LEO-PNT System and Segment Interfaces Coordinator, Noordwijk-Binnen

LEO-PNT System and Segment Interfaces Coordinator Job Requisition ID: 20546

Date Posted: 13 May 2026

Closing Date: 3 June 2026 23:59 CET/CEST

Publication: Internal&External

Type of Appointment: Fixed-Term

Directorate: Navigation

Workplace: Noordwijk, NL

Grade Band: A2 - A4

Description LEO-PNT System and Segment Interfaces Coordinator in the Celeste System Unit, Celeste Programme, Future Navigation Department, Directorate of Navigation (D/NAV). Reporting to the Celeste System Manager, you will be responsible for the system interfaces for the IOP and EU LEO-PNT projects, as well as for supporting other areas of system engineering. Celeste is the Component 1 LEO-PNT of the FutureNAV programme. Celeste represents the ESA contribution towards the establishment of a European Low Earth Orbit Positioning, Navigation and Timing (LEO-PNT) capability as part of a multilayer system-of-systems PNT architecture. This component aims to complement existing GNSS services by leveraging a constellation of LEO satellites to deliver enhanced resilience, improved accuracy, and innovative features for emerging applications.

Celeste Team Responsibilities

Implementation of the Celeste In-Orbit Demonstrator (IOD) phase, with two ongoing industrial contracts, each of them implementing an end-to-end system, including launch services, operations and service demonstration, showcasing the feasibility and benefits of using low-Earth orbits, novel signals and frequency bands;

Implementation of the Celeste In-Orbit Preparatory (IOP) phase to prepare for a future LEO-PNT operational system for the European Union and to unlock global commercial opportunities, driving innovation and reinforcing European leadership in emerging PNT markets, including the development and qualification of pre-operational products and building blocks, their industrialisation, including mature and qualified technologies, and the creation of the Celeste in-orbit validation end-to-end system;

The associated system engineering, technology development, ground segment, launch services, operations, in-orbit demonstration, industrialisation and system in-orbit validation activities;

The associated coordination activities with the EU in preparation for an EU LEO-PNT operational system;

Contributions towards LEO-PNT interoperability and compatibility with GNSS and other LEO-PNT systems, in collaboration with international stakeholders.

Duties

Responsibility for the system interfaces, covering both internal and external interfaces for the Celeste IOP and future operational LEO-PNT, with a particular focus on TT&C and ISL;

Supporting and coordinating with the ESA D/NAV ground segment team for the EU LEO-PNT ground segment aspects;

Definition and maintenance of system interfaces, such as ground-to-ground, ground-to-space and space-to-space interfaces, including security aspects;

Contributing and coordinating with those responsible for operations within the Celeste system team and with the EU LEO-PNT operations team;

Contributing to and supporting the follow-up of activities relating to the ground segment and interfaces that contribute to EU LEO-PNT; definition of IRDs and ICDs;

Follow-up of industrial activities with a focus on interfaces and ground segment and ensuring coherence and consistency among Celeste contracts and EU LEO-PNT;

Coordinating a team of engineers and specialised engineering support from the ESA Directorate of Technology, Engineering and Quality in the area of interfaces and ground segment;

Following up the implementation of interfaces and ground segment aspects at system level;

Assisting in non-conformance and technical change/engineering boards, analysing related requests for deviations/waivers and issuing recommendations on the way forward;

Supporting verification and validation activities in the areas of interfaces and ground segment;

Supporting other system engineering areas, such as performances and system architecture, when required;

Supporting project management for technical interfaces between ESA and partner organisations, if relevant;

Providing regular reporting to project management on all aspects in your area of competence, identifying risks and problem areas and proposing mitigation actions, where appropriate.

Technical Competencies

Knowledge of and experience in the system engineering domain

Knowledge of and experience in satellite navigation systems

Knowledge of and experience in managing industrial activities in the space domain, with a focus on the ground segment

Knowledge of and experience in interfaces covering ground to ground, ground to space and space to space

Knowledge of and experience in system validation and verification processes

Behavioural Competencies

Result Orientation

Operational Efficiency

Fostering Cooperation

Relationship Management

Continuous Improvement

Forward Thinking

For more information, please refer to ESA Core Behavioural Competencies guidebook.

Education and Professional Experience A master’s degree in a relevant engineering or scientific discipline is required. Alternatively, candidates with a bachelor’s degree, complemented by an additional four years of relevant professional experience, may be considered.

Additional Requirements

A strong result orientation with the ability to set priorities and present practical solutions both orally and in writing;

Demonstrated planning and organisational skills.

Assets

Experience in LEO-PNT systems and/or GNSS systems;

Experience in TT&C interfaces and/or intersatellite links;

Experience in ground segment for LEO systems;

Strong communication and relationship management skills in an international context, i.e. outside your home country.

Diversity, Equity and Inclusiveness ESA is an equal opportunity employer, committed to achieving diversity within the workforce and creating an inclusive working environment. We therefore welcome applications from all qualified candidates irrespective of gender, sexual orientation, ethnicity, religious beliefs, age, disability or other characteristics. At the Agency we value diversity, and we welcome people with disabilities. Whenever possible, we seek to accommodate individuals with disabilities by providing the necessary support at the workplace. The Human Resources Department can also provide assistance during the recruitment process. If you would like to discuss this further, please contact us via email at .

Important Information and Disclaimer In principle, recruitment will be within the advertised grade band (A2-A4). However, if the selected candidate has less than four years of relevant professional experience following the completion of the master’s degree, the position may be filled at A1 level.

Applicants must be eligible to access information, technology, and hardware which is subject to European or US export control and sanctions regulations and eligible to acquire the security clearance by their national security administrations.

During the recruitment process, the Agency may request applicants to undergo selection tests. Additionally, successful candidates will need to undergo basic screening before appointment, which will be conducted by an external background screening service, in compliance with the European Space Agency's security procedures.

Note that ESA is in the process of transitioning to a Matrix setup, which could lead to organisational changes affecting this position.

The information published on ESA’s careers website regarding working conditions is correct at the time of publication. It is not intended to be exhaustive and may not address all questions you would have.

Nationality and Languages Please note that applications are only considered from nationals of one of the following States: Austria, Belgium, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Luxembourg, the Netherlands, Norway, Poland, Portugal, Romania, Slovenia, Spain, Sweden, Switzerland, the United Kingdom and Canada, Cyprus, Latvia, Lithuania and Slovakia.

According to the ESA Convention, staff shall be recruited on the basis of their qualifications, taking into account an adequate distribution of posts among nationals of the Member States.

The working languages of the Agency are English and French. A good knowledge of one of these is required. Knowledge of another Member State language would be an asset.

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