Senior Mechanical Design Engineer

Assystem

Senior Mechanical Design Engineer developing fluid systems at Assystem. Collaborating with multi-disciplined teams and supply chain on system design.

Posted 5/13/2026full-timeRemote • Sunderland • 🇬🇧 United KingdomSeniorWebsite

About the role

Key responsibilities & impact

Develop 2D CAD drawings, including process flow diagrams (PFD) and process and instrumentation diagrams (P&ID).
Prepare 3D CAD/BIM models, plant layouts, piping design, isometrics, MTO, general arrangement drawings, detail drawings and sketches.
Perform layout optimisation engineering across design phases.
Participate to 3D model reviews, layout reviews, design reviews and technical meetings.
Ensure compliance with required design safety factors, tolerances, specifications, standards, codes, legislation and requirements.
Collaborate with multi-disciplinary engineering teams to ensure a coordinated design.
Maintain records of design process in accordance with sound design practices
Maintain and update databases for CAD/BIM design documentation.
Report status and updates to management line
Support team and maintain required standards and expectations.
Meet targets, quality, time and budget constraints.
Support and mediate solutions and issues with resolution with all stakeholders being aligned.
Ensure adherence to the company statutory H&S Policies and rules and compliance with the project and Quality.

Requirements

What you’ll need

Previous experience as a Mechanical Design Engineer or a similar role
Ability to work within the engineering team to realise designs
Familiarity with 2D CAD systems (AutoCAD) for drawing creation
Familiarity with 3D CAD/BIM systems (Revit, Inventor, Solidworks, Solid Edge, Siemens NX, PDMS, AutoCAD Plant 3D or similar) for model and drawing creation
Professional qualification in an engineering related field
SC Clearance or capable of achieving it
Good communication skills, written and oral
Focus on delivering quality output to time and budget
Act with integrity and instils this in others
Ability to work with a good degree of independence, using their own initiative and self-motivation
Flexible, agile to the role needs, to maintain delivery targets
Confident in being suggestive to alternative solutions that provide safety, time, cost and quality solutions
Team player
Ability to manage own time and to deliver within agreed timescales.

Benefits

Comp & perks

Attractive social benefits, including an engaging Employee Committee and holiday bonuses
Ongoing training with numerous career opportunities.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

2D CAD3D CADBIMpiping designprocess flow diagramsprocess and instrumentation diagramslayout optimisation engineeringMTOgeneral arrangement drawingsdetail drawings

Soft Skills

communication skillsteam playerself-motivationintegrityflexibilityinitiativetime managementproblem-solvingcollaborationquality focus

Certifications

professional qualification in engineeringSC Clearance