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Principal Mechanical Engineer


Bristol, GB, BS16 1EJ Devonport, Plymouth, GB, PL1 4SG Rosyth, Dunfermline, Kirkcaldy, GB, KY11 2YD

Onsite or Hybrid:  Hybrid

Job Title:              Principal Mechanical Engineer
Location:              Bristol, Rosyth or Plymouth
Compensation:    Competitive Salary + Benefits
Role Type:           Full time / Permanent
Role ID:               SF52602


At Babcock we’re working to create a safe and secure world, together, and if you join us, you can play your part as a Principal Mechanical Engineer.


The role

As a Principal Mechanical Engineer, you’ll have a role that’s out of the ordinary. You’ll be part of our ME&S business unit who are a leading design consultancy providing naval architecture, marine, system engineering, electrical engineering design and project support services to the marine and defence markets worldwide.  ME&S Engineering have vast experience in engineering, construction, concept design and through life support for a wide range of front line naval and auxiliary support vessels.
Day to day, you’ll be responsible for authoring, reviewing and substantiating Marine and Mechanical designs through calculations, simulations, commissioning and diagnostic test support. You’ll be required to contribute and lead product development throughout the design lifecycle and provide technical support to our key customers, ensuring efficient and effective delivery of engineering outputs. 


  • Primary deliverables are substantiation reports/designs for installation solutions; this can include development/analysis and/or verification/validation of Power and Propulsion designs, development of Auxiliary Ship Systems and/or HVAC for existing and new build/concept designs.
  • Preparation and production of substantiation reports for solutions during the entire design lifecycle phases (Concept, Basic, Functional, Detail, Manufacturing, Installation and Decommissioning), in line with recognised standards and to the required time, cost and quality requirements.
  • Lead design teams and other stakeholders throughout the design lifecycle to ensure coordination and functionality of design, including supporting design reviews, and act as Technical Authorities within their area of expertise.
  • Develop innovative design solutions with robust engineering substantiation.
  • Provide solutions to manufacturing and installation issues by assisting in the resolution of technical and production queries.
  • Produce, approve and authorise technical reports and other documentation.
  • Be aware of and ensure that, health, safety and environmental requirements are implemented.
  • Assist with the maintenance and improvement in quantity standards of outputs.
  • Provide mentoring support to less experienced team members to support both their effective working, and their professional development.


Essential experience of the Principal Mechanical Engineer:

  • The PME is required to have a high level of developed knowledge, the role is directly accountable for design development, and determines solutions to problems and issues within their specialist subject area.
  • Provides help and direction to less experienced team members to support both their effective working, and their development. Although not essential, defence related design experience and demonstrable experience in appropriate analytical software such as FEA, CFD and/or CAD would be an advantage, as would experience of Power and Propulsion systems, Auxiliary Systems and HVAC.


The role is full time, 37-hours per week, with a flexible, hybrid working arrangement. Typically, you will be required to be on site two days per week however this can fluctuate depending on business needs. 


Qualifications for the Principal Mechanical Engineer:

  • Ideally degree qualified but HND/HNC level qualification in an engineering discipline with extensive experience in relevant field will be considered.



The successful candidate will hold, or be eligible to achieve SC security clearance.


Our Benefits

  • Generous holiday allowance 
  • Matched contribution pension scheme up to 8% of salary, with life assurance
  • Employee share scheme 
  • Employee shopping savings portal
  • Payment of Professional Fees
  • Reservists in the armed forces receive 10-days special paid leave 
  • Holiday Trading is a benefit that allows the majority of employees to buy additional leave or to sell up to one working week of annual leave from their annual entitlement
  • ‘Be Kind Day’ enables employees to take one working day's paid leave a year (or equivalent hours) to undertake volunteering work with their chosen organisation or registered charity


Babcock International 


For over a century Babcock International have helped to defend nations, protect communities and build a better world. To continue, we must adapt, advance and be a sustainable business with a shared goal. 


If you have a disability or need any reasonable adjustments during the application and selection stages, please let us know. We’re committed to building an inclusive culture where everyone’s free to thrive. We are happy to talk about flexible working - please ask about alternative patterns of work at interview.





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