Job Description We’re searching for an experienced Lead AIT Enginee r to join our team in Guilford to take ownership of spacecraft and payload Assembly, Integration and Test (AIT) activities throughout the mission ground test phase. This role is central to mission success, guiding hardware from initial build through full system verification and environmental testing. Location: Guilford On Site: 3x days on site Clearance: Not required Experience Level: Senior Key Responsibilities: Lead AIT and EVT planning, scheduling and execution for spacecraft and payload programmes. Work closely with Project Management, AIT and Systems Engineering to deliver fully tested hardware. Coordinate and supervise test operators and responsible engineers. Produce documentation and present at internal and customer reviews. Support bids, proposals and mission planning activities. Oversee unit‑level and system‑level integration and testing. Manage environmental test campaigns and associated logistics. Develop and implement test plans and procedures aligned with system requirements. Act as a spacecraft operations specialist during system‑level testing. Maintain engineering standards, safety practices and cleanroom discipline. Liaise with mission teams and external customers throughout the project lifecycle.