So it looks like this is because his "previous employer disclosed in an SEC filing that it had launched an investigation into fraudulent financial reporting."

The company, which makes dental equipment, opened an investigation in March after several employees raised concerns about how Dentsply was using incentives to sell products to distributors in the second half of 2021. The audit committee of the board wants to know whether those incentives were properly accounted for in quarterly reports, and also whether “certain former and current members of senior management” directed the use of those incentives to hit compensation goals.

This part is pretty crazy:

Even better: for his one day of work at Moderna, Gomez will receive his full year’s salary of $700,000, plus COBRA health insurance coverage for 12 months. Moderna did say that Gomez will forfeit his signing bonus, relocation reimbursement, and equity awards

Makes it sound more like some kind of payoff