Modern Technology Solutions, Inc. (MTSI) is seeking a Information Systems Security Manager to lead RMF lifecycle activities from system categorization through ATO. Your essential job functions will include but may not be limited to: Develop and maintain authorization packages Coordinate with SCA and AO representatives to resolve findings and adjudicate riskPrepare systems for ATO, IATT, and continuous authorizationEnsure implementation and validation of security controls per JSIG/NIST 800-53.T