Leidos seeks a Subject Matter Expert (SME) to support NASA's NASCOM (NASA Communications) mission. This SME will serve as a Tier 3 technical authority, providing advanced troubleshooting, architectural guidance, and operational leadership for the NIOC operations floor. The role requires deep expertise across networking, communications, telephony, and real-time operational environments, along with the ability to interface directly with NASA leadership and mission stakeholders. Key Responsibiliti