Control Systems Software Engineer

Location: London (Hybrid)Clearance: SC Cleared To apply, email: or call

An opportunity for an experienced Control Systems Software Engineer to work on mission-critical naval platform management systems within a highly regulated defence environment. The role covers full lifecycle development and in-service support of safety-critical PLC and SCADA/HCI solutions supporting the UK submarine fleet.

• Produce functional and design specifications for control system software

• Design, develop, and maintain high-quality, maintainable code

• Capture, interpret, and refine customer and system requirements

• Develop and implement PLC and SCADA/HCI applications

• Integrate data communications with third-party equipment

• Produce technical documentation to internal and customer standards

• Support and conduct Factory Acceptance Tests (FATs)

• Contribute to in-service and through-life system support

• Ensure compliance with company policies, safety, and statutory requirements

• Experience developing client-server applications

• Strong computer science fundamentals (OOP, data structures, algorithms)

• Programming experience in C++, C#, or Java

• Control systems and graphical user interface development experience

• Familiarity with unit testing frameworks

• Experience with software configuration management and version control

• Industrial Ethernet communication protocols and networking standards

• Hands-on PLC integration experience (Rockwell and/or Siemens)

• Minimum 2 years in a software engineering environment

• Degree, HNC, HND, or equivalent in Software, Systems, or Electrical/Electronic Engineering

• Understanding of Functional Safety standards (BS EN 61508, 61511, 62061)

• Experience within Defence, Maritime, Aerospace, or similarly regulated sectors (Oil & Gas, Pharma, Petrochemical)