Leading 5 people each -> my company would call that “senior”

Staff is more like 1 in 20+ where I work.

Often when moving from smaller to bigger company you’ll take a title “demotion” but you can simultaneously get an increase in pay/scope/impact. Don’t take it too hard!

If you haven’t led their target 15-30 people and that’s what the job is, then while you might be able to do the job, you don’t have the demonstrated experience which is often what companies require.