Mason Clinic is a large mental health service with approximately 350 full-time staff employed on site. Major clinical and management decisions come out of a multi-level consultation process that is endorsed by a Clinical Governance team. The Clinical Governance group meet monthly and is chaired alternatively by the service manager or clinical director. The general manager of the Waitemata DHB Mental Health Group is also in attendance. The deputy clinical directors, associate service managers and heads of departments provide reports that highlight operational, clinical issues around innovative service provision and risk management.

Associate service managers and deputy clinical directors collaborate with unit managers and team leaders to ensure the safe, secure and efficient operations of each sub-service or team. The day to day operations of each of the sub-service teams are managed by nurses in charge and/or team leaders.

Maori and Pacific Island specific cultural guidance and support is provided by staff who are affiliated to Polynesian tribal/country groups. A kaumatua (tribal elder) and a matai (Samoan chief) are the senior cultural advisors.

Health professionals (consultant psychiatrists, psychologists, social workers, occupational therapists, cultural advisors, consumer advocates) are encouraged to meet regularly for co-ordination, planning and group supervision. Administrative and multi-skilled staff  keep the organisation well tuned and maintained.