Senior Architect, 3GPP NR NTN, meoSphere

Senior Architect, 3GPP NR NTN, meoSphere
The job responsibilities outlined in this document are not exhaustive and may evolve over time and be reviewed according to business needs.
PROGRAMME DESCRIPTION
meoSphere is the next generation of SES’s Medium Earth Orbit (MEO) satellites, delivering secure connectivity services for governments, enterprises, and commercial customers worldwide, while enabling high\-speed broadband to eliminate connectivity gaps.
To accelerate development, improve quality, and increase vertical integration, SES is bringing key payload development and integration capabilities in\-house within a state\-of\-the\-art manufacturing and test environment.
ROLE DESCRIPTION SUMMARY
As Senior Architect, 3GPP NR NTN, you will own the end\-to\-end technical architecture of SES's next\-generation NTN platform, shaping how RAN, payload, SMO/O\-RAN, and core network technologies come together to deliver a flight\-ready system.
Acting as the principal technical authority for NR NTN, you will define the architectural vision, drive critical technology decisions, and align internal and external stakeholders around a common system strategy. You will lead the definition of RAN requirements, guide multi\-vendor integration, and establish the verification approach needed to deliver a high\-performance and operationally robust solution.
Success in this role will be measured by the delivery of an integrated NR NTN system with validated performance, clear architectural ownership, strong vendor alignment, and a verification framework that enables both programme demonstrations and operational deployment.
PRIMARY RESPONSIBILITIES / KEY RESULT AREAS
Define and drive the 3GPP NR NTN system and RAN architecture, including key trade\-offs across payload, RAN, and core
Act as the technical authority for NTN RAN, aligned with 3GPP Rel‑17/18/19 and future evolution
Specify and drive RAN requirements, ensuring alignment across payload, UE, chipset, and core stakeholders
Define and own the RAN verification and validation strategy, including system\-level test scenarios and performance KPIs
Lead RAN bring\-up activities, including integration of gNB, UE, chipset, and payload components in a multi\-vendor environment
Own the beam hopping architecture and operational concept, including scheduling, interference management, and capacity optimization
Lead SMO / O\-RAN architecture and development direction, including on\-board SMO concepts and real\-time RIC integration
Drive integration of NTN RAN with 5G Core, with particular focus on on\-board UPF and distributed core architectures
Specify, drive, and manage change requests with RAN vendors, ensuring alignment with system requirements and delivery timelines
Act as the primary technical interface across RAN, payload, core, and orchestration teams
What you coordinate and enable
Coordinate all RAN\-related activities across internal teams and external partners
Ensure multi\-vendor alignment on requirements, interfaces, and integration priorities
Drive end\-to\-end system integration, verification, and performance optimization
Support technology roadmap, system evolution, and standardization activities
Provide technical guidance and mentoring to senior engineers across domains
What success will look like
A stable and well\-defined NR NTN system architecture and RAN requirement baseline, with clear interfaces across RAN, payload, SMO, and core. Successful RAN bring\-up and multi\-vendor integration, supported by a robust verification strategy and validated performance. Effective vendor alignment through controlled change requests. A cohesive engineering effort enabling demo readiness and flight validation.
COMPETENCIES, QUALIFICATIONS, \& EXPERIENCE
10\+ years in wireless systems, RAN, NTN, or satellite communications
Strong expertise in 3GPP NR architecture, RAN systems, and NTN (Rel‑17\+)
Proven experience in RAN requirement specification, verification strategy, and system integration
Hands\-on experience with multi\-vendor environments, bring\-up, and vendor coordination
Solid knowledge of 5G Core architecture, including UPF and distributed/on\-board deployments
Strong understanding of NTN constraints and satellite communication systems
Nice to have
Experience with beam hopping, beam management, or payload optimization
Knowledge of O\-RAN architecture, SMO, and RIC frameworks
Background in PHY, link\-level performance, or system simulation
Participation in 3GPP standardization or advanced research programs
Mindset \& Values
System owner mindset — drives coherence across domains and vendors
Pragmatic rigor — defines clear requirements and verification without blocking delivery
Hands\-on architect — capable of diving into technical issues when needed
Low ego, high standards — builds alignment across strong technical stakeholders
OTHER KEY REQUIREMENTS / COMMENTS
The candidate must be eligible for a “SECRET” security clearance, in accordance with the national regulations as well as EU/ESA/NATO equivalents
Willing to work at least 60% onsite from office
Travel as required for project realization purposes
Embark on a career with us, where diversity isn't just a buzzword – it's our driving force. We are crafting a workplace mosaic that values every hue, background, and perspective. Join a global team where inclusivity sparks innovation, and individuality is not only embraced but celebrated. At SES we are committed to hiring inspiring individuals from all backgrounds. We take great pride in creating safe and inclusive processes and we support the recruitment, retention, and evolution of all employees irrespective of gender, colour, race, ethnicity, religion, sexual orientation, disability, veteran or marital status, background or walk in life.
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SES and its Affiliated Companies are committed to providing fair and equal employment opportunities to all. We are an Equal Opportunity employer and will consider all qualified applicants for employment without regard to race, color, religion, gender, pregnancy, sex, sexual orientation, gender identity, national origin, age, genetic information, protected veteran status, disability, or any other basis protected by local, state, or federal law.
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