Worf

2364: Assigned as a command division bridge officer on the USS Enterprise-D
2365: Transferred to security, promoted to Security Chief
2366: Accepted discommendation to protect the Klingon Empire
2367: Briefly left Starfleet, defended Gowron in the Klingon civil war
2368: Family name was restored by Gowron, rejoined Starfleet
2372: Reassigned to DS9 as strategic operations officer, in the command division
2373: Joined the House of Martok after being disowned by the Klingons
2375: Became a Federation Ambassador to the Klingon Empire
Assigned to the Enterprise-E as first officer, later given command
Transferred back to the operations division, worked for Starfleet Intelligence