Assistant Contractor Special Security Officer (ACSSO)

CenCore is seeking a full-time Assistant Contractor Special Security Officer (ACSSO) in Hanover, Maryland to support security administration and compliance for cleared government work. This position requires an active Top Secret/Sensitive Compartmented Information (TS/SCI) clearance with Full Scope Polygraph (FSP). You will maintain personnel security records, coordinate clearance-related actions, support information and physical security functions, and assist with audits and inspections. Your work helps keep cleared personnel, information, and programs compliant and protected in support of critical national security missions. This role is built for an experienced professional who can step in on day one and contribute without additional training. Key Responsibilities Support daily security administration and contract-compliance activities for cleared government work.Coordinate and submit personnel clearance paperwork, maintain personnel security files, and monitor action status.Initiate, track, document, and maintain security-related administrative actions, program records, and rosters.Administer information-security processes, including document control, logs, file retention, incident reporting, and operating-procedure compliance.Prepare for and support security audits, inspections, and self-assessments.Assist with meetings, reports, and document reviews to ensure accuracy, completeness, and timely follow-through.Respond promptly and professionally to internal and external security inquiries.