Mechanical) Stress Engineer Aircraft Modifications

Indotronix UK; Frimley; Hybrid; GBP 60,000 - 90,000; Full time

Job summary

Indotronix UK seeks a Mechanical Stress Engineer for Aircraft Modifications to deliver structural substantiation and certification for interior cabin changes. You will perform stress analyses, develop substantiation reports, and ensure compliance with EASA/FAA rules across global programmes.

Responsibilities include producing hand calculations and FEA models, supporting certification meetings, and collaborating with multidisciplinary teams worldwide to drive on-time delivery while maintaining

Qualifications

• Degree in Aerospace, Aeronautical or Mechanical Engineering.
• Significant experience in aircraft stress analysis or modification substantiation.
• Strong knowledge of aircraft structures, load paths, interfaces and certification requirements.

Responsibilities

• Deliver structural substantiation and certification activities for aircraft interior modification programmes.
• Develop and author certification-ready stress analysis and substantiation documentation for aircraft modifications.
• Perform detailed stress calculations, structural assessments, load path analysis, and engineering justifications to meet airworthiness requirements.
• Support certification of cabin interior modifications including seating, galleys, lavatories, and cabin reconfigurations.
• Produce hand calculations, FEA models, stress reports, compliance documentation, and certification evidence packages.
• Collaborate with multidisciplinary teams across programmes and international locations.
• Maintain accurate, traceable documentation in line with regulatory and company procedures.

Skills

Stress analysis

Certification documentation

FEA (Finite Element Analysis)

Hand calculations

Airworthiness standards

Project coordination

Interdisciplinary collaboration

Technical report writing

Stakeholder management

Education

Aerospace/Mechanical Engineering degree

Tools

FEA software

Job description

For our globally renowned aerospace client, they are seeking a (Mechanical) Stress Engineer Aircraft Modifications to join the client's Commercial Modifications Engineering, supporting the certification and delivery of aircraft modification programmes. The role focuses on providing structural substantiation and certification support for a wide range of aircraft interior modifications, ensuring compliance with regulatory, airworthiness, customer, and organisational requirements. Working within a collaborative global engineering environment, the successful candidate will be responsible for delivering high-quality stress analysis, substantiation reports, and certification documentation in support of both current and future aircraft modification programmes.

• Deliver structural substantiation and certification activities for aircraft interior modification programmes.


• Develop and author certification-ready stress analysis and substantiation documentation supporting aircraft modifications.


• Perform detailed stress calculations, structural assessments, load path analysis, and engineering justifications to demonstrate compliance with airworthiness requirements.


• Support certification of cabin interior modifications including seating installations, monuments, galleys, lavatories, class dividers, premium cabin suites, Passenger Service Units (PSUs), Line Replaceable Units (LRUs), and cabin reconfiguration activities.


• Assess structural interfaces between aircraft interiors and primary or secondary aircraft structures where required.


• Produce hand calculations, Finite Element Analysis (FEA) models, stress reports, compliance documentation, and certification evidence packages.


• Support technical reviews, design reviews, certification meetings, and customer-facing engineering discussions.


• Ensure all engineering documentation remains accurate, traceable, auditable, and compliant with company procedures and regulatory requirements.


• Collaborate with multidisciplinary engineering teams across multiple programmes and international locations.


• Promote engineering excellence, quality, safety, and continuous improvement throughout project delivery.


• Degree qualified in Aerospace, Aeronautical, Mechanical Engineering, or a related discipline.


• Significant experience in aircraft stress analysis, structural engineering, or aircraft modification substantiation.


• Strong knowledge of aircraft structures, load paths, structural interfaces, and certification requirements.


• Experience supporting aircraft interior modification programmes and cabin reconfiguration projects.


• Proficiency in classical stress analysis techniques and engineering hand calculations.


• Experience producing certification-ready structural substantiation reports and technical documentation.


• Proficient in Finite Element Analysis (FEA) and associated modelling tools.


• Working knowledge of EASA and FAA airworthiness regulations, including CS-25 and FAR 25 requirements.


• Experience within an EASA Part 21J Design Organisation environment is highly desirable.


• Strong technical report writing, problem-solving, and analytical skills.


• Ability to manage multiple workstreams and deliver to demanding programme schedules.


• Excellent communication and stakeholder management skills.