Working on the second edition (to appear in 2021) of:

I'm a TeX enthusiast. After studying mathematics in Jena and Hamburg I've been working as IT Admin and Communication Officer onboard of cruise ships, now I work as a network engineer for an airline.

I'm maintaining

• TeXample.net with the TikZ example gallery
• LaTeX.org with its forums and LaTeX.net
• TeXblog.net, where I publish some ideas and news from the TeX world

and I'm an active user in math forums such as on matheplanet.com.