Mass. Gen. Laws ch. 217 § 23B
The registers of probate of the respective courts of the probate and family court department for the following counties may, subject to the approval of the court administrator as to compliance with personnel standards promulgated pursuant to section 8 of chapter 211B, appoint 1 or more administrative deputy assistants; provided, however, that administrative deputy assistants may be removed at the pleasure of the registers of probate. The administrative deputy assistants shall meet the definition of both confidential and managerial employees as those terms appear in chapter 150E and shall perform no official judicial duties. The appointments shall be as follows:
Barnstable, 1 administrative deputy assistant
Essex, 1 administrative deputy assistant
Middlesex, 4 administrative deputy assistants
Norfolk, 1 administrative deputy assistant
Plymouth, 1 administrative deputy assistant
Suffolk, 2 administrative deputy assistants
Worcester, 2 administrative deputy assistants.
Mass. Gen. Laws ch. 217, § 23B