Senior Systems Engineer - Ground Systems & Advanced Concepts

Who We Are: At SES Space & Defense, we deliver secure, resilient connectivity and integrated space solutions for customers operating in the world’s most demanding environments. As part of SES S.A., a global leader in satellite-enabled communications, we combine capabilities across all orbits with extensive global ground infrastructure, managed networks, hosted payload solutions, and mission integration services to support communications, sensing, data transport, and operational resilience worldwide. Our vertically integrated space and ground capabilities bring together satellite capacity, terrestrial infrastructure, advanced network technologies, and deployed user terminals to support mission-critical government operations around the world. We are a trusted partner to the U.S. Federal Government and national security community, allied governments, NATO, NASA, and other civilian agencies, delivering reliable, high-performance solutions when mission success is critical. At SES Space & Defense, our people are our competitive advantage. You’ll work alongside a mission-driven team committed to integrity, innovation, accountability, and delivering real-world impact for customers whose missions matter most. What You'll Do: SES Space & Defense is seeking a Senior Systems Engineer – Ground Systems & Advanced Concepts to support strategic franchise initiatives focused on developing and maturing innovative space-based capabilities and services. The position will focus primarily on the architecture, integration, and delivery of ground-segment capabilities supporting SES mPOWER-based satellite relay services, multi-orbit architectures, intersatellite links, and hosted payload missions. This role bridges concept development and execution, working with franchise teams, Business Development, engineering organizations, customers, and technology partners to translate emerging concepts into executable ground architectures, proofs of concept (POCs), demonstrations, study contracts, and ultimately operational capabilities. Key Responsibilities: Develop ground-segment and end-to-end architectures supporting strategic franchise initiatives, including SES mPOWER-based satellite relay services, intersatellite links, hosted payloads, and UHF capabilities. Translate space-segment concepts into executable ground architectures, interfaces, operational concepts, and integration approaches. Develop and manage system requirements, interfaces and Interface Control Documents (ICDs), architecture models, and verification approaches using MBSE and requirements management practices. Define and integrate ground infrastructure including gateways, ground stations, command and control, mission planning, terrestrial networks, cloud environments, customer interfaces, modems, waveforms, and associated RF equipment. Leverage existing SES infrastructure, networks, software platforms, and operational capabilities to accelerate new concepts and…