If the accreditation body have indicated a need for an specific appointment, this may be a requirement of a particular program, perhaos due to legislature. They need to clarify and reference the basis of this requirement for you. Certain sectors have professional registration or certified person requirements. An example is registration as a veterinary technician, or certified metrologist through professional bodies. ISO 17025:2017 as a standard, however, does not have a mandatory requirement for an appointed position of Quality Manger or Technical Manager.
What is does require is the identification of management for overall responsibility of the laboratory, i.e. the functional tole of laboratory manager. This person could however be appointed and have the title of director, operations manager or technical manager. Furthermore personnel must be assigned and have the authority and resources for the implementation, maintenance and improvement of the management system. This is typically a quality role, which could be held by a quality manager or responsibilities shared amongst personnel. Either way the responsibility, authority and inter-relationships of all personnel including management; must be defined to ensure technical competency for the tests a laboratory performs. In a larger laboratory this may necessitate the appointment of a technical manager; however the structure may accommodate a number of lead scientists or technicians as responsible for different activities (such as method development). These authorised personnel would report directly to the laboratory manager. Each laboratory should identify personnel and management needs based on risk; and ensure that there are procedures and records for determining competence requirements; as well as selecting, training supervising, authorising and monitoring all personnel. On a technical note
For more information to meet ISO 17025 requirements, see the complimentary white paper (PDF) Clause-by-clause explanation of ISO 17025:2017 available at https://info.advisera.com/17025academy/free-download/clause-by-clause-explanation-of-iso-17025/ and the ISO 17025 Toolkit at https://advisera.com/17025academy/iso-17025-documentation-toolkit/