Sr Information Systems Security Manager

OSI Systems and its division are seeking an Information Systems Security Manager. The Information Systems Security Manager (ISSM) is responsible for the management, oversight, compliance, and security posture of classified information systems supporting Department of Defense (DoD) programs and contracts. The ISSM serves as the organization's principal authority for classified cybersecurity and works closely with government customers, DCSA representatives, program managers, and external vendors to ensure compliance with DoD cybersecurity and classified information handling requirements.

The ISSM will lead the design, implementation, accreditation, and ongoing management of classified information systems supporting Department of Defense (DoD) programs, as well as establishing a new SIPRNet‑capable classified computing environment from initial planning through Authorization to Operate (ATO) and sustainment.

This role requires a hands‑on leader capable of building classified infrastructure, developing security documentation, managing Risk Management Framework (RMF) activities, implementing technical controls, and maintaining compliance with all applicable government regulations.

• Serve as the designated ISSM for classified information systems supporting DoD contracts and programs
• Develop, implement, and maintain system security policies, procedures, and documentation
• Ensure compliance with NISPOM, DAAG, RMF, and applicable government security requirements
• Maintain system authorization packages and support Authorization to Operate (ATO) efforts
• Coordinate with government Authorizing Officials (AO), Security Control Assessors (SCA), Information System Owners (ISO), and cybersecurity stakeholders

• Lead the planning, design, and deployment of a new SIPRNet‑connected infrastructure
• Coordinate with government sponsoring agencies, DISA, and program stakeholders to establish classified network connectivity
• Develop enclave architecture supporting classified processing, storage, and transmission requirements
• Define and implement security boundaries, network segmentation, and defense‑in‑depth controls
• Coordinate procurement, installation, and configuration of classified IT infrastructure
• Ensure all SIPRNet infrastructure complies with DISA and customer requirements

• Serve as the COMSEC Account Manager and primary point of contact for all COMSEC‑related matters involving classified communications systems
• Manage the COMSEC program in accordance with National Security Agency (NSA), DoD, and customer‑specific requirements
• Develop COMSEC policies, procedures, and local operating instructions to support classified network operations
• Ensure proper safeguarding, accountability, storage, transfer, destruction, and inventory of COMSEC material
• Maintain compliance with applicable Communications Security policies, regulations, and inspection requirements
• Investigate cybersecurity incidents affecting classified systems
• Coordinate reporting and response activities in accordance with DoD and DCSA requirements
• Support forensic preservation, root‑cause analysis, and corrective action implementation
• Maintain incident documentation and reporting records

• Prepare systems and supporting documentation for DCSA inspections, customer assessments, and cybersecurity audits
• Support internal and external compliance reviews
• Respond to findings and ensure timely corrective actions
• Maintain audit‑ready security records and accreditation artifacts

• Provide cybersecurity guidance to program personnel and system users
• Deliver security awareness training related to COMSEC and handling classified information systems
• Mentor Information System Security Officers (ISSOs) and administrators on compliance requirements and best practices
• Uphold the company’s core values of Integrity, Innovation, Accountability, and Teamwork
• Demonstrate behavior consistent with the company’s Code of Ethics and Conduct
• It is the responsibility of every employee to report to their manager or a member of senior management any…