Md. Code, Housing and Community Development § 16-302

(a) Montgomery Commission employees are divided into two bargaining units:

(1) the office/professional/technical unit; and

(2) the service/labor/trade unit.

(b) The office/professional/technical unit includes:

(1) office classification titles in which employees are responsible for communications, recording and retrieving information, and paperwork required in an office;

(2) professional classification titles in which employees have special or theoretical knowledge that usually is acquired through college training, other training that provides comparable knowledge, or work experience;

(3) paraprofessional classification titles in which employees perform, in a supportive role, some duties of a professional or technician that usually require less formal training or experience than those duties performed by those with professional or technical status; and

(4) technical classification titles in which employees have both basic scientific or technical knowledge and manual skill that are usually acquired through specialized postsecondary school education or through equivalent on-the-job training.

(c) The service/labor/trade unit includes:

(1) classification titles in which employees:

(i) perform service and maintenance;

(ii) may operate specialized machinery or heavy equipment; and

(iii) have duties that contribute to the comfort and convenience of the public or to the upkeep and care of Montgomery Commission buildings, facilities, or grounds; and

(2) classification titles in which employees must have a special manual skill and thorough knowledge of processes that are acquired through on-the-job training, experience, apprenticeship, or formal training programs.