response to salat at work
as-salaamu alaykum wa rahmatullah, just reflecting on the information provided in your post I think it is imperative for you to consider the following, during the time of the prophet[alayhi salam] the place where the people relieved themselves was called baytul khalaa, it was an area in which the people used to relieve themselves and it is not what we understand today as a bathroom. I AM IN NO WAY SAYING THAT IT IS PERMISSIBLE TO PRAY IN THE SHOWER ROOM. How ever what I am saying is perhaps you can forward this question to a site that gives islamic verdicts. Also keep in mind that there are individual who may urinate in shower rooms akramakumullah. So from the prerequisites for prayer is that the place of worship is taahir. So when and if you pursue this fatwa then include this in your question.
Also if possible, im sure many jobs will accomodate you, maybe an office area or an area away from everyone for five or ten minutes, not to mention that you may join your salawaat, dhuhr and asr or maghrib and isha, there are discussions concerning these issues, there is a principle that we need to understand, "wa li-kulli makana maqala" for every situation or place there is a statement. It would do us well to look into these.
Wa Billahit Tawfeeq