Mechanical Design Engineer

• Compensation: GBP 45,000 - GBP 55,000 - yearly

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!

We’re looking for a Mechanical Design Engineer to support the development of complex defence and security systems within a highly regulated engineering environment. You will be responsible for delivering detailed mechanical designs, producing compliant engineering documentation, and collaborating with multidisciplinary teams to develop robust products from concept through to manufacture. This is an opportunity to contribute to mission-critical programmes while taking ownership of technical work packages and design activities.

Location: Belfast
On-site Requirement: 2-3 Days Per Week
Seniority: 5+ Years Experience
Security Clearance: Candidates must be willing and eligible to obtain SC clearance.

Key Responsibilities

• Leverage engineering fundamentals to solve complex technical challenges and support key design decisions.
• Produce detailed mechanical designs using a range of CAD and CAE tools.
• Maintain product documentation in accordance with established engineering processes and procedures.
• Collaborate with multidisciplinary stakeholders to ensure robust, manufacturable, and compliant product designs.
• Perform engineering change activities while maintaining BOM integrity and configuration control.
• Produce engineering drawings in accordance with BS 8888 standards.
• Lead and participate in formal design reviews.
• Undertake and deliver mechanical work packages throughout the product lifecycle.

Required Skills

• Demonstrable experience in mechanical design engineering within defence, aerospace, security, or other highly regulated industries.
• Strong understanding of mechanical engineering fundamentals and product development processes.
• Experience producing detailed mechanical designs and technical documentation.
• Proficiency with CAD tools and supporting CAE applications.
• Experience creating engineering drawings to BS 8888 standards.
• Knowledge of engineering change processes, BOM management, and configuration control.
• Ability to deliver technical work packages and contribute effectively to multidisciplinary engineering teams.
• Strong problem-solving and analytical thinking skills.
• Excellent communication and stakeholder engagement abilities.
• Ability to lead technical discussions and design review activities.
• Collaborative approach to working within multidisciplinary engineering teams.

Required Qualifications

• Bachelor's or Master's degree in Engineering, or relevant technical military background with equivalent experience.
• Experience supporting defence or security-related programmes.
• Understanding of design for manufacture and assembly principles.
• Experience supporting products through manufacture, integration, or qualification activities.
• Knowledge of product lifecycle and configuration management processes.
• Exposure to finite element analysis or other engineering simulation tools.

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

At ALTEN, you’ll work on exciting projects,…