I started working for LUNS in the systems team when there were only two other members of that team. We also had a team of network engineers who were all employed by Lancaster University to work on the CLEO project (Cumbria and Lancashire Education Online - a project run by Lancashire county council to provide networking for the schools in Cumbria and Lancashire). LUNS didn't exist as a company at that time. Since then, I have been with LUNS through its transition to a real company and its expansion to an organisation with about 35 staff of its own.
Within LUNS I work for the systems team performing software development and systems admin functions. We work mostly with Debian GNU/Linux and write our own deb packages to make deployment simpler. We also use a configuration management system that started life as a Cambridge University project but has been extensively enhansed by LUNS and we developed our own configuration templates (as Cambridge hadn't released those as open source).
In addition to CLEO, LUNS provides systems for Cumbrian schools, libraries in the area and others. Among the many varied projects I have worked on are such things as video conferencing, web cacheing, web filtering, delivering email (which I wrote the maintenance interface for), web servers, DNS servers, secure log shipping.
One large project that we undertook was to deliver a filtering and content box to those schools that opted into the project. The NED is a centrally managed box which is physically situated within the school. It can provide web filtering and caching (to complement that which is done centrally by us for CLEO) and educational content such as Espresso or Knowledge Box.