TEXT: ORION RANK INSIGNIA
  MASTER
  COMMANDER
  CAPTAIN
  2nd LIEUTENANT
  1st LIEUTENANT
  CREWMAN
  ABLE-BODIED
  PETTY OFFICER
  ENGINEER
  NAVIGATOR
  SHIP’S DOCTOR
  MARINE
  INTELLIGENCE
  CHANDLER
  COMMODORE
  WARLORD
  CRIMELORD
  RATING
  RATING
  RATING
  Orion enlisted crewmen wear green insignia.
  General crewmen wear a simple disk. An able-
  bodied crewman has experience and skills. Petty
  officers are general-skill team leaders.
  Those Orion crewmen with a specific skill are
  called “ratings” and wear the small devices
  indicating their skill area. There are three ranks
  of these and the higher two are petty officers.
  Marine
  Engineer
  Navigator
  Orion officers come in two types, warrant officers
  with a technical specialty (e.g., engineering) and
  lieutenants (who outrank warrants). All wear blue
  +silver insignia. Most ships will have one 1st
  Lieutenant (the ship’s XO and second in
  command), one or more second lieutenants, and
  one or more junior lieutenants. (It is up to the
  captain to decide if a warrant deserves the more
  higher rank of lieutenant.) Lieutenants are
  generalists able to work effectively in any speciality
  area (except medical). They can but do not always
  serve as department heads.
  Warrants are in one of six skill areas (as above).
  Chandlers handle cargo, accounting, sales, and
  purchases. Warrants have three levels of seniority
  distinguished by one, two, or three devices.
  Every ship will have a single command officer.
  Masters (equal to lieutenant commanders) run
  the smaller and less important ships. Most Orion
  combat ships have commanders. Only a few key
  ships will have a full-rank captain.
  Orion “flag officers” who command multiple ships
  come in three ranks. Each cartel has a single
  crimelord and two-to-four warlords, plus as many
  commodores as the crimelord needs to control
  his ships and territory. A few crimelords have
  senior staff officers who hold command rank but
  a specialist warrant (e.g, commodore-chandler).
  JR LIEUTENANTS
  Copyright © 2010 ADB, Inc.
  
SOURCE: textdata/thevault/Star Trek RPG/Prime Directive/02. Armadillo Design Bureau/PD20 Modern/Website Freebies/Orion_Rank_Insignia.pdf