Prosser joins as a marketing manager, having previously worked at Manchester agency Love as project manager since 2008. Prosser has worked with clients such as Warburtons, BBC and Microsoft.
She has also worked in the stock photography industry where she launched two UK companies into the US and Australia.
Maynineteen has also appointed Lee Power as production technician.
Power's experience across different service industries includes working as animator for gaming companies such as Cubic Motion and Rockstar Games.