I've been writing fiction intermittently since I was old enough to hold a pencil.
My first book-length manuscript was rejected by two major publishers when I was 11 years old, the first of many rejections to follow (never mind how many! enough about that). Over the years, I've refined my craft through workshops, conventions, a writers' group, reading, and, of course, writing.
There's a little more about me and my writing in my Smashwords author interview.
I retired from a job as a senior engineer in the R&D department of a major turbomachinery manufacturer, doing computational fluid dynamics (CFD) analyses and design work. This let me make great pictures like this and, better yet, figure out what they meant, but it didn't allow me to do much writing. I always looked forward to opportunities to write especially clear reports and give engaging presentations (I'm an unusual engineer).
I have written or co-authored several technical papers (as well as a few Navy technical manuals, but they wouldn't let me sign those). But even I will admit that, unless you happen to be interested in the particular subject matter, you're better off to stick with my fiction.
I also compose, arrange, and play music as a hobby, mostly on piano and synthesizer, and occasionally on a hammered dulcimer. (I'm still trying to get the hang of the theremin.) A little of my music is available on the Music page of this web site.