Catherine Age Halsey, MD, PhD (SN: CC-409871),  is actually a great applauded scientist and you may former worker turned prisoner of the Office off Naval intelligence, most commonly known just like the writer of your own SPARTAN-II System and Mjolnir Powered Physical violence Armour.
 Given that she grew elderly, Halsey took various significant strategies to safeguard their leftover Spartans, actually supposed resistant to the army laws to do this – an option which could bring about their ultimate stop of the ONI’s Kilo-Five in 2553. For the 2558 when Admiral Osman bought Catherine’s performance, Catherine escaped new murder sample and you can defected to help you a’s Covenant.
Catherine Halsey was born for the Endymion towards the March 19th, 2492.  Their teens would give a peek of what would be an excellent guaranteeing community. She are “smarter than her parents, always discovering, talking, learning, and eager to show the woman degree which gay hookup Shreveport have anybody who create tune in.”  She are taken to Scenario by Dean of Biological Technology on  By this section, at the 15 years old, Dr. Halsey had been composing the woman second Doctoral Thesis paper, where she chatted about archaic range sales.  It is reasonably known one sooner or later within her very early lifetime, she watched the production of the latest theme to possess third-age group wise fake intelligences.  She was Vice admiral Ysionris Jeromi’s celebrity pupil as well.  ONI recruited the lady when you look at the 2510 because a civilian associate and you can delivered her to reach.  In the August of that 12 months, Halsey purchased a tiny, hardback record into the a store into the Arrive at, around the feet she try stationed for the. Halsey used the diary just like the a media through which to share with you her viewpoint and you will concerns, along with pen essential lookup notes, and would do thus for another forty-couple of years, up to she given up it through the their escape from Sword Ft. This new record is actually later on retrieved because of the ONI into the 2553, and you can is appointed top-secret. 
Throughout their questionnaire travel towards the Spartan-II applicants, Halsey grew connected to Jacob Keyes. Both was indeed doing work in a romantic relationship during the early 2520s, and in 2525, Halsey offered delivery in order to Miranda and you will raised the girl for a few decades, whenever on the July several, 2531, Miranda’s father offered to simply take the girl in the, raising the lady for the Luna. Halsey carry out later on enjoys a falling-aside that have Miranda, who would later on change the woman courtroom title to her dad’s and won’t speak to Halsey for several years. 
Dr. Halsey supported since the a technological agent on the Place of work of Naval Intelligence out of 2515 to help you 2522, when she is made head scientist.  She made huge benefits to several ONI Point III plans, including the creation and implementation of AI constructs. She created and you will initiated the SPARTAN-II Program, and you can designed new Mjolnir armor system. These scientific improvements every proved to be important advancements on the UNSC, because they had been at some point responsible for making sure brand new endurance out-of mankind.
In 2517, from the ages of twenty-five, Dr. Halsey helmed the fresh new SPARTAN-II System; Spartan-II do would a new generation out of supersoldiers dependent the latest before works of your ORION Opportunity using abducted pupils. Setting up a collection of rigid genetic requirements in order to screen prospective applicants, she understood 150 college students with the system, but ONI create only offer the girl sufficient funding to apply 75. Thus Halsey generated agreements to generally meet all the individuals under control to decide who the girl 75 applicants could be. In the her consult, Junior Lieutenant Jacob Keyes observed her when you look at the interviews out-of John-117. Abreast of opting for the lady applicants, she next encountered the children abducted from their belongings and you will lead into entire world Grab degree. The new ‘recruited’ students was in fact substituted for thumb clones, and therefore eventually passed away inside many years off various neurological and emotional diseases due to complications due to new unperfected thumb cloning processes.