Praying in scattered groups in a workplace musalla

I am working in a gas plant in saudi arabia. We have a small Musalla that we hold prayer at. The problem is that we do not hold prayer in congrigation. Scattered groups come to the Musallah in differnet times and hold prayers (Only Dhur and Asar prayers). We do not have a designated Imam nither do we have a set time to have one congrigation. We have tried several times to hold the prayer in one congrigation however we fialed and continued praying in scattered group.
Is holding prayer in this manner permisible?
It should be noted that our works can be stopped during prayer times since we are all doing an office work.