Alstom is the UK and Ireland s leading supplier of new trains and train services, and a leading signalling and rail infrastructure provider. Alstom have built, or are building, just under 40% of the UK mainline train fleet; as well as the entire fleets in service with London Underground and Dublin Luas. We provide the widest range of smart solutions in the rail market, from innovative high-speed rolling stock, metros and trams to maintenance, modernisation, infrastructure and signalling. Employing 6000 people, we design and build trains at Derby, the UK s largest train factory; and operate major sites at Widnes, Crewe, Ilford and Plymouth, and 30 train services depots across the UK and Ireland. Could you be the full-time Principal Systems Engineer in Hatfield we re looking for? POSITION OVERVIEW The succesful candidate will participate in the development, adaptation, introduction and systems delivery elements of SSI and SMARTLOCK systems and processes (SML 400, MooN, Smart Gateway, SmartIO, Support System, Test Environment, AutoTesting) for signalling systems in the UK and Ireland.They will also engage in the development and / or improvement of tools and processes within the business including requirements capture, planning, specifications, design, implementation, testing and roll out. Assist in ensuringthat tools and processes remain fit for purpose and enable continuous improvement of them by leading regular reviews and proactively suggesting and implementing improvemen