Steven Hackett

Admiral Steven Hackett is a top-ranking official of the Alliance Navy and commanding officer of the Fifth Fleet. He is based at Arcturus Station.

On relatively equal political status with both Ambassador Udina and Captain Anderson, Hackett was one of the three officers who recommended Commander Shepard as the first human Spectre. During the mission to track down Saren Arterius, Hackett frequently contacts Shepard with key assignments, especially those vital to the Systems Alliance security, and is generally more accepting of Shepard's decisions than Udina.

Admiral Hackett is voiced by Lance Henriksen.

Mass Effect
When the Citadel is attacked by Sovereign, Hackett commands the Alliance vessels that reinforce the battered Citadel Fleet. Trusting in Shepard's 'on the ground' judgement, Hackett leads the fleet to either defend or abandon the Destiny Ascension.

Mass Effect 2
As of Mass Effect 2, Admiral Hackett remains a high-ranking member of the Alliance Navy.

If Shepard is a War Hero, then, on Hackett's orders, all proceeds from weddings held at Shepard Memorial Plaza on Elysium go to benefit the families of veterans and Alliance servicemembers who were KIA. If Shepard is Ruthless, he personally orders no arrests be made against those who tried to extinguish the Shepard Memorial Flame on Torfan. And if Shepard survived the Thresher Maw attack on Akuze, then the Admiral will preside over the unveiling of the Shepard Memorial on that world in 2186.

He also transmits to Shepard the location of the Normandy SR-1 crash site and requests that Shepard place a monument there.

Arrival
He will return in Arrival, the final DLC for Mass Effect 2.

Trivia

 * Lance Henriksen voiced Master Gnost-Dural for the Galactic Timeline on BioWare's Star Wars: The Old Republic website.
 * The Shadow Broker has files on Admiral Hackett which can be accessed aboard his ship.