(ISC)2 certifications are some of the most valued certifications available to IT security professionals — and employers. There’s a reason for that. (ISC)2 has a reputation for validating not only security knowledge, but also expertise by maintaining a stringent qualification regime for all its certifications. Unlike many certifications, which test proficiency through the knowledge on the exam, (ISC)2 requires documented work experience and a sponsorship to earn their certification. These requirements mean (ISC)2 training is tailored to IT professionals with some security experience already.