"Nothing will stand in the way of the Empire"-Director Krennic
Orson Callan Krennic was a human male who served in the Galactic Republic as a Lieutenant Commander. After the Galactic Empire was formed, Krennic was promoted to commander and later the fleet equivalence of admiral. He also served as Director of the Advanced Weapons Researchdivision of the Imperial Military during the Galactic Civil War. As an old friend of Galen Erso, he manipulated him into researching crystals for the Death Star's energy weapon without his knowing, hoping it would excel him above his rival, Grand Moff Wilhuff Tarkin. He was responsible for the security of the Death Star project, and commanded a squad of death troopers, wielded as his personal weapon against the Rebel Alliance.
(source Star Wars wiki)