Why do you specialize in writing for construction?

For many years, I wrote content for every niche and topic you can imagine, from health to alternative energy and law to fashion. 

However, unlike most writers, while I was working on honing my craft as a writer, I was also working full days as a construction estimator and project manager. 

Since I've always filled the need for professional writing for the companies I've worked for, I realized that there are many other construction companies out there who need professional writing services from someone who speaks construction fluently.