Many organisations outsource DPO function just to lower the risk of being fined for non-compliance. In the reality, many of them do not need DPO at all, and were tricked to hire a person who will make them GDPR compliant for as low as few hundred euros a month. Once you understand who needs DPO, make your own decission if provacy protection in such organisations should be outsourced to a part time DPO.
Answer these three simple questions to find out if you are one of them.
Just make sure to understand, questions are about your core activities – not about processings you do occasionally. If you are not sure what exactly “systematic monitoring” or “large scale” mean, trust the EU authority and check out what they say.