Doctor Albert Hirsch played a pivotal role in The Bourne Ultimatum as the one who aided Jason Bourne in the recovery of his memory. At the time of the Bourne Ultimatum, Hirsch is 70 years old, and a 45 year CIA veteran.
Hirsch essentially designed and implemented the training program that was utilized by the CIA for both Operation Treadstone and Operation Blackbriar. His program included what Nicky Parsons claimed was experimental training called "behavior modification". His voice is heard throughout Ultimatum as Bourne flashbacks to instances when he was in the training program. At the end of the film, Noah Vosen contacts Hirsch to warn him that Bourne's on his way and that he should leave the facility. Hirsch instead volunteers to stay and keep Bourne in play long enough for Vosen and his team to arrive. Hirsch takes Bourne to the room where he was continually subjected to the "water treatment" and where he subsequently murdered the real Jason Bourne and assumed his identity. After Bourne's escape and Pamela Landy's faxing of the key pages of Vosen's documents to an affiliate in Washington D.C., Hirsch is brrough before a Congressional Hearing regarding his involvement with Treadstone and Blackbriar along with Noah Vosen and CIA Director Ezra Kramer.
In The Bourne Legacy, Hirsch is murdered by the National Research Assay Group to prevent him from disclosing any information about the Program. The official explanation given for his death is that of a heart-attack.