Requisition #: 1933 Job Title: Information System Security Officer - Senior Location: Washington, DC Clearance Level: Top Secret Clearance Required Required Certification(s): One of the following: CISM, CISSO, CISSP, CISSP-ISSMP, FITSP-M, GCIA, GCIH, GCSA, GICSP, or GSLC Job Description. This role will help ensure systems are consistently grouped according to attributes such as classification level, FIPS-199 categorization, hosting environment, CNSS 1253 overlays, data types, and business function.