Who Are We?

Excellon Systems was established as a software house based close to Kings Lynn, in West Norfolk to not only produce quality software systems, but also to offer software development and technical authoring services to businesses. Ultimately we want to provide our experience in developing software solutions to resolve your business problems.


We have extensive knowledge and experience of developing and documenting software using standards such as ISO 9001:2008 and RTCA DO-178B. We believe if applied in the correct way such standards enable quality systems to be produced in a cost effect and timely manner. However if approached from the outset as a burden or waste of time this is exactly what these standards can become.

Quality Assurance

With a lot of companies testing is considered only as an after thought, and performed to fulfil regulatory requirements. Here at Excellon Systems we take the view that testing is an equally important part of the development process. We therefore plan the required testing for a system as early as possible within the project lifecycle.



Graham worked in the avionics industry for many years producing quality software for critical and real time systems such asThe Flight Control Computer for the Typhoon European Fighter aircraft as well as other aircraft systems such as moving map navigational equipment.

A significant part of his work involved developing software tools to aid with software processes inline with applicable standards. This has enabled him to experience software application development as both a customer and a developer.