We are recruiting for an experienced Air Traffic Management (ATM) Systems Engineer to join a growing Aviation Consultancy. This role is suited to an engineer with strong experience across ATM / CNS environments and a background in safety-critical systems engineering within regulated aviation domains. You will play a key role in the development, integration and assurance of complex ATM systems supporting UK and international airspace operations. The ATM Systems Engineer will be responsible for: Applying systems engineering principles across the full lifecycle (Concept, Requirements, Design, Integration, Verification and Validation, Acceptance). Develop and manage system requirements (operational, functional and performance-based). Support system architecture definition across ATM and CNS domains. Contribute to safety assessments and regulatory compliance documentation. Support integration and testing of ATM systems within operational environments. Engage with operational stakeholders, regulators and programme teams. Produce high-quality technical documentation in line with aviation standards. Essential Experience: Proven experience within Airports, Air Traffic Management, Air Traffic Control or CNS systems. Strong understanding of ATM architectures (Surveillance, Radar, ADS-B, Voice Communications, Data Processing, Flight Data Systems). Experience working within safety-critical and regulated aviation environments. Knowledge of ICAO, EUROCONTROL, EASA or UK CAA regulatory fr