SR MECHANICAL  ENGINEER-Water Treatments Plants – MADRID

Due to continued expansion, we are now seeking a Senior Mechanical Engineer to join our project engineering team and support ongoing developments in the Data Centre and Industrial Water Treatment sectors.

This is a key technical position offering the opportunity to deepen expertise in mechanical and process design, working on the full lifecycle of engineered systems delivered to high-profile international clients.

The selected candidate will participate in concept development, mechanical design, equipment specifications, and technical coordination throughout manufacturing, FAT, installation and commissioning phases.

Main Responsibilities:

  • Develop and review mechanical engineering documentation ensuring compliance with international standards and internal quality procedures.
  • Produce and evaluate P&IDs, process schematics and mechanical flow diagrams aligned with project requirements.
  • Size and specify pumps, pressure vessels, heat exchangers, pipework, valves, filtration systems and mechanical equipment for water treatment applications.
  • Prepare detailed equipment data sheets, materials requisitions (MRs) and technical bid tabulations.
  • Develop mechanical deliverables including: Pipe routing layouts, piping isometrics, general arrangement drawings (GA), bill of Materials (BOM) and MTOs, support design and structural requirements for skid-based modular systems.
  • Ensure that all mechanical designs meet relevant codes (e.g., ASME, EN, PED, ISO, API).
  • Validate technical compliance from vendors and participate in design reviews.
  • Support HAZOP / HAZID assessments for mechanical and process safety.
  • Work closely with the Process, Electrical, Automation and Manufacturing teams to ensure coherent technical integration.
  • Provide engineering support during fabrication, assembly, testing (FAT/SAT), installation and commissioning.
  • Coordinate with suppliers to clarify specifications and resolve technical deviations.