Was filing a bug report in-game for this when my client crashed on me, but that's a separate issue (and I filed a bug report with the pop-up window that showed up after the crash), and I'll try to file again once I've verified my game files.
The Maintenance Engineer - Space DOff says that it reduces the cooldown on Engineering Team and Auxiliary to Structural Integrity Field. I placed the DOff on active duty, but I've not seen a cooldown reduction occur for either power.
Edit: DOff's name is Sinta Inzar, an Andorian female Engineering DOff. The line below the description is 40% SpeedCooldownCategory. Bug 1,232,137 filed in-game.
Double Edit: For that matter, are any of the cooldown-reducing DOffs functional? It didn't seem like the Transwarp DOff I have on active duty is having any effect either.