Ruling on combining Salahs under circumstances of work
If you can perform each Salah at its respective due time in the workplace, you have to do so once it is possible. If this is unfeasible, you should combine Zhuhr (Noon) with `Asr (Afternoon) Prayer and Maghrib (Sunset) with `Isha' (Night) Prayer at the time of the earlier, before work begins, or at the time of the later, after work time. As for Fajr (Dawn) Prayer, it should be performed uncombined at its due time. It is invalid to combine Salahs in a manner different from those previously mentioned.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.