[P128] Liquid Rocket Engine System Engineer

Parque Industrial de Elche (Poligono Industrial), España


 As a Liquid Propulsion Rocket System Engineer at PLD Space, your mission is to contribute to the development of liquid propulsion systems. You will play a crucial role in ensuring the performance, reliability, and safety of the propulsion systems, enabling the successful launch and operation of our MIURA launchers family. 


  • Collaborate with the propulsion team to define and develop liquid propulsion system requirements, considering interfaces definition and evolution, performance and efficiency merits, failure modes and safety aspects. 
  • Define, document, and maintain system requirements, interfaces, and architectures. 
  • Design experiments and conduct hands-on testing to improve system models. 
  • Participate in trade-offs, design, and analysis of liquid propulsion system components, including engines, tanks, pumps, valves, and associated subsystems. 
  • Assist in the integration and testing of propulsion systems, including test bench setups, data acquisition, and analysis of test results. 
  • Collaborate with manufacturing and production teams to ensure the successful fabrication, assembly, and integration of propulsion system components. 
  • Develop and refine inspection, repair/retrofit, assembly and system test procedures based on lessons learned for maximum efficiency. 
  • Support propulsion system qualification and certification activities, including participation in testing, reviews, and documentation. 
  • Contribute to the development and improvement of propulsion system engineering processes, tools, and methodologies. 
  • Collaborate with cross-functional teams, including systems engineers, structural engineers, and avionics engineers, to ensure the seamless integration of propulsion systems with the overall rocket design

Required Knowledge

  • Engineering bachelor’s degree or demonstrable relevant experience in lieu thereof. Advanced degree preferred. 
  • > 5 years of relevant technical experience. 
  • Strong understanding of liquid propulsion system principles, components, and subsystems. 
  • Knowledge of fluid dynamics, thermodynamics, combustion, and propellant chemistry. 
  • Familiarity with rocket engine cycles, propellant feed systems, and ignition systems. 
  • Proficiency in engineering software tools for propulsion system analysis, such as CFD and thermodynamic modeling. 
  • Understanding of structural requirements and constraints related to liquid propulsion systems. 

Required competences

  • Analytical thinking and problem-solving skills to address complex challenges in liquid propulsion system design and optimization. 
  • Strong communication and interpersonal skills to collaborate effectively with cross-functional teams and external partners. 
  • Familiarity with industry standards and best practices for liquid propulsion system design, analysis, and testing. 
  • Knowledge of propulsion system safety requirements and hazard analysis techniques. 
  • Understanding of regulatory requirements and certification processes for propulsion systems. 
  • Ability to work in a dynamic and fast-paced environment, managing multiple tasks and priorities. 
  • Adaptability and willingness to learn new technologies, methodologies, and industry advancements. 
  • Strong documentation skills to ensure clear and comprehensive documentation of propulsion system designs, analyses, and test results. 
  • English B2-C1 

Desired competences

  • Experience in liquid propulsion system engineering for rockets or aerospace applications. 
  • Experience with propulsion system test campaigns and data analysis. 
  • Proficiency in CAD software for propulsion system component design and integration


  • Location: Elche. 
  • Full time position. 
  • Flexibility and willingness to travel domestically and internationally as required. 

Equal Employment Opportunity

Payload Aerospace SL is an equal opportunity employer and does not discriminate against gender, marital status, religion, age, colour, race, sexual orientation, nationality or disability.

We are compromised in maintaining a diverse and free from discrimination working environment where everyone is treated with respect. Employment is based on an individual’s merit and qualifications, directly related to job competence.

These principles are included in all aspects of employment: recruiting, hiring, training, compensation and benefits, and promotion.