Collins Aerospace is seeking an Sr. Information Systems Security Manager (ISSM) who strives for excellence and has a passion to be part of a team that strengthens our nation and improves the security of our world. Collins Aerospace work environment is passionate, highly collaborative and provides engineers with the freedom to strengthen and expand their skills, explore new and creative ideas, and work closely with our nation’s finest service members all while embracing integrity, innovation, and work-life balance. As the site ISSM you will have an end-to-end Cybersecurity Program for all classified and controlled information systems at our Maryland Office facility. You will partner with Program Management, Engineering, and the Cognizant Security Agency (DCSA) obtain and sustain ATO on schedule, mentor a growing ISSO team, and keep our environment audit ready every day. This is an ONSITE position at our Westford, MA Location What YOU will do: Lead RMF/JSIG/DAAPM execution — architect secure solutions, prepare authorization packages, brief Security Control Assessments, and drive POA&M closure. Experience with DFARS 252.204-7012, NIST SP 800-171, and/or CMMC requirements. Familiarity with Controlled Unclassified Information (CUI) safeguarding requirements and related DoD compliance standards. Own continuous monitoring — vulnerability & patch management (ACAS/Nessus, SCAP, STIGs), log analysis (Splunk), account management, media control, incident response, and annual self-inspection. Develop people & process — coach ISSOs, refine SOPs, track metrics, and present status to senior leadership and customers. Interface with external stakeholders — act as the single voice to DCSA, SAPCO, and other Cognizant Security Agencies for all cybersecurity matters.