Mechanical Design Engineer

ALTEN; Belfast City District; On-site; GBP 45,000 - 55,000; Full time

Benefits offered by this job

Private Medical Insurance

Employee assistance programme

Life insurance & Pension

Team building events

Flexible working

Career development

Job summary

ALTEN is seeking a Mechanical Design Engineer to support defence and security systems in a highly regulated engineering environment. You will deliver detailed mechanical designs, produce compliant documentation, and work with multidisciplinary teams from concept through manufacture.

The role is based in Belfast with an on-site requirement of 2–3 days per week and 5+ years of experience. Security clearance eligibility is required.

Qualifications

• Experience in mechanical design within defence or regulated industries.
• Strong fundamentals in mechanical engineering and product development.
• Experience producing detailed mechanical designs and documentation.
• Proficiency with CAD tools and CAE applications.
• Engineering drawings to BS 8888 standards.
• Knowledge of BOM management and configuration control.
• Ability to deliver work packages and collaborate with multidisciplinary teams.
• Strong problem-solving and communication skills.

Responsibilities

• Lead mechanical design work packages from concept to manufacture.
• Produce detailed mechanical designs using CAD/CAE tools.
• Maintain product documentation per established engineering processes.
• Collaborate with multidisciplinary stakeholders to ensure robust, manufacturable, and compliant designs.
• Lead design reviews and manage engineering changes.

Skills

Mechanical design

CAD tools

Engineering documentation

BOM / configuration

Regulated industries

Education

Bachelors or Masters in Engineering

Technical military background

Tools

CAD tools

CAE applications

Job description

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

Company Description

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!

Job Description

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.

Qualifications

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.

Additional Information

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 MedicalInsurance
• 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 characteristics under the Equality Act 2010. If you require any reasonable adjustments during the recruitment process, please let us know.

This role may require you to have or be willing to go through Security Clearance. As part of the onboarding process candidates will be asked to complete a Baseline Personnel Security Standard; details of the evidence required to apply may be found on the government website Gov.UK. If you are unable to meet this and any associated criteria, then your employment may be delayed, or rejected . Details of this will be discussed with you at interview.