What is DPO-as-a-Service and when does a company need an outsourced DPO?

“DPO-as-a-Service means appointing an external provider such as Omnitrust as your Data Protection Officer for a fixed monthly fee, instead of hiring in-house. Under Article 37 GDPR a DPO is mandatory for every Greek public body and for companies whose core activity involves large-scale, systematic monitoring of individuals or processing of sensitive data (healthcare, hotels with high guest volumes, education).”