I am an engineer who ended up working as a management consultant, so my engineering activities take the form of a hobby. I build and operate mini submarines.
Sub builders have diverse motivations. Some are marine archeologists, others treasure hunters, and most are just inveterate tinkerers. In my case I aspire to use my little boats for educational purposes, on a zero-cost basis, for educational or research initiatives that further ocean conservation. If you are an educator, student, etc. who could use a sub or a presenter for any project that furthers ocean conservation, please don't hesitate to contact me.