Assuming you are looking at the private sector security arena, a degree in Security Management could be a good choice. Employers appreciate the foundational knowledge associated with this degree. Of course, this is not the only option. My clients have been very supportive of candidates with degrees in Business, International Relations, Law and Economics. Criminal Justice and/or Police Science are not presently in vogue in the private sector and are more commonly seen as a path to a public sector law enforcement career.