Mass. Gen. Laws ch. 217 § 23D
In addition to the judicial case managers of the probate and family court provided for in section 23C, the first justices of the respective courts of the probate and family court department for the following counties may, with the approval of the chief justice of the probate and family court, appoint and may, with the approval of the chief justice, remove assistant judicial case managers with the same powers and duties. The appointments shall be as follows:
Barnstable, 3 assistant judicial case managers
Bristol, 7 assistant judicial case managers
Essex, 5 assistant judicial case managers
Franklin, 1 assistant judicial case manager
Hampden, 3 assistant judicial case managers
Hampshire, 1 assistant judicial case manager
Middlesex, 6 assistant judicial case managers
Norfolk, 5 assistant judicial case managers
Plymouth, 5 assistant judicial case managers
Suffolk, 5 assistant judicial case managers
Worcester, 6 assistant judicial case managers.
Mass. Gen. Laws ch. 217, § 23D