Early LifeEditBorn into "Starfleet Royalty", Decker grew up in on Earth in the city of San Fransisco on the famously crooked Lombard Street. Her father Dennis was gone on Starfleet assignments the majority of her childhood, though the family temporarily relocated to Vulcan for two years in 2343.
As he left starship command upon being promoted to Rear Admiral, Stacey returned to Earth to attend Starfleet Academy.
Arriving at the Academy two weeks early, Decker attended an introductory systems engineering seminar and switched from Command to the Engineering Branch, much to her father's dismay.
She graduated from the Academy and was accepted into Starfleet's two-year Theoretical Engineering Training Program.
Prior to assuming command of the Rapier, she served as XO of the USS Treant and as an engineer on three other starships.On stardate 48408.3 she assumed command of the Saber class USS Rapier in orbit of Betazed while holding the rank of Commander.
While operating in the Typhon Sector she and Stone started a romantic relationship. They took a runabout from Deep Space Five to Ivor Prime for five days of shore leave. They happened to be at one of Stone's former shipmate's abandoned cabin when a Borg Cube arrived. A hidden emergency transporter allowed them to return to the runabout and evacuate 30 colonists as the colony was destroyed. ("First Contact")
During the evacuation of Starbase 314, the Rapier was badly damaged and left adrift. During the battle Decker's legs were crushed by debris. She, along with the eighteen surviving members of her crew, were captured by Dominion forces.
She ended up in a Dominion Prisoner of War Camp, along with Gedna Tachion, Arok, Seff O'Rourke, Colonel Nekrot and Commander Sela. The injuries she received during the Rapier's destruction, along with the lack of medical care in the camp, left Decker a paraplegic. The camp was liberated by forces from the 101st Tactical Wing shortly after Operation Return. ("Familiar Faces")
By stardate 53078.4 she was able to walk again and returned to full duty as commander of the USS Vertigo with a promotion to Captain.