Something I have been playing around with (not sure where I am going with it).
Boarding Parties
These are not marines, but well trained boarding parties drawn, at need, from the ships complement [security, if available]. These are trained experts in boarding actions that can be assembled at short notice to perform custom and excise duties, blockade enforcement, and interdiction duties.
Demolitions (Shipboard Demolitions) 2 (3)
Engineering, Systems (Security) 1 (2)
Planetary Tactics (Small-Unit) 1 (2)
Starship Tactics (Boarding Actions) 2 (3)
Weapon, Energy (Phaser) (Stunrod*) 2 (3) (3)
Weapon, Unarmed (Starfleet Martial Arts) 2 (3)
Athletics (choose) 2 (3)
Computer (choose) 1 (2)
Dodge 1
Engineering, Any Other (choose) 1 (2)
First Aid (Trauma) 1 (2)
History (Federation) 1 (2)
Language (choose) 1
Law (Starfleet Regulations) 1 (2)
Personal Equipment (Translator) 1 (2)
Planetary Survival (choose) 1 (2)
Vehicle Operations (Shuttle) 1 (2)
* The stunrod is the primary weapon of the boarding teams, however, each team member is also armed with a standard phaser sidearm should heavier munitions be needed.