I have been writing and arranging music for 30+ years, mostly for church settings. I taught music (public school, private school, & college level) for a few years prior to becoming a pastor in a local church. Most of my writing and arranging has been for percussion ensemble but I have also composed or arranged for wind ensemble, brass ensemble, choir, solo and small group voice, and various odd instrumental groups (e.g. flute, trumpet, violin, trombone; all at differing skill levels) to enable the musicians which were available to have something to play together.
I also write exercises, small duets, and other bits for my students to assist them with their own skill development.