Security people cost a lot, and infosec people in particular can sometimes be utterly useless bureaucrats, while the security engineers are extremely hard to find. It could be something terrible happened, and it was realized they're all useless and need to be replaced.
Alternatively maybe the devops or other team took over their functions. They're not legally required in that industry, while in some industries / publicly traded companies they can be.
Alternatively maybe the devops or other team took over their functions. They're not legally required in that industry, while in some industries / publicly traded companies they can be.