven at Nvidia overall, said he was leaving for health reasons. “This wasn’t a pivot I had planned. But I know what needs to come first: family and health,” he wrote on LinkedIn in late August, disclosing that he’d been diagnosed with young-onset Parkinson’s more than two years ago.

Reber’s replacement, Saša Zdjelar, previously spent 17 years at ExxonMobil in Houston, leaving as a senior IT manager before spending one year at Salesforce and several years at the cybersecurity company ReversingLabs. Zdjelar didn’t respond to questions Thursday about the transition or what the security team knew.

Nothing public connects Reber’s or Zdjelar’s role changes to the Megaspeed matter, but it seems fair to wonder what Nvidia’s security team knew about the government’s scrutiny of Megaspeed and about Huang’s relationships, and whether anyone raised concerns. Reber didn’t respond to questions Thursday. Nvidia also has not answered our related questions.