Within the world of fire/rescue, there are two particularly thankless jobs. First, 911 dispatchers, who are the first point of contact for the emergency system, and who must sort out the chaotic, frightening moments of an unfolding emergency*. The other thankless position is the one who arranges to have the correct staffing at every fire station, every day. Both these positions have this in common: when they do their jobs exceptionally well, no one pays any attention. When they screw up, letting their humanity show over the phone or radio, or short-staffing a station, everyone calls them out on the mistake.
I would have thought that was the textbook definition of a thankless job: one in which good performance goes unrewarded, but bad performance is immediately condemned. This chart proposes more axes of thanklessness, including pay, public opinion, stress, and environment.
For obvious reasons, I found it interesting that this and other lists classified fire/rescue as "thankless." It's true, I don't always get thanked for what I do, but I also enjoy having a career that's lauded and seen as worthwhile. More importantly, firefighting is listed as one of the careers with highest job satisfaction. That list, which discusses the "crummiest careers" and what makes them so rough, is worth a read. Not surprisingly, we don't reward the people who have to deal with our junk (literally and metaphorically) nearly as much as we should.
[* If you want to hear why I have so much respect for dispatchers, listen to this audio of a dispatcher handling emergency radio traffic after three police officers were shot while responding to a domestic disturbance. She is calm and controlled on an extremely tense and emotional incident.]