Mechanical Engineer for the CMS High-Granularity Calorimeter (EP-CMS-EC-2026-190-LD)

<p><strong>Introduction:</strong></p><p>As a Mechanical Engineer, you will contribute to the development, procurement, assembly, testing and installation of innovative mechanical structures for the High Granularity Calorimeter (HGCAL) of the <a href="https://cms.cern/" rel="noopener noreferrer">Compact Muon Solenoid experiment</a>, working with advanced materials and challenging structural and thermal requirements.</p><p>You will help oversee the surface assembly and testing of the 250-tonne detector, including its CO<em>?</em>&nbsp;cooling, dry gas, cabling and fibre services, as well as its installation and commissioning 100 metres underground. Working in a multinational, multidisciplinary team, you will apply your expertise in structural and thermal calculations, finite element analysis and 3D CAD.</p><p><strong>Functions:</strong></p><ul><li>Coordinate a team of technicians in assembling and testing the steel structures of HGCAL, comprising more than 200 tonnes of steel plates per endcap.</li><li>Provide engineering support for all activities at CERN related to the large-scale active detector components, known as “cassettes” (30–60-degree segments of circular structures with diameters of up to 5 m). This will include the cold testing of “electromagnetic cassettes” and their subsequent stacking with lead plates to form the complete electromagnetic endcaps.</li><li>Integrate the hadronic cassettes into the steel structures and provide support for their testing.</li><li>Integrate the electromagnetic (30 tonnes) and hadronic (200 tonnes) sections, including their cabling and piping, and support subsequent large-scale testing on the surface.</li><li>Help oversee the lowering of the HGCAL endcaps into the CMS cavern and their connection to CMS, including the connection and testing of services.</li></ul>

<ul><li>Master's Degree or equivalent relevant experience in the field of Mechanical Engineering or a related field.</li></ul><p><strong>Experience:</strong></p><ul><li>Strong track record in planning and coordinating the handling, assembling and testing of large mechanical structures.</li><li>Demonstrated experience in performing thermal and structural calculations of complex mechanical structures using finite element analysis.</li><li>Demonstrated experience in developing mechanical assemblies using 3D CAD.</li><li>Ability to work successfully and efficiently within multinational, multicultural teams of engineers, scientists and technicians would be an advantage.</li></ul><p><strong>Technical competencies:</strong></p><ul><li>Assembly of mechanical structures and equipment: knowledge of usual manufacturing methods (milling, turning, etc.), assembly methods (bolted, welding, etc.).</li><li>Knowledge and application of mechanical measurement techniques: including quality control methods.</li><li>Assembly and integration of detectors: capability to develop and validate manufacturing and installation methods.</li><li>Production of 2D drawings and 3D models: proficiency in Catia V5 or equivalent 3D modelling software, good knowledge of drawing annotations.</li><li>Knowledge and application of numerical modelling applied to mechanics.&nbsp;</li><li>Proficiency in ANSYS would be a strong asset.</li><li>Basic understanding of process engineering systems (i.e. cooling plants) would be an asset.</li></ul><p><strong>Behavioural competencies:</strong></p><ul><li>Managing Self: working well autonomously; taking on activities and tasks without prompting.</li><li>Solving Problems: adopting a pragmatic approach; understanding the value of adopting generic rather than 'gold -plated' technical solutions.</li><li>Working in Teams: working well in groups and readily fitting into a team; participating fully and taking an active role in team activities.</li><li>Communicating Effectively: delivering presentations in a structured and clear way; adjusting style and content to the audience; responding calmly and confidently to questions.</li><li>Demonstrating Flexibility: adapting quickly and resourcefully to shifting priorities and requirements.</li></ul><p><strong>Language skills:</strong></p><ul><li>Spoken and written English, with a commitment to learn French.</li></ul>