Can a Muslim postpone his/her prayers because of working?

If a Muslim was at work, would it be ok if he prays the noon prayer with the afternoon prayer or does he has to do it with the evening prayer?

Dear Brother / Sister,

One of the obligations of five daily prayers is to perform them on due time. Prayers cannot be performed by joining them together because of working. One must perform even only the obligatory part of the prayer on due time. If one did not perform it on due time, one should perform compensatory prayer as soon as possible and in addition, one should repent of the sin of postponing the prayer until compensation.

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Questions on Islam