Avionics System Test Engineer

SII Group; West of England; On-site; GBP 45,000 - 65,000; Full time

Job summary

SII Group in the United Kingdom is seeking a Systems Test Engineer to contribute to aerospace integration and validation programmes across ground and flight-based verification activities.

You will work with cross-functional teams, analyse large data sets, generate technical documentation, and adapt to tight deadlines while continuously adopting new testing tools.

Qualifications

• Aerospace or high‑integrity engineering background.
• Experience in system verification, validation, or performance testing.
• Experience in processing and reporting engineering data.
• Fault diagnosis or investigative engineering experience.
• Familiarity with live testing environments is a plus.

Responsibilities

• Execute system‑level validation across subsystems in a live engineering environment.
• Support end‑to‑end airborne test campaigns, from preparation to test operations.
• Generate structured technical documentation of results and observations.
• Analyse large datasets using statistical techniques and engineering judgement.
• Investigate anomalies and contribute to root‑cause investigations.
• Collaborate with design, operations, and validation specialists to communicate findings.
• Work under tight deadlines and adapt to shifting priorities.
• Adopt new tools and digital capabilities to enhance testing efficiency.

Skills

Aerospace systems knowledge

Adaptability to new tools

High-pressure delivery

Excel data manipulation

Technical communication

Data processing (signal analysis)

Python for automation

Job description

We are seeking a highly motivated Systems Test Engineer to contribute to complex aerospace integration and validation programmes. This position involves working within a multidisciplinary engineering environment to support ground and flight-based verification activities across critical aircraft systems. The role offers exposure to cutting‑edge testing methodologies, data‑driven engineering, and fast‑paced operational delivery.

• Execute system‑level validation activities across mechanical and fluid‑based aircraft subsystems within a live engineering environment.
• Support the end‑to‑end lifecycle of airborne test campaigns, including preparation, configuration verification, and active participation during test operations.
• Generate comprehensive and well‑structured technical documentation, capturing test results, observations, and engineering insights.
• Analyse large datasets obtained from testing activities, applying statistical techniques and engineering judgement to interpret system behaviours.
• Investigate anomalies identified during testing, contributing to structured troubleshooting processes and supporting root‑cause investigations.
• Work closely with cross‑functional teams, including design, operations, and validation specialists, to communicate technical findings and propose solutions.
• Operate efficiently under tight deadlines, adapting to shifting priorities within a dynamic project environment.
• Continuously adopt new tools, digital capabilities, and engineering approaches to enhance testing efficiency and output quality.

Skills

• Strong foundational knowledge of aerospace systems and their operational principles.
• Ability to quickly understand and adopt new tools, workflows, and internally developed systems.
• Resilience and adaptability when working in high‑pressure, delivery‑focused environments.
• Advanced data manipulation and analysis capability, particularly using Microsoft Excel.
• Clear and precise technical communication skills, with a focus on structured reporting.
• Analytical mindset with exposure to data processing techniques such as signal analysis and mathematical modelling.
• Programming capability (e.g. Python or similar) for automation, data handling, or analysis is advantageous.

Experience

• Demonstrated experience within an aerospace or high‑integrity engineering environment.
• Involvement in system verification, validation, or performance testing activities.
• Background in processing, interpreting, and reporting on engineering data.
• Practical experience in fault diagnosis, troubleshooting, or investigative engineering tasks.
• Exposure to integrated system testing or operational test environments is beneficial but not essential.