Mechanical Design Engineer – Siemens NX

ALTEN is a global engineering and technology consultancy operating across over 35 countries worldwide. We partner with industry leaders across sectors including Aeronautics, Aerospace, Defence, Naval, Automotive, Energy, Rail, IT and many more to deliver innovative engineering solutions that drive technological advancement & support sustainable transformation.

Our teams of passionate and agile engineers work on cutting-edge projects that shape the future of technology and sustainability. At ALTEN, we empower talented engineers to innovate, solve complex challenges, and deliver impactful solutions that build tomorrow’s world—today.

Join us and start building tomorrow’s world today!

ALTEN is looking for an experienced Mechanical Design Engineer to join our engineering team, supporting an exciting and technically challenging engineering programme.

This opportunity would suit a Mechanical Design Engineer with strong Siemens NX experience who is confident developing detailed 3D designs and engineering drawings within a complex engineering environment.

• Location:
  Bicester
• On Site:
  Onsite

Key Responsibilities:

• Develop and modify 3D mechanical designs using Siemens NX
• Produce accurate 2D engineering drawings to support manufacture and assembly
• Design mechanical components and assemblies in line with engineering requirements
• Work closely with engineering, manufacturing and technical teams throughout the design lifecycle
• Review existing designs and implement engineering modifications where required
• Ensure designs meet relevant quality, manufacturing and technical standards
• Support design reviews and resolve technical issues during development

Required Skills:

• 3+ years’ experience within Mechanical Design, CAD Engineering or a similar role
• Experience within the Aerospace Industry
• Strong hands‑on experience with Siemens NX – mandatory
• Experience creating detailed 3D models and 2D manufacturing drawings
• Good understanding of mechanical engineering and design principles
• Experience working with mechanical components and assemblies
• Ability to interpret technical specifications and engineering requirements

Required Qualifications:

• A Bachelor’s or Master’s degree in Engineering
  , or
  equivalent
  military experience
  .
• Experience with in a highly regulated or complex engineering environment
• Knowledge of GD&T and engineering tolerancing
• Understanding of manufacturing processes and design for manufacture
• Experience supporting designs from concept through to production

We bring together entrepreneurial, tech-driven people to deliver innovative solutions for leading companies.

At ALTEN, you’ll work on exciting projects, supported by ongoing learning, mentoring, and clear career development tailored to your goals.

Join a passionate team and help build tomorrow, today.

• A personalised career path and a rewarding management style
• A huge diversity of engineering projects and industries
• Private Medical Insurance
• Employee assistance programme
• Life insurance & Pension Scheme
• Social atmosphere, regular gatherings &team buildings
• Flexible way of working (role dependent)

We are proud to support the Armed Forces Covenant & actively encourage applications from members of the Armed Forces community, including veterans, reservists, service leavers, and military spouses/partners. We recognise the value of military skills and experience and are committed to ensuring that no applicant is unfairly disadvantaged during our recruitment and selection processes.

ALTEN is committed to fostering a diverse and inclusive workplace and values the strength that comes from a global mix of backgrounds and perspectives. We welcome applications from all suitably qualified candidates, regardless of background or protected…