Prayer: What does “one whose job is traveling” mean? Should someone who travels for work pray full or shortened?

Practical Laws of Islam as per the teachings of Imam Khamenei

Prayer: What does “one whose job is traveling” mean? Should someone who travels for work pray full or shortened?

English:

Question #639:

A person travels as a preliminary to his job, should he perform his prayer complete, or does this rule apply only to someone whose job is traveling? What do marji‘s such as Imam Khomeini mean by the phrase “one whose job is traveling”. Is there anyone whose job is to travel? This is because the jobs of a shepherd, a driver, a sailor, etc. are to look after the sheep, or to drive, or to sail, respectively. Basically, there is no one whose job is traveling as such.

Answer #639:

Whoever travels as a preliminary to his job and at least once every ten days goes back and forth between his home and place of work should perform his prayer complete and his fasting is valid. The phrase “one whose job is traveling” in the statements of mujtahids, may Allah be pleased with them, means someone whose job itself involves traveling, like the jobs mentioned in the question.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Prayer