What is the difference between a Manager/Supervisor and a Professional?

The Supervisory and Managerial category describes positions that exercise independent judgment in determining the distribution of work of at least 2 FTEs, and make decisions or recommendations about 3 or more of the following: hiring decisions, performance ratings, merit increases, promotional opportunities, reclassification requests, written warnings, suspensions, disciplinary actions, and/or resolution of grievances or complaints. Each individual job description is reviewed against this definition, and if the customized job content provided by the manager for custom scope, key responsibilities, problem solving and supervision (including organizational chart) does not support the definition of a supervisor or manager job standard, the position will subsequently be approved for a professional job title. Professionals may achieve and be responsible for many of the same functional responsibilities as a manager or supervisor, but achieve results through their own, personally-performed duties, rather than through the efforts of direct reports. 

Specific differences between manager and supervisor are described by the generic scope of each supervisory and managerial level.

Another way to look at it is that a manager is responsible for making significant decisions on what the unit does: its purpose, functions and role, and for making commitments and decisions that require the expenditure of significant unit resources. Managers have a significant, external focus (to the world outside the unit), whereas a supervisor has a more internal focused responsibility for implementing the manager’s decisions through the work of subordinate employees. Once a decision is made on what to do, supervisors have a significant role in deciding how to do it; how to achieve the objective established by the manager. Supervisors often perform the same kind of work that the subordinates do; managers do not do the daily work of the unit as a regular part of their work, they may do it more on an exception basis or in resolving the most difficult problems facing the unit.