LEAD INFORMATION SECURITY ENGINEER (ISSO with PQC) (Remote, US)

Lumen is the trusted network for the AI‑powered world, connecting people, data, and applications through our expansive fiber network and connected ecosystem. We enable secure, high‑performance connectivity across cloud, edge, and AI workloads for enterprises, governments, and communities. At Lumen, you’ll work on infrastructure customers rely on today and build for what’s next, where performance, security, and resilience matter. This is a high accountability environment where bold ideas drive real innovation for our customers, partners, and industry. The work is challenging, expectations are clear, and trust is built into how we operate. If you’re ready to take ownership, deliver meaningful impact, and help shape the future of AI‑ready connectivity, join us today. Location This is a remote position open to candidates based anywhere in the U.S. The Role At Lumen, the Lead Information Security Engineer owns the development, maintenance, and defensibility of the security authorization package for assigned systems, ensuring compliance with federal requirements and readiness for assessment. In this role, you apply and refine your RMF expertise through end-to-end execution, working directly with customers and stakeholders to validate controls, surface risk, and drive remediation. Your impact is measured through the successful sustainment of Authorization to Operate (ATO) outcomes, the strength of the system’s security posture, and the ability to support secure, compliant delivery of mission-critical services. The Lead ISSO may operate independently for smaller or less complex environments or in alignment with a Senior Lead (ISSM) for larger programs. The successful candidate will demonstrate the ability to: Serve as the primary ISSO for assigned systems, accountable for end-to-end RMF execution and ATO outcomes Execute the full RMF lifecycle, including categorization, control implementation, assessment readiness, authorization support, and continuous monitoring Develop, m