Hierarchy of Team Rocket

Higher Tier

Giovanni: Boss

Executives (in order of 1st rank to 4th): Archer, Ariana, Proton, and Petrel
Lieutenants: The Three Beasts (Orm, Sird, Carr)
Admins: (varies in importance and ranks, depending on their assigned departments i.e. Research and Development, Paramilitary/Black-Ops, Intelligence, Managing Lower Tier)

Note: Eve is officially ranked to everyone's eyes and knowledge below Lieutenants and above Admins, but is considered by everyone to be above even the Execs and Giovanni's real right hand in the organization. Record on paper shows she's "rankless."


Lower Tier

Scientists: Anyone below the Head Scientist Dr. Zager (who ranks a mid-level admin)
Grunts
Research and Development Department/Intelligence Department (share rank level)
Menial Grunts (everyday workers)

Note: Paramilitary/Black-Ops do not contain any grunt-level members. They have ranked amateurs, but those still have authority over ordinary lower tier grunts.