Job Description

Line Up Aviation is a specialist aviation and aerospace recruitment company that has been operating worldwide for more than 35 years. We work with some of the industry's best-known companies who demand the highest standard of service. On behalf of our global aircraft modifications client, we are currently recruiting a Mechanical Stress Engineer primarily to deliver structural substantiation documentation for interior modifications and associated interfaces to demonstrate compliance with relevant regulatory and customer requirements and procedures defined in the company's Design Organization Handbook.

To be successful in your application you will need to hold UK working rights at the time of application, sponsorship is not available.

Job Title: Mechanical Stress Engineer

Location: Frimley, Surrey

Employment Type: Contract 12 months, inside IR35

Working time: Mon -Friday only

Package: Competitive hourly Rate, possible Hybrid (3 days a week onsite)

Scope of Role

Primary focus: Delivery of substantiation documentation for aircraft interior modifications (seating, monuments, LOPAs, PSUs, LRUs, etc.)

Reporting line: Structures Engineering Manager

Collaboration: Work with global engineering teams across multiple time zonesKEY RESPONSIBILITIES:

Act as a contracted technical resource reporting to the Structures Engineering Manager and collaborating with global engineering teams to identify certification requirements and define substantiating solutions for active and upcoming interior modification programmes.

Lead and deliver certification activities and structural substantiation documentation to ensure compliance with design and airworthiness requirements

Compile, author and critically review structural substantiation documentation including but not limited to:

Product certification and integration substantiation for:

New seating installations

New monuments and furniture installations (galleys, lavatories, class dividers, first-class suites, VVIP furnishings)

Cabin interior changes such as LOPAs, Passenger Service Unit (PSU) layouts, LRU installations and other interior reconfiguration items

Related primary-structure considerations where applicable (e.g., antenna installations, fuselage cutouts) to the extent they affect interior substantiation

Provide detailed calculations, stress reports, load paths and justification that meet regulatory and company DOH expectations.

Support customer-facing certification meetings (ITCM, PDR, CDR, FAI) as clients contracted representative

Ensure documentation is auditable, traceable and structured for regulatory review and customer approval.

Promote a culture of safety, quality and continuous improvement within the engineering organization while operating in a contingent worker capacity.DELIVERABLES (examples):

Complete structural substantiation reports for interior modifications consistent with DOH templates and certification plan

Hand calculation packages and Finite Element Analysis (FEA) models and results

Certification compliance matrices, load cases and assumptions recordsMINIMUM QUALIFICATIONS:

Bachelor's degree in aerospace, Aeronautical or Mechanical Engineering (or equivalent).

Minimum of five (5) years' relevant experience in aircraft structures/stress, with demonstrable recent experience in modification substantiation (preferably interiors).SKILLS / EXPERIENCE:

Recent experience working with an EASA Part 21J Design Organisation (or equivalent) is highly desirable.

Substantial knowledge of aircraft interior modification practices, installations and interfaces; familiarity with primary and secondary aircraft structures related to interior modifications.

Proficient with hand calculations using classical stress analysis techniques and able to justify assumptions clearly.

Proficient in Finite Element Analysis (FEA) tools and able to produce traceable models and results.

Strong technical report writing skills with experience producing certification-ready substantiation packages.

Working knowledge of EASA and FAA airworthiness requirements relevant to stress/structures (e.g., CS-25, FAR 25, ETSO/JTSO where applicable).

High attention to detail, professional integrity and ability to work to contractual schedules.

Ability to manage multiple programmes concurrently, prioritise workloads and adapt to changing project demands.

Excellent communication skills for technical engagement with internal and external stakeholders.This is a UK based opportunity, to be successful in your application you must already have the rights to live and work in the UK, sponsorship is not available