functionary (n.)

• agent
• amanuensis
• bureaucrat
• clerk
• commissioner
• conductor
• consignee
• driver
• dupe
• engineer
• factor
• fed
• handler
• implement
• instrument
• mandarin
• manipulator
• office-bearer
• officeholder
• officer
• official
• operative
• operator
• pilot
• placeman
• puppet
• runner
• secretary
• steersman
• steward
• tool