The utilization of the recently introduced yet rapidly proliferating new generation of 5G mobile communications offers many new advantages. However, it has also brought with it the introduction of many new services and technologies compared to its predecessors. This, combined with the ever-expanding threat landscape, means that traditional methods of protection are no longer sufficient. Security Operation Centres (SOCs) are not only popular today, they are becoming an essential part of many organisations. Consequently, the development of a 5G SOC methodology for 5G technology has become progressively imperative. This paper presents our 5G SOC methodology. The SOC developed at Óbuda University, designed for monitoring, analyzing, managing data and log data for incident handling has been specifically tailored for 5G-specific usage. The showcased results underscore the utility and success in the pursuit of pioneering a 5G SOC methodology.