Position Summary: TechSur is seeking a Cybersecurity / cATO Lead to support secure software development, continuous monitoring, authorization artifacts, and operationalization of Continuous Authorization to Operate for the EXIM Online modernization program. This role will help embed security and compliance into DevSecOps pipelines, engineering workflows, runtime operations, and authorization decision support. Key Responsibilities Develop and maintain cATO roadmap materials, control mapping, system boundary documentation, governance roles, authorization artifacts, and security evidence packages. Map NIST SP 800-53 Rev. 5 controls to automated technical controls, pipeline evidence, runtime telemetry, and continuous monitoring outputs. Support secure SDLC implementation aligned to NIST SP 800-218 SSDF, EO 14028, Zero Trust, SBOM requirements, software supply chain security, and secure-by-design practices. Support ATO documentation, SSP, SAR, POA&M, SBOM updates, security assessment responses, risk posture summaries, and Authorizing Official decision briefings. Coordinate with EXIM cybersecurity stakeholders, ISSO, engineering, DevSecOps, O&M, and program leadership to maintain continuous authorization readiness. Help implement continuous monitoring dashboards, vulnerability remediation workflows, evidence repositories, and release-aligned auditability.