Is there any roles for public health ?

Hello,

Yes, the military employs public health consultants. I am not sure on the entry process for those already qualified, the colleagues that I know of who work in public health have trained through the military.
It would be worth discussing this with the Army Medical Services recruiting team, their contact details can be found at the bottom of their website page https://www.army.mod.uk/who-we-are/corps-regiments-and-units/army-medical-services/
They also have various social media platforms you could try contacting them on.