Broadcast, yes. Professional...that depends on the situation.
I got started in college radio about 15 years ago and got so caught up in it I said, "I don't need the classes, I have all the education I need right here at the station." In about 3 years, I ended up at the local AM station, starting as the remote tech and every-other-Saturday-from-1-'til-signoff guy, then doing middays (until I got satellited out of that slot), and ultimately every other Saturday morning.
I also did some time at a small AM in the Poconos, which kinda got me into TV. Got bored one shift, looked for sut'm to read, found the paper, and lo and behold there was a position for a master control operator at the local TV station. I applied, got the job (and my SBE certification), and kept it for 3 1/2 years. Man, could I tell you some stories about that place. Just keep the money out of it. They did, and that's why I hopped over to the PBS station. My time got cut sadly short there because of another opportunity...
And so for the past 4 years I've been a master control operator for a group of cable networks: specifically, one your kids love, one that you enjoy for the fights it airs, one that used to have great classic shows but now has a lot of reality, and soon, one that has more reality shows than music these days (but to its credit, does still air music).
I miss the things that can only happen on live and local TV (and radio), but this was too good of an opportunity to pass up, so I'm here for the duration.