Galileo Constellation Deployment and Replenishment Architect

European Space Agency - ESA
Noordwijk, The Netherlands
Added: April 20, 2024

Galileo Constellation Deployment and Replenishment Architect

Job Requisition ID: 18621

Closing Date: 6 May 2024 23:59 CET/CEST

Establishment: ESTEC, Noordwijk, Netherlands

Directorate: Directorate of Navigation

Publication: Internal & External

Type of Contract: Permanent

Date Posted: 15 April 2024

Vacancy in the Directorate of Navigation.

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, beliefs, age, disability or other characteristics. Applications from women are encouraged.

This post is classified A2-A4 on the Coordinated Organisations’ salary scale.


ESTEC, Noordwijk, Netherlands


Galileo Constellation Deployment and Replenishment Architect in the Galileo Constellation Analysis Unit, Galileo System Engineering Service, Galileo Programme Office, Galileo and EGNOS Programme Department, Directorate of Navigation.

The Galileo Constellation Analysis Unit is in charge of constellation deployment, replenishment and mission analysis activities for the overall Galileo system deployment, including future Galileo launches and LEOPs, constellation deployment planning, and maintenance and upgrades of the constellation mission analysis facility. The Unit consists of a team of ESA experts, complemented with industry resources.


Under the direct authority of the Head of the Galileo Constellation Analysis Unit, you will be responsible for constellation deployment and replenishment tasks for the Galileo Programme within the project boundaries and constraints:

  • Defining the Galileo Constellation Deployment, Maintenance and Replenishment Plan, which maintains service availability, taking into account satellite deployment constraints, satellite reliability, spare policy and the satellite and launcher procurement plan;
  • Liaising with Programme stakeholders for matters relating to constellation deployment, maintenance and replenishment;
  • Overseeing the definition and implementation of constellation critical requirements over the entire system life cycle, from LEOP to satellite end of life and disposal, to ensure navigation service performances;
  • Driving the Galileo Disposal Orbit Strategy, which ensures compliance with space debris regulations and the long-term exploitability of the constellation orbits;
  • Generating constellation replenishment, orbit and mission analysis products and associated technical notes;
  • Coordinating the tasks carried out by the industry teams in the domain of mission analysis and constellation replenishment;
  • Liaising with the Space Segment Team in its area of expertise, in particular the avionics subsystem, and its contribution to the overall mission objectives and navigation service performances;
  • Liaising with the Ground Segment, Operations and Service Teams in their areas of expertise, in particular flight dynamics;
  • Liaising with the launcher provider, ensuring proper implementation of launcher requirements relating to the deployment of satellites to the Galileo constellation, and proper disposal of launcher orbital stages;
  • Participating in critical operations, such as LEOP, manoeuvres and satellite anomalies, as part of the ESA Project Team;
  • Leading the procurement and maintenance of constellation mission analysis and constellation replenishment tools to perform the analysis needed to accomplish the tasks described above, as required by the Programme;
  • Performing on-site maintenance and evolution of the tools described above in order to maintain a complete overview and control of the Unit’s software infrastructure;
  • Generating lessons learned and contributing to the knowledge management initiatives in the Directorate of Navigation.

You will cooperate closely with the other team members and with other teams within the Galileo Programme, particularly those responsible for satellite platform and ground segment procurement, and operations support.

Technical competencies

Experience in the deployment, maintenance and replenishment of satellite constellations

Experience in mission and spacecraft design

Experience in mission analysis

Experience in astrodynamics software development

Knowledge of ESA Space systems development, verification and review processes and standards

Behavioural competencies

Result Orientation

Operational Efficiency

Fostering Cooperation

Relationship Management

Continuous Improvement

Forward Thinking


A master’s degree in aerospace engineering or another relevant domain is required for this post.

Additional Requirements

A background and substantial experience in GNSS Phase C/D projects and system engineering is considered an asset.

A good background in space system design, manufacturing and testing is also considered an asset.

Knowledge of modern computer systems, programming languages and constellation mission analysis is required.

A deep understanding of constellation aspects of satellite navigation systems, such as Galileo and GPS, is also required.

You should have good leadership, interpersonal and communication skills. You should have the ability to work autonomously, effectively and cooperatively in a diverse, international team environment, defining and implementing solutions in line with team and individual objectives and project deadlines. You should also have good technical, analytical, organisational and reporting skills, a proactive attitude to solving problems and an interest in innovative technologies.

Other Information

For behavioural competencies expected from ESA staff in general, please refer to the ESA Competency Framework.

For further information please visit: Professionals, What we offer and FAQ

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.

Applicants must be eligible to access technology and hardware which is subject to European and US export control regulations.

Applicants must be eligible for security clearance by their national security administrations.

The Agency may require applicants to undergo selection tests.

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 email

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

According to the ESA Convention, the recruitment of staff must take into account an adequate distribution of posts among nationals of the ESA Member States*. When short-listing for an interview, priority will first be given to internal candidates and secondly to external candidates from under-represented Member States*.

In accordance with the European Space Agency’s security procedures and as part of the selection process, successful candidates will be required to undergo basic screening before appointment conducted by an external background screening service.

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.

  • Member States, Associate Members or Cooperating States.