There are other positions above a TSM such as:
DASFD - Deputy Assistant Federal Security Director- Usually answer to AFSD/S- mostly at Category X Airports

AFSD/S - Assistant Federal Security Director for Screening
AFSD/G - Assistant Federal Security Director - Generalists (use to be AFSD for Operations)
AFSD/I - Assistant Federal Security Director for Inspection
AFSD/LE - Assistant Federal Security Director for Law Enforcement
DFSD - Deputy Federal Security Director
FSD - Federal Security Director
AD - Area Director

Other support service positions are:
Program Assistant
Program Analyst
Program Manager
Management Analyst

Stakeholder Manager

Customer Service Manager

Field Intelligence Officer

Coordination Center Manager

Scheduling Operations Officer

OSHA Program Analyst

Training Instructor
Training Specialist
Training Manager

Payroll Analyst
Payroll Manager

HR Specialist
HR Manager

Administrative Officer