I have worked in the IT industry since 1998 working on both Windows servers starting from NT3.51, exchange, iis etc. Also Linux machines from kernel version 1.2, with the various version of web servers, mail servers, database services that have run and do run on the linux kernel.
I have also been installing routers and switches from various manufactures from the same time, for example, cisco, zyxel, mikrotik (from the early days of the company), Ubiquity etc.
I have also been working with VOIP and developing solutions based on Asterisk.
I started as a mechanical, electrical and electronic engineer before working in the IT industry, and still produce bespoke computer controlled devised for remote monitoring system.