Principal Mechanical Engineer - Process Plant Design Lead

WSP in the UK & Ireland; Cardiff; On-site; GBP 75,000 - 110,000; Full time

Job summary

WSP is seeking a Principal Mechanical Engineer to lead mechanical design and delivery for process projects in fine chemicals, food and pharmaceutical sectors, based in Cardiff. You will drive technical excellence, manage scope, cost and schedule across all project stages.

You will oversee piping, 3D modelling, data sheets and site support during construction and commissioning, coordinating with multi‑discipline teams and ensuring compliance with industry codes.

Qualifications

• Degree qualified in mechanical engineering (BEng, BSc, MEng).
• Chartered Engineer or MIMechE desirable.
• Experience in mechanical design engineering in process industries.
• Experience with process plant piping design and specification.
• Knowledge of CAD and 3D modelling software.
• Familiarity with piping design codes (ASME B31.3/BS EN 13480).
• Construction site experience on process industry projects.
• Experience managing or coordinating design and engineering teams.

Responsibilities

• Lead mechanical engineering on projects, controlling technical delivery, costs, changes and programme at all stages.
• Design, engineering, calculations and specifications.
• Assist with preparation of flowsheets and engineering line diagrams.
• Supervise plant layout and pipework design including 3D modelling.
• Generate and supervise preparation of data sheets, piping and equipment specifications.
• Provide site support during construction and commissioning, including field engineering assignments.
• Conduct design studies, safety reviews and Designers Risk Assessments.
• Coordinate with all other disciplines.
• Prepare cost estimates and maintain man‑hour/resource forecasts.
• Prepare and contribute to design programmes.
• Review designs & proposals for conformance with regs, standards, and codes.
• Comply with the company’s quality and safety procedures.
• Line‑manage and supervise graduate engineers.

Skills

CAD

3D modelling

Piping design

Project leadership

Team management

Client liaison

Cost control

Regulatory compliance

Education

Degree in mechanical engineering

Chartered Engineer desirable

Tools

Caesar II

AutoCAD

PDMS/AVEVA

Job description

WSP is seeking a Principal Mechanical Engineer to lead mechanical design and delivery for process projects in fine chemicals, food and pharmaceutical sectors, based in Cardiff. You will drive technical excellence, manage scope, cost and schedule across all project stages.

You will oversee piping, 3D modelling, data sheets and site support during construction and commissioning, coordinating with multi‑discipline teams and ensuring compliance with industry codes.