The Key Person shall have the following mandatory attributes and skills:

• A university degree in a relevant technical discipline (i.e., flight dynamics engineer, software engineer, computer science etc.) or the equivalent work experience
• Knowledge of the analytical principles for orbit determination and control
• Experience with Environmental Flight Dynamics Models
• Hands-on experience in propagation methods, orbit design and manoeuvre optimization for LEO and GEO missions
• Knowledge of application tools and libraries, with special emphasis on Orekit
• Experience in Software engineering and development, including the use of relevant IDE (e.g. VSCode) and source code and version control tools (Git in particular)
• Proven experience in software development with Python in Linux
• A systematic approach to work, including the ability to plan the work and cope with tight schedules and multiple tasks
• Ability to learn and develop the needed skills and knowledge to contribute to the implementation of the service
• Willingness to work within a multidisciplinary context in cooperation with other teams. 
• Write accurate and consistent technical documentation.
• Fluent in English (communication and writing skills)

Furthermore, it would be a distinct advantage for the key person to have experience with some of the following:

For Mission Analysis and Flight Dynamics Environment models, knowledge of:

• Rotation and reference systems (IAU, IERS)
• Planetary ephemeris (JPL or analytical/astronomical almanac)
• Force models for Flight Dynamics and Mission Analysis applications
• Signal transmission models
• Applicable standards (i.e. ECSS, ISO and CCSDS)

For propagation methods and orbit design for LEO and GEO missions, the experience of:

• Numerical propagation with perturbation forces
• Analytical or semi-analytical approximations, including TLEs and use of SGP4
• Orbit design for Earth Observation LEO satellites (sun-synchronous)
• Orbit design for Earth Observation GEO satellites (geo-synchronous)
• Constellation design (such as to fulfil revisiting or Earth coverage requirements)
• Orbit acquisition and tandem formation at the LEO regime
• Orbit acquisition at GEO regime, and in particular based on GTO (GEO Transfer Orbit)
• Orbit determination (radio-tracking, GNSS-based, with pointing information)
• Orbit control (station-keeping techniques for LEO & GEO satellites), including manoeuvre optimization and co-location
• Disposal design for LEO (re-entry to the target area, or to 25-year decay orbit, or not to re-enter protected region after disposal) and for GEO Geometric event estimation (eclipses, node crossings, antenna visibilities… but also moon or sun in FOV, point or area overfly)
• On-board attitude and orbit control system, mainly in terms of sensors and actuators as well as body-fixed reference frames for Earth Observing satellites (e.g. local normal geodetic pointing with yaw steering)
• Modelling of Earth Observation mission performances, e.g. spatial coverage, revisiting frequencies, on-board data latencies or timeliness

For Application tools and libraries (in the area of Mission Analysis and Flight Dynamics, proven experience of;

• Orekit, low-level space dynamics library
• Orekit-based developments of relevance for LEO and/or GEO missions
• ESA’s Navigation Package for Earth Observing Satellites (NAPEOS)
• GODOT’s ESA/ESOC Flight Dynamics software

For Software engineering and development experience;

• Software specification, design, implementation, verification & validation, and software maintenance, with a focus on agile practices
• Software development tools, including relevant IDE, source code and version control tools (i.e. git), non-regression testing, code quality checkers as well as bug or issue tracking and project management tools Continuous Integration (CI) / Continuous Development (CD), including structuring automated processes through pipelines, including automated quality checking, build, testing and deployment

For Development platform has proven experience of;

• Beside Linux, Windows, containerized applications

For Software development languages and tools experience of;

• Additionally Fortran, C/C++, MatLab/Simulink