Principal Software Engineer - Controls 3 Positions available £67.47 per hour (Inside IR35) 12 months 2-3 days a week on site - LA14 Join our client and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future, for all of us. The PMS system is one of the most important elements of the Dreadnought Class Submarine as it provides central controls and indication for vital systems on board the submarine, such as the reactor plant and secondary propulsion systems. As a Principal Engineer , you will be working within the software engineering team within our Barrow site working in the full lifecycle for safety critical software from design through implementation and unit testing. Our principal engineers are key members of the team and are responsible to the engineering manager for the delivery of packages of work, this includes the leadership/mentorship of engineering staff. You will possess excellent verbal and written communication skills, with the ability to successfully engage with a variety of stakeholders at all levels. You must also be a good problem solver who is able to use initiative to improve processes and develop effective solutions. Your main responsibilities as a Principal Software Engineer will involve: Design of Safety CriticalPLC and SCADA application software for the Dreadnought PMS System Development of safety critical Software for PLC and SCADA based control systems Testing of Safety Critical Software modules prior to handover to the system testing team Configuration of software builds to support testing activities at all levels Configuration management Liaising with the engineering teams and external clients Knowledge: Experience of software and equipment development Experience of working with the following PLC and SCADA products Siemens S7-1500 utilising TIA Portal WinCC OA SCADA Rockwell Controllogix GE Mark ViES PLC Trinity(Honeywell) iDefine modelling Experience of: Submarine, Marine, Nuclear, Defence, Pharmaceutical control system design and manufacture Interface specification test and commissioning including RS422, RS232, Analogue and Digital interfaces would be desirable